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[AK4635]
= Preliminary =
AK4635
16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
GENERAL DESCRIPTION The AK4635 is a 16-bit mono CODEC with Microphone-Amplifier, Speaker-Amplifier and VideoAmplifier. Input circuits include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit. Output circuits include a Speaker-Amplifier and Mono Line Output. Video circuits include a LPF and Video-Amplifier. The AK4635 suits a moving picture of Digital Still Camera and etc. This speaker-Amplifier supports a Piezo Speaker. The AK4635 is housed in a space-saving 29-pin Wafer Level CSP 2.5mm x 3.0mm package. FEATURE 16-Bit Delta-Sigma Mono CODEC Recording Function * 1ch Mono Input * MIC Amplifier: (0dB/+3dB/+6dB/+10dB/ +17dB/+20dB/+23dB/+26dB/+29dB/+32dB) * Digital ALC (Automatic Level Control) (+36dB -54dB, 0.375dB Step, Mute) * ADC Performance (MIC-Amp=+20dB) - S/(N+D): 84dB - DR, S/N: 86dB * Wind-noise Reduction Emphasis * 5 band notch Filter Playback Function * Digital ALC (Automatic Level Control) (+36dB -54dB, 0.375dB Step, Mute) * Mono Line Output: S/(N+D) : 85dB, S/N : 93dB * Mono Class-D Speaker-Amp - BTL Output - Output Power: 400mW @ 8 (SVDD=3.3V) - S/(N+D): 55dB (150mW@8) * Beep Generator Video Function * A Composite Video Input * Gain Control (-1.0dB +10.5dB, 0.5dB Step) * Low Pass Filter * A Video-Amp for Composite Video Signal(+6dB) * DC Direct Output or Sag Compensation Output Power Management PLL Mode: * Frequencies: 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin) 1fs (FCK pin) 16fs, 32fs or 64fs (BICK pin) EXT Mode: * Frequencies: 256fs, 512fs or 1024fs (MCKI pin) Sampling Rate: * PLL Slave Mode (FCK pin): 7.35kHz ~ 48kHz * PLL Slave Mode (BICK pin): 7.35kHz ~ 48kHz * PLL Slave Mode (MCKI pin):
2007/10 -1-
1. 2.
3.
4.
5. 6.
7. 8.
Rev. 0.6
[AK4635]
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz * PLL Master Mode: 8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz * EXT Slave Mode / EXT Master Mode: 7.35kHz ~ 48kHz (256fs), 7.35kHz ~ 26kHz (512fs), 7.35kHz ~ 13kHz (1024fs) 9. Output Master Clock Frequency: 256fs 10. Serial P Interface: 3-wire, I2C Bus (Ver 1.0, 400kHz High Speed Mode) 11. Master / Slave Mode 12. Audio Interface Format: MSB First, 2's compliment * ADC: DSP Mode, 16bit MSB justified, I2S * DAC: DSP Mode, 16bit MSB justified, 16bit LSB justified, I2S 13. Ta = - 30 85C 14. Power Supply * Analog Supply (AVDD): 2.8 3.6V * Digital Supply (DVDD): 1.6 3.6V * Speaker Supply (SVDD): 2.2 4.0V 15. Package: 29pin CSP (2.5mm x 3.0mm, 0.5mm pitch)
Block Diagram
AVDD
PMMP
VSS1
VCOM
DVDD
VSS2
MPI
MIC Power Supply
PDN I2C
MIC/MICP Mic LIN/MICN
PMADC
A/D
MIC-Amp 0dB /+3dB/+6dB/+10dB/+17dB/+20dB +23dB+26dB / +29dB / +32dB
HPF
PMPFIL
BICK HPF LPF Audio I/F FCK SDTO
5 Band EQ VOL (ALC)
PMAO
PMDAC & PMAO
SDTI
Line Out
AOUT
D/A
SVDD VSS3
PMDAC SMUTE DATT PMPLL PMSPK
MCKO MCKI PLL
SPP Speaker SPN
Class-D SPK-AMP PMSPK BEEP Generator
VCOC
PMV
Composite Video Out
VOUT
+6dB
GCA
-1dB ~ +10.5dB Step 0.5dB
LPF CLAMP Control Register
CSN/SDA CCLK/SCL CDTIO
VSAG
VIN
Figure 1. AK4635 Block Diagram
Rev. 0.6 -2-
2007/10
[AK4635]
Ordering Guide
AK4635ECB AKD4635 -30 +85C 29pin CSP (0.5mm pitch) Evaluation board for AK4635
Pin Layout
6 5 4
Top View
3 2 1 A B C D E
6 5 4 3 2 1
I2C SDTO BICK FCK PDN VSAG A
DVDD MCKO SDTI CCLK/SCL CSN/SDA
VSS2 SPN MCKI CDTIO VOUT VSS1
VSS3 SVDD AOUT MPI VCOM AVDD D
NC SPP LIN/ MICN MIC/ MICP VCOC VIN E
B
C
Rev. 0.6 -3-
2007/10
[AK4635]
Compatibility with AK4633
1. Function Function MIC-Amp Single End of Analog Input LPF Notch Filter ( Equalizer) SPK-Amp ALC Recovery Waiting Period Master Clock Mode PLL Mode Frequency BEEP Output Control Interface Video-Amp Package AK4633 0dB/+6dB/+10dB/+14dB +17dB/+20dB/+26dB/+32dB 1ch (MIC pin) Not Available 2 band Class-AB 4 steps (128fs ~ 1024fs) 11.2896MHz, 12MHz, 12.288MHz, 13.5MHz 24MHz, 27MHz Analog Input 3-wire Not Available 24pin QFN: 4.0mm x 4.0mm AK4635 0dB/+3dB/+6dB/+10dB/+17dB/ +20dB/+23dB/+26dB/+29dB/ +32dB 2ch (MIC pin / LIN pin) Available 5 band Class-D 8 steps (128fs ~ 16384fs) 12MHz, 13.5MHz, 24MHz, 27MHz Generator circuit Included 3-wire, I2C Available 29pin WL-CSP : 2.5mm x 3.0mm
Rev. 0.6 -4-
2007/10
[AK4635]
PIN/FUNCTION
No. D2 C1 D1 E2 A2 A6 B2 B3 C3 B4 A5 A3 A4 B6 C6 C4 B5 E5 C5 D6 D5 D4 D3 E3 E4 E1 C2 A1 E6 Pin Name VCOM VSS1 AVDD VCOC PDN I2C CSN SDA CCLK SCL CDTIO SDTI SDTO FCK BICK DVDD VSS2 MCKI MCKO SPP SPN VSS3 SVDD AOUT MPI MIC MICP LIN MICN VIN VOUT VSAG NC I/O O O I I I I/O I I I/O I O I/O I/O I O O O O O I I I I I O I Function Common Voltage Output Pin, 0.45 x AVDD Bias voltage of ADC inputs and DAC outputs. Ground Pin Analog Power Supply Pin Output Pin for Loop Filter of PLL Circuit This pin should be connected to VSS1 with one resistor and capacitor in series. Power-Down Mode Pin "H": Power up, "L": Power down reset and initialize the control register. AK4635 should always be reset when powered-up. Control Mode Select Pin "H":I2C Bus, "L":3-wire Serial Chip Select Pin (I2C pin = "L") Control Data Input/Output Pin (I2C pin = "H") Control Data Clock Pin (I2C pin = "L") Control Data Clock Pin (I2C pin = "H") Control Data Input/Output Pin (I2C pin = "L") This pin should be connected to the ground. (I2C pin = "H") Audio Serial Data Input Pin Audio Serial Data Output Pin Frame Clock Pin Audio Serial Data Clock Pin Digital Power Supply Pin Ground Pin External Master Clock Input Pin Master Clock Output Pin Speaker Amp Positive Output Pin Speaker Amp Negative Output Pin Ground Pin Speaker Amp Power Supply Pin Mono Line Output Pin MIC Power Supply Pin for Microphone Microphone Input Pin for Single Ended Input (MDIF bit = "0") Microphone Positive Input Pin for Differential Input (MDIF bit = "1") Line Input Pin for Single Ended Input (MDIF bit = "0") Microphone Negative Input Pin for Differential Input (MDIF bit = "1") Composite Video Signal Input Pin Composite Video Signal Driver Pin Composite Video Signal Output Feedback Input Pin No Connection No internal bonding. This pin should be connected to the ground.
Note : All input pins except analog input pins (MIC/MICP, LIN/MICN, VIN, VSAG pins) must not be left floating
Rev. 0.6 -5-
2007/10
[AK4635]
Handling of Unused Pin
The unused I/O pins should be processed appropriately as below. Classification Analog Pin Name MIC/MICP, LIN/MICN, MPI, AOUT, SPP, SPN, VCOC, VIN, VOUT, VSAG MCKI, SDTI CDTIO MCKO, SDTO Setting These pins should be open These pins should be connected to VSS2 When I2C pin = "H", These pins should be connected to VSS2. These pins should be open.
Digital
ABSOLUTE MAXIMUM RATINGS (VSS1-3 =0V; Note 1) Parameter Symbol min -0.3 AVDD Analog Power Supplies: -0.3 DVDD Digital -0.3 SVDD Speaker-Amp Input Current, Any Pin Except Supplies IIN Analog Input Voltage (Note 3) VINA -0.3 Digital Input Voltage (Note 4) VIND -0.3 Ambient Temperature (powered applied) Ta -40 Storage Temperature Tstg -65 Maximum Power Dissipation (Note 2) Pd -
max 4.6 4.6 4.6 10 AVDD+0.3 DVDD+0.3 85 150 400
Units V V V mA V V C C mW
Note 1. All voltages with respect to ground. VSS21, VSS2 and VSS3 must be connected to the same analog ground plane. Note 2.When PCB wiring density is 100%. This power is the AK4635 internal dissipation that does not include power of externally connected speaker. Note 3. LIN/MICN, MIC/MICP,VIN pins Note 4. PDN, I2C, CSN/SDA, CCLK/SCL, CDTIO, SDTI, FCK, BICK, MCKI pins Pull-up resistors at SDA and SCL pins should be connected to (DVDD+0.3)V or less voltage. WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS (VSS1-3=0V; Note 1) Parameter Symbol Min typ 2.8 (Note 6) AVDD 3.3 Power Supplies Analog DVDD 3.3 Digital (Note 5) 1.6 SVDD 3.3 Speaker-Amp 2.2
max 3.6 3.6 4.0
Units V V V
Note 1. All voltages with respect to ground. Note 5. The power up sequence between AVDD, DVDD and SVDD is not critical. It is not permitted to power DVDD off when AVDD or SVDD is powered up. When only AVDD or SVDD is powered OFF, the AK4635 must be reset by bringing the PDN pin "L" after theses power supplies are powered ON again. The power supply current of DVDD at power-down mode may be increased. DVDD should not be powered OFF while AVDD or SVDD is powered ON. Note 6. Video Amp is used (PMV bit = "1"). When Video Amp is not used (PMV bit = "0"), Min. spec of AVDD is 2.2V. * AKEMD assumes no responsibility for the usage beyond the conditions in this datasheet.
Rev. 0.6 -6-
2007/10
[AK4635]
ANALOG CHRACTERISTICS (Ta=25C; AVDD=DVDD=SVDD=3.3V; VSS1-3 =0V; fs=8kHz, BICK=64fs; Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz 3.4kHz; EXT Slave Mode; unless otherwise specified) Parameter min typ max Units MIC Amplifier: MIC, LIN pins ; MDIF bit = "0"; (Single-ended input) Input Resistance 20 30 40 k Gain (MGAIN3-0 bits = "0000") 0 dB (MGAIN3-0 bits = "0001") 20 dB (MGAIN3-0 bits = "0010") 26 dB (MGAIN3-0 bits = "0011") 32 dB (MGAIN3-0 bits = "0100") 10 dB (MGAIN3-0 bits = "0101") 17 dB (MGAIN3-0 bits = "0110") 23 dB (MGAIN3-0 bits = "0111") 29 dB (MGAIN3-0 bits = "1000") 3 dB (MGAIN3-0 bits = "1001") 6 dB MIC Amplifier: MICP, MICN pins ; MDIF bit = "1"; (Full-differential input) Input Voltage (MGAIN3-0 bits = "0001") 0.228 Vpp (Note 7) (MGAIN3-0 bits = "0010") 0.114 Vpp (MGAIN3-0 bits = "0011") 0.057 Vpp (MGAIN3-0 bits = "0100") 0.720 Vpp (MGAIN3-0 bits = "0101") 0.322 Vpp (MGAIN3-0 bits = "0110") 0.161 Vpp (MGAIN3-0 bits = "0111") 0.080 Vpp (MGAIN3-0 bits = "1001") 1.14 Vpp MIC Power Supply: MPI pin Output Voltage (Note 8) TBD 2.64 TBD V Load Resistance 2 k Load Capacitance 30 pF ADC Analog Input Characteristics: MIC/LIN ADC, MIC Gain=20dB, IVOL=0dB, ALC1bit = "0" Resolution 16 Bits Input Voltage (MIC Gain = 20dB) (Note 9) TBD 0.198 TBD Vpp TBD 84 dB S/(N+D) (-1dBFS) (Note 10) TBD 86 dB D-Range (-60dBFS) S/N TBD 86 dB DAC Characteristics: Resolution 16 Bits Mono Line Output Characteristics: AOUT pin, DAC AOUT, RL=10k TBD 1.98 TBD Vpp Output Voltage (Note 11) LOVL bit = "0" TBD 2.50 TBD Vpp LOVL bit = "1" TBD 85 dB S/(N+D) (0dBFS) (Note 10) TBD 93 dB D-Range (-60dBFS) TBD 93 dB S/N 10 Load Resistance k 30 pF Load Capacitance Speaker-Amp Characteristics: SDTI SPP/SPN pins, ALC2 bit = "0", SPKG bit = "0", RL=8 + 10H, BTL, SVDD=3.3V Output Power (0dBFS) (Note 12) 400 mW S/(N+D) 400mW Output 20 dB 150mW Output 55 dB TBD -80 dBV Output Noise Level Load Resistance 8 30 pF Load Capacitance
Rev. 0.6 -7-
2007/10
[AK4635]
Parameter Speaker-Amp Characteristics: SDTI
Output Voltage (0dBFS) S/(N+D) (Note 13) Output Noise Level (Note 13) Load Impedance (Note 14) Load Capacitance V Input Characteristics: Maximum Input Voltage (Note 17) Pull Down Current V Output Characteristics: Output Gain VIN = 100kHz (GCA = 0dB) (Note 18) Maximum Output at DC output at Sag Compensation Output Voltage (Note 18) 100F+4.7F, AVDD 3.0 V at Sag Compensation Output 47F+4.7F, AVDD 3.1V Clamp Voltage at DC output (Note 18) S/N BW = 100kH 6MHz (Note 18) Secondary Distortion VIN = 3.58MHz, 1.0Vpp (Sin Wave) (Note 18, Note 19) Load Resistance Load Capacitance CL1 (Figure 4) CL2 (Figure 5) CL3 (Figure 4, Figure 5) (Note 20) LPF Frequency Response Response at 6.75MHz Input=1.26Vpp, Sin Wave Response at 27MHz (0dB at 100kHz) Group Delay |GD3MHz - GD6MHz| GCA Characteristics: Step Size GCA = -1.0dB +10.5dB Power Supplies Power Up (PDN pin = "H") All Circuit Power-up Except Video Amp (Note 21) AVDD+DVDD fs = 8kHz fs = 48kHz SVDD: Speaker-Amp Normal Operation (No Output) SVDD=3.3V Video Amp Power-up : (Note 22) (Note 24) AVDD+DVDD All Circuit Power-up : (Note 23) (Note 24) AVDD+DVDD fs = 48kHz Power Down (PDN pin = "L") (Note 25) AVDD+DVDD+SVDD
Min Typ max Units SPP/SPN pins, ALC2 bit = "0", SPKG bit = "0", CL = 3F, Rseries = 10 x 2, BTL, SVDD = 3.8V (Note 12) 2.5 Vrms 20 dB -68 dBV 50 3 F TBD TBD 140 TBD TBD 1.2 1.0 6.0 2.52 2.4 2.4 50 66 -45 150 -0.5 -40 10 0.5 TBD 30 15 400 TBD 100 TBD Vpp A dB Vpp Vpp Vpp mV dB dB pF pF pF dB dB ns dB
-
9 12 1.5 8 19 1
TBD TBD TBD TBD TBD
mA mA mA mA mA A
Note 7. The voltage difference between MICP and MICN pins. AC coupling capacitor should be inserted in series at each input pin. Full-differential mic input is not available at MGAIN3-0 bits = "1000" or "0000". Maximum input voltage of MICP and MICN pins are proportional to AVDD voltage, respectively. Vin = |(MICP) - (MICN)| = 0.069 x AVDD(max)@MGAIN3-0 bits = "0001", 0.035 x AVDD(max)@MGAIN3-0 bits = "0010", 0.017 x AVDD(max)@MGAIN3-0 bits = "0011", 0.218x AVDD(max)@MGAIN3-0 bits = "0100", 0.097x AVDD(max)@MGAIN3-0 bits = "0101", 0.048x AVDD(max)@MGAIN3-0 bits = "0110", 0.024x AVDD(max)@MGAIN3-0 bits = "0111", Rev. 0.6 -82007/10
[AK4635]
0.345x AVDD(max)@MGAIN3-0 bits = "1001" When the signal larger than above value is input to MICP or MICN pin, ADC does not operate normally. Note 8. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ) Note 9. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD (typ) Note 10. When a PLL reference clock is FCK pin in PLL Slave Mode, S/ (N+D) of MIC ADC is 75dB (typ), S/ (N+D) of DAC AOUT is 75dB (typ). Note 11. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ)@LOVL bit = "0". Note 12. The value after passing LPF (LPF : Passband is 20kHz or less, Stopband Attenuation@250kHz is -50dB or less) Note 13. In case of measuring at between the SPP pin and SPN pin directly. Note 14. Load impedance is total impedance of series resistance (Rseries) and piezo speaker impedance at 1kHz in Figure 48. Load capacitance is capacitance of piezo speaker. When piezo speaker is used, 10 or more series resistors should be connected at both SPP and SPN pins, respectively. Note 15. Maximum input voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD x Rin/20k (typ). Note 16. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ). Note 17. Input Voltage does not depend on AVDD voltage. Note 18. Measurement point is A of Figure 2 and Figure 3 when Sag Compensation mode and DC Output mode.
Measurement point A 75 +6dB VOTU 75 VSAG
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB
Figure 2 Measurement Point (at DC Output)
Measurement point A C1 +6dB VOUT 75 VSAG C2 75
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB
Figure 3. Measurement Point (Using Sag Compensation circuit) Note 19. In the case of using Sag Compensation Circuit with 47F+ 4.7F and SAGC bit = "1" Note 20. R1 and C2 compose of Low Pass Filter (LPF) in Figure 5. The cut off frequency of LPF is 10.6MHz at C2=400pF.
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB +6dB VOUT VSAG CL1
R1 75 R2 75 CL3
Figure 4. Load Capacitance CL1 and CL3 (at DC Output)
Rev. 0.6 -9-
2007/10
[AK4635]
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB +6dB VOUT VSAG CL2 CL2
C1 C2
R1 75 R2 75 CL3
CL2
Figure 5. Load Capacitance CL2 and CL3 (Using Sag Compensation circuit) Note 21.PLL Master Mode (MCKI = 12MHz) and PMMP = PMADC = PMDAC = PMPFIL = PMSPK = PMVCM = PMPLL = MCKO = PMAO = M/S = "1" and PMV bit = "0". And output current from the MPI pin is 0mA. When the AK4635 is EXT mode (PMPLL = MCKO = M/S = "0"), "AVDD+DVDD" is typically TBD mA@fs=8kHz, TBDmA@fs=48kHz Note 22. PMVCM = PMV bits = "1", PMMP = PMADC = PMDAC = PMPFIL = PMSPK = PMPLL = MCKO = PMAO = M/S ="0". And output current from the MPI pin is 0mA. (When SAGC bit = "0", no resistance and no input signal of the VIN pin ) Note 23. PLL Master Mode (MCKI = 12MHz) and PMMP = PMADC = PMDAC = PMPFIL = PMSPK = PMVCM = PMPLL = MCKO = PMAO = PMBP = M/S = PMV = "1". And output current from the MPI pin is 0mA. (This is the case of when SAGC bit = "0" and no load resistance and capacitance and no input signal of the VIN pin ) Note 24. When SAGC bit = "1" and Black signal is output, this current is typ.TBD mA. In the case of DC Output, this current increases by DC voltage /150 . DC Output Voltage is 0V at PMV bit = "0", and then DC current does not flow. When any signal is not input at using Sag Compensation Circuit, PMV bit should be set "0". Note 25. All digital inputs pins are fixed to DVDD or VSS2.
Rev. 0.6 - 10 -
2007/10
[AK4635]
FILTER CHRACTERISTICS (Ta = -30 85C; AVDD = 2.8 3.6V; DVDD = 1.6 3.6V, SVDD = 2.2 4.0V; fs=8kHz) Parameter Symbol min typ max ADC Digital Filter (Decimation LPF): Passband (Note 26) 0.16dB PB 0 3.0 -0.66dB 3.5 -1.1dB 3.6 -6.9dB 4.0 Stopband (Note 26) SB 4.7 Passband Ripple PR 0.1 Stopband Attenuation SA 73 Group Delay (Note 27) GD 16 Group Delay Distortion GD 0 DAC Digital Filter (Decimation LPF): Passband (Note 26) 0.16dB PB 0 3.0 -0.54dB 3.5 -1.0dB 3.6 -6.7dB 4.0 Stopband (Note 26) SB 4.7 Passband Ripple PR 0.1 Stopband Attenuation SA 73 Group Delay (Note 27) GD 16 Group Delay Distortion GD 0 DAC Digital Filter + Analog Filter: Frequency Response: 0 3.4kHz FR 1.0 -
Units kHz kHz kHz kHz kHz dB dB 1/fs s
dB kHz dB dB 1/fs s dB
Note 26. The passband and stopband frequencies are proportional to fs (system sampling rate). For example, ADC of PB = 3.6kHz is 0.45*fs (@ -1.0dB). A reference of frequency response is 1kHz. Note 27. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the 16-bit data of a channel from the input register to the output register of the ADC. For the DAC, this time is from setting the 16-bit data of a channel from the input register to the output of analog signal. When there is not a phase change with the IIR filter, the group delay of the programmable filter (primary HPF + primary LPF + 5-band Equalizer + ALC) increases for 2/fs than a value of an above mention.
DC CHRACTERISTICS (Ta = -30 ~ 85C; AVDD = 2.8 3.6V, DVDD = 1.6 3.6V, SVDD = 2.2 4.0V) Parameter Symbol min 70%DVDD VIH High-Level Input Voltage (DVDD 2.2V) 80%DVDD (DVDD < 2.2V) VIL Low-Level Input Voltage (DVDD 2.2V) (DVDD < 2.2V) DVDD-0.2 VOH High-Level Output Voltage (Iout = -80A) Low-Level Output Voltage (Except SDA pin: Iout = 80A) VOL1 (SDA pin, 2.0V DVDD 3.6V: Iout = 3mA) VOL2 (SDA pin, 1.6V DVDD < 2.0V: Iout = 3mA) VOL2 Input Leakage Current Iin -
typ -
max 30%DVDD 20%DVDD 0.2 0.4 20%DVDD 10
Units V V V V V V V A
Rev. 0.6 - 11 -
2007/10
[AK4635]
SWITING CHARACTERISTICS (Ta = -30 ~ 85C; AVDD = 2.8 3.6V, DVDD = 1.6 3.6V, SVDD = 2.2 4.0V; CL = 20pF) Parameter Symbol min typ max PLL Master Mode (PLL Reference Clock = MCKI pin) (Figure 6) MCKI Input: Frequency fCLK 11.2896 27.0 Pulse Width Low tCLKL 0.4/fCLK Pulse Width High tCLKH 0.4/fCLK MCKO Output: 256 x fFCK fMCK Frequency 60 50 40 dMCK Duty Cycle except fs=29.4kHz, 32kHz 33 dMCK fs =29.4kHz, 32kHz (Note 28) 48 8 fFCK FCK Output: Frequency Pulse width High tBCK tFCKH (DIF1-0 bits = "00" and FCKO bit = "1") Duty Cycle 50 dFCK (DIF1-0 bits = "00" or FCKO bit = "0") 1/16fFCK tBCK BICK: Period (BCKO1-0 = "00") 1/32fFCK tBCK (BCKO1-0 = "01") 1/64fFCK tBCK (BCKO1-0 = "10") 50 dBCK Duty Cycle Audio Interface Timing DSP Mode: (Figure 7, Figure 8) 0.5 x tBCK + 40 0.5 x tBCK -40 0.5 x tBCK tDBF FCK "" to BICK "" (Note 29) 0.5 x tBCK +40 0.5 x tBCK -40 0.5 x tBCK tDBF FCK "" to BICK "" (Note 30) 70 -70 tBSD BICK "" to SDTO (BCKP = "0") 70 -70 tBSD BICK "" to SDTO (BCKP = "1") 50 tSDH SDTI Hold Time 50 tSDS SDTI Setup Time Except DSP Mode: (Figure 9) 40 -40 tBFCK BICK "" to FCK Edge 70 -70 tFSD FCK to SDTO (MSB) (Except I2S mode) 70 -70 tBSD BICK "" to SDTO 50 tSDH SDTI Hold Time 50 tSDS SDTI Setup Time
Units MHz ns ns kHz % % kHz ns % ns ns ns %
ns ns ns ns ns ns ns ns ns ns ns
Rev. 0.6 - 12 -
2007/10
[AK4635]
Parameter Symbol min PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 10, Figure 11) FCK: Frequency DSP Mode: Pulse Width High Except DSP Mode: Duty Cycle BICK: Period Pulse Width Low Pulse Width High FCK: Frequency DSP Mode: Pulse width High Except DSP Mode: Duty Cycle BICK: Period (PLL3-0 bit = "0001") (PLL3-0 bit = "0010") (PLL3-0 bit = "0011") Pulse Width Low Pulse Width High MCKI Input: Frequency Pulse Width Low Pulse Width High MCKO Output: Frequency Duty Cycle except fs=29.4kHz, 32kHz fs=29.4kHz, 32kHz (Note 28) FCK: Frequency DSP Mode: Pulse width High Except DSP Mode: Duty Cycle BICK: Period Pulse Width Low Pulse Width High Audio Interface Timing DSP Mode: (Figure 13, Figure 14) FCK "" to BICK "" (Note 29) FCK "" to BICK "" (Note 30) BICK "" to FCK "" (Note 29) BICK "" to FCK "" (Note 30) BICK "" to SDTO (BCKP bit= "0") BICK "" to SDTO (BCKP bit= "1") SDTI Hold Time SDTI Setup Time Except DSP Mode: (Figure 16) FCK Edge to BICK "" (Note 31) BICK "" to FCK Edge (Note 31) FCK to SDTO (MSB) (Except I2S mode) BICK "" to SDTO SDTI Hold Time SDTI Setup Time fFCK tFCKH duty tBCK tBCKL tBCKH fFCK tFCKH duty tBCK tBCK tBCK tBCKL tBCKH fCLK fCLKL fCLKH fMCK dMCK dMCK fFCK tFCKH duty tBCK tBCKL tBCKH 7.35 tBCK-60 45 1/64fFCK 0.4 x tBCK 0.4 x tBCK 7.35 tBCK-60 45 0.4 x tBCK 0.4 x tBCK 11.2896 0.4/fCLK 0.4/fCLK 40 8 tBCK-60 45 1/64fFCK 0.4 x tBCK 0.4 x tBCK
typ 8 8 1/16fFCK 1/32fFCK 1/64fFCK 256 x fFCK 50 33 -
max 48 1/fFCK-tBCK 55 1/16fFCK 48 1/fFCK-tBCK 55 27.0 60 48 1/fFCK-tBCK 55 1/16fFCK -
Units kHz ns % ns ns ns kHz ns % ns ns ns ns ns MHz ns ns kHz % % kHz ns % ns ns ns
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 10, Figure 11)
PLL Slave Mode (PLL Reference Clock: MCKI pin) (Figure 12)
tFCKB tFCKB tBFCK tBFCK tBSD tBSD tSDH tSDS tFCKB tBFCK tFSD tBSD tSDH tSDS
0.4 x tBCK 0.4 x tBCK 0.4 x tBCK 0.4 x tBCK 50 50 50 50 50 50
-
80 80 80 80 -
ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Rev. 0.6 - 13 -
2007/10
[AK4635]
Parameter EXT Slave Mode (Figure 15) MCKI Frequency: 256fs 512fs 1024fs Pulse Width Low Pulse Width High FCK Frequency (MCKI = 256fs) (MCKI = 512fs) (MCKI = 1024fs) Duty Cycle BICK Period BICK Pulse Width Low Pulse Width High Audio Interface Timing (Figure 16) FCK Edge to BICK "" (Note 31) BICK "" to FCK Edge (Note 31) FCK to SDTO (MSB) (Except I2S mode) BICK "" to SDTO SDTI Hold Time SDTI Setup Time
Symbol fCLK fCLK fCLK tCLKL tCLKH fFCK fFCK fFCK duty tBCK tBCKL tBCKH tFCKB tBFCK tFSD tBSD tSDH tSDS
min 1.8816 3.7632 7.5264 0.4/fCLK 0.4/fCLK 7.35 7.35 7.35 45 312.5 130 130 50 50 50 50
typ 2.048 4.096 8.192 8 8 8 -
max 12.288 13.312 13.312 48 26 13 55 80 80 -
Units MHz MHz MHz ns ns kHz kHz % ns ns ns ns ns ns ns ns ns
Rev. 0.6 - 14 -
2007/10
[AK4635]
Parameter EXT Master Mode (Figure 6) MCKI Frequency: 256fs 512fs 1024fs Pulse Width Low Pulse Width High FCK Frequency (MCKI = 256fs) (MCKI = 512fs) (MCKI = 1024fs) Duty Cycle BICK: Period (BCKO1-0 bit = "00") (BCKO1-0 bit = "01") (BCKO1-0 bit = "10") Duty Cycle Audio Interface Timing DSP Mode: (Figure 7, Figure 8) FCK "" to BICK "" (Note 29) FCK "" to BICK "" (Note 30) BICK "" to SDTO (BCKP bit = "0") BICK "" to SDTO (BCKP bit = "1") SDTI Hold Time SDTI Setup Time Except DSP Mode: (Figure 9) BICK "" to FCK Edge FCK to SDTO (MSB) (Except I2S mode) BICK "" to SDTO SDTI Hold Time SDTI Setup Time
Symbol fCLK fCLK fCLK tCLKL tCLKH fFCK fFCK fFCK dFCK tBCK tBCK tBCK dBCK
min 1.8816 3.7632 7.5264 0.4/fCLK 0.4/fCLK 7.35 7.35 7.35 -
typ 2.048 4.096 8.192 8 8 8 50 1/16fFCK 1/32fFCK 1/64fFCK 50
max 12.288 13.312 13.312 48 26 13 -
Units MHz MHz MHz ns ns kHz kHz kHz % ns ns ns %
tDBF tDBF tBSD tBSD tSDH tSDS tBFCK tFSD tBSD tSDH tSDS
0.5 x tBCK-40 0.5 x tBCK-40 -70 -70 50 50 -40 -70 -70 50 50
0.5 x tBCK 0.5 x tBCK -
0.5 x tBCK + 40 0.5 x tBCK +40 70 70 40 70 70 -
ns ns ns ns ns ns ns ns ns ns ns
Note 28. Duty Cycle = (the width of "L")/(the period of clock)*100 Note 29. MSBS, BCKP bits = "00" or "11" Note 30. MSBS, BCKP bits = "01" or "10" Note 31. BICK rising edge must not occur at the same time as FCK edge.
Rev. 0.6 - 15 -
2007/10
[AK4635]
Parameter Control Interface Timing (3-wire Serial mode) CCLK Period CCLK Pulse Width Low Pulse Width High CDTI Setup Time CDTI Hold Time CSN "H" Time CSN "" to CCLK "" CCLK "" to CSN "" CCLK "" to CDTI (at Read Command) CSN "" to CDTI (Hi-Z) (at Read Command) Control Interface Timing (I2C Bus mode): SCL Clock Frequency Bus Free Time Between Transmissions Start Condition Hold Time (prior to first clock pulse) Clock Low Time Clock High Time Setup Time for Repeated Start Condition SDA Hold Time from SCL Falling (Note 33) SDA Setup Time from SCL Rising Rise Time of Both SDA and SCL Lines Fall Time of Both SDA and SCL Lines Setup Time for Stop Condition Capacitive Load on Bus Pulse Width of Spike Noise Suppressed by Input Filter Reset Timing PDN Pulse Width (Note 32, Note 33, Note 34) PMADC "" to SDTO valid (Note 35) ADRST bit = "0" ADRST bit = "1"
Symbol tCCK tCCKL tCCKH tCDS tCDH tCSW tCSS tCSH tDCD tCCZ fSCL tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR tF tSU:STO Cb tSP tPD tPDV tPDV
min 200 80 80 40 40 150 50 50 1.3 0.6 1.3 0.6 0.6 0 0.1 0.6 0 150 -
typ 1059 291
max 70 70 400 0.3 0.3 400 50 -
Units ns ns ns ns ns ns ns ns ns ns kHz s s s s s s s s s s pF ns ns 1/fs 1/fs
Note 32. I2C is a registered trademark of Philips Semiconductors. Note 33. RL = 1k/10% change ( Pull-up to DVDD) Note 34. The AK4635 can be reset by the PDN pin = "L" Note 35. This is the count of FCK "" from the PMADC = "1".
Rev. 0.6 - 16 -
2007/10
[AK4635]
Timing Diagram
1/fCLK VIH MCKI VIL tCLKH tCLKL 1/fFCK
FCK dFCK 1/fMCK dFCK
50%DVDD
MCKO tMCKOH tMCKOL
50%DVDD
dMCK = tMCKOL x fMCK x 100%
Figure 6. Clock Timing (PLL/EXT Master mode) (MCKO is not available at EXT Master Mode)
FCK tDBF tBCK dBCK BICK (BCKP = "0")
50%DVDD
50%DVDD
BICK (BCKP = "1") tBSD SDTO
50%DVDD
MSB
50%DVDD
tSDS
tSDH VIH MSB VIL
SDTI
Figure 7. Audio Interface Timing (PLL/EXT Master mode & DSP mode: MSBS = "0")
Rev. 0.6 - 17 -
2007/10
[AK4635]
FCK tDBF tBCK dBCK BICK (BCKP = "1")
50%DVDD
50%DVDD
BICK (BCKP = "0") tBSD SDTO
50%DVDD
MSB
50%DVDD
tSDS
tSDH VIH VIL
SDTI
MSB
Figure 8. Audio Interface Timing (PLL/EXT Master mode & DSP mode: MSBS = "1")
FCK
50%DVDD
tBFCK
dBCK 50%DVDD
BICK tFSD
tBSD
SDTO tSDS tSDH
50%DVDD
VIH SDTI VIL
Figure 9. Audio Interface Timing (PLL/EXT Master mode & Except DSP mode)
Rev. 0.6 - 18 -
2007/10
[AK4635]
1/fFCK VIH VIL tFCKH tBCK VIH BICK (BCKP = "0") tBCKH tBCKL VIH BICK (BCKP = "1") VIL VIL tBFCK
FCK
Figure 10. Clock Timing (PLL Slave mode; PLL Reference clock = FCK or BICK pin & DSP mode; MSBS = 0)
1/fFCK VIH VIL tFCKH tBCK VIH BICK (BCKP = "1") tBCKH tBCKL VIH BICK (BCKP = "0") VIL VIL tBFCK
FCK
Figure 11. Clock Timing (PLL Slave mode; PLL Reference Clock = FCK or BICK pin & DSP mode; MSBS = 1)
Rev. 0.6 - 19 -
2007/10
[AK4635]
1/fCLK VIH MCKI VIL tCLKH 1/fFCK VIH FCK VIL tFCKH tBCK VIH BICK VIL tBCKH 1/fMCK tBCKL tFCKL tCLKL
MCKO tMCKOH tMCKOL
50%DVDD
dMCK = tMCKOL x fMCK x 100%
Figure 12. Clock Timing (PLL Slave mode; PLL Reference Clock = MCKI pin & Except DSP mode)
Rev. 0.6 - 20 -
2007/10
[AK4635]
tFCKH VIH FCK tFCKB VIL
VIH BICK (BCKP = "0") VIH BICK (BCKP = "1") tBSD VIL VIL
SDTO
MSB tSDH
50%DVDD
tSDS
VIH SDTI MSB VIL
Figure 13. Audio Interface Timing (PLL Slave mode & DSP mode; MSBS = 0)
tFCKH VIH FCK tFCKB VIL
VIH BICK (BCKP = "1") VIH BICK (BCKP = "0") tBSD VIL VIL
SDTO
MSB
50%DVDD
tSDS
tSDH VIH
SDTI
MSB
VIL
Figure 14. Audio Interface Timing (PLL Slave mode, DSP mode; MSBS = 1) Rev. 0.6 - 21 2007/10
[AK4635]
1/fCLK VIH MCKI tCLKH 1/fFCK VIH FCK tFCKH tBCK VIH VIL tBCKH tBCKL tFCKL VIL tCLKL VIL
BICK
Figure 15. Clock Timing (EXT Slave mode)
VIH FCK VIL tBFCK tFCKB VIH BICK VIL tFSD tBSD
SDTO tSDS
MSB tSDH
50%DVDD
VIH SDTI VIL
Figure 16. Audio Interface Timing (PLL, EXT Slave mode & Except DSP mode)
Rev. 0.6 - 22 -
2007/10
[AK4635]
VIH CSN VIL tCSS tCCKL tCCKH VIH CCLK VIL tCDS CDTI C1 C0 tCCK tCDH VIH R/W VIL
Figure 17. WRITE Command Input Timing
tCSW VIH CSN VIL tCSH VIH CCLK VIL
VIH CDTI D2 D1 D0 VIL
Figure 18. WRITE Data Input Timing
Rev. 0.6 - 23 -
2007/10
[AK4635]
VIH CSN VIL
CCLK tDCD tCCZ
VIH VIL
CDTI
D3
D2
D1
D0
50% DVDD
Figure 19. Read Data Output Timing
SDA
tBUF tLOW tR tHIGH tF tSP
VIH VIL
VIH SCL VIL
tHD:STA Stop Start tHD:DAT tSU:DAT tSU:STA Start tSU:STO Stop
Figure 20. I2C Bus Mode Timing
PMADC bit tPDV
SDTO
50%DVDD
Figure 21. Power Down & Reset Timing 1
tPD PDN VIL
Figure 22. Power Down & Reset Timing 2
Rev. 0.6 - 24 -
2007/10
[AK4635]
OPERATION OVERVIEW
System Clock
There are the following five clock modes to interface with external devices. (Table 1 and Table 2) Mode PMPLL bit M/S bit PLL3-0 bit PLL Master Mode 1 1 Table 4 PLL Slave Mode 1 Table 4 1 0 (PLL Reference Clock: MCKI pin) PLL Slave Mode 2 Table 4 1 0 (PLL Reference Clock: FCK or BICK pin) EXT Slave Mode 0 0 x EXT Master Mode 0 1 x Table 1. Clock Mode Setting (x: Don't care) Mode PLL Master Mode MCKO bit 0 1 PLL Slave Mode 1 (PLL Reference Clock: MCKI pin) PLL Slave Mode 2 (PLL Reference Clock: FCK or BICK pin) EXT Slave Mode 0 1 0 MCKO pin "L" Output 256fs Output "L" Output 256fs Output "L" Output MCKI pin Master Clock Input for PLL (Note 36) Master Clock Input for PLL (Note 36) GND 256fs/ 512fs/ 1024fs Input 256fs/ 512fs/ 1024fs Input Figure Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28
BICK pin 16fs/32fs/64fs Output 16fs Input 16fs/32fs/64fs Input 32fs Input
FCK pin 1fs Output 1fs Input 1fs Input 1fs Input
0
"L" Output
EXT Master Mode
0
"L" Output
32fs/64fs Output
1fs Output
Note 36. 12MHz/13.5MHz/24MHz/27MHz Table 2. Clock pins state in Clock Mode
Rev. 0.6 - 25 -
2007/10
[AK4635]
Master Mode/Slave Mode
The M/S bit selects either master or slave modes. M/S bit = "1" selects master mode and "0" selects slave mode. When the AK4635 is power-down mode (PDN pin = "L") and exits reset state, the AK4635 is slave mode. After exiting reset state, the AK4635 changes to master mode by bringing M/S bit = "1". When the AK4635 is in master mode, FCK and BICK pins are a floating state until M/S bit becomes "1". The FCK and BICK pins of the AK4635 should be pulled-down or pulled-up by about 100k resistor externally to avoid the floating state. M/S bit Mode 0 Slave Mode (default) 1 Master Mode Table 3. Select Master/Salve Mod
PLL Mode
When PMPLL bit is "1", a fully integrated analog phase locked loop (PLL) generates a clock that is selected by the PLL3-0 and FS3-0 bits. The PLL lock time is shown in Table 4. Ether when the AK4635 is supplied to a stable clocks after PLL is powered-up (PMPLL bit = "0" "1") or when the sampling frequency changes, the PLL lock time is the same. 1) Setting of PLL Mode Mode 0 1 2 3 6 7 12 13 PLL3 bit 0 0 0 0 0 0 1 1 PLL2 bit 0 0 0 0 1 1 1 1 PLL1 bit 0 0 1 1 1 1 0 0 PLL0 bit 0 1 0 1 0 1 0 1 PLL Reference Clock Input Pin Input Frequency R and C of VCOC pin (Note 37) R[] C[F] 6.8k 220n 10k 4.7n 10k 4.7n 10k 4.7n 10k 4.7n 10k 4.7n 10k 10n 10k 10n PLL Lock Time (max) (default)
FCK pin 1fs 160ms BICK pin 16fs 2ms BICK pin 32fs 2ms BICK pin 64fs 2ms MCKI pin 12MHz 20ms MCKI pin 24MHz 20ms MCKI pin 13.5MHz 20ms MCKI pin 27MHz 20ms Others Others N/A Note 37. the tolerance of R is 5%, the tolerance of C is 30% Table 4. Setting of PLL Mode (*fs: Sampling Frequency, N/A: Not available) 2) Setting of sampling frequency in PLL Mode.
When PLL2 bit is "1" (PLL reference clock input is the MCKI pin), the sampling frequency is selected by FS2-0 bits as defined in Table 5. Mode FS3 bit FS2 bit FS1 bit FS0 bit Sampling Frequency 0 0 0 0 0 8kHz (default) 1 0 0 0 1 12kHz 2 0 0 1 0 16kHz 3 0 0 1 1 24kHz 4 0 1 0 0 7.35kHz 5 0 1 0 1 11.025kHz 6 0 1 1 0 14.7kHz 7 0 1 1 1 22.05kHz 10 1 0 1 0 32kHz 11 1 0 1 1 48kHz 14 1 1 1 0 29.4kHz 15 1 1 1 1 44.1kHz Others Others N/A Table 5. Setting of Sampling Frequency at PLL2 bit = "1" and PMPLL bit = "1" (N/A: Not available) Rev. 0.6 - 26 2007/10
[AK4635]
When PLL2 bit is "0" (PLL reference clock input is FCK or BICK pin), the sampling frequency is selected by FS3-2 bits. (Table 6) Mode 0 1 2 Others Sampling Frequency Range 0 0 x x (default) 7.35kHz fs 12kHz 0 1 x x 12kHz < fs 24kHz 1 0 x x 24kHz < fs 48kHz Others N/A (x: Don't care, N/A: Not available) Table 6. Setting of Sampling Frequency at PLL2 bit = "0" and PMPLL bit = "1" FS1 bit FS0 bit FS3 bit FS2 bit
PLL Unlock State
1) PLL Master Mode (PMPLL bit = "1", M/S bit = "1") In this mode, irregular frequency clocks are output from FCK, BICK and MCKO pins after PMPLL bit = "0" "1" or sampling frequency is changed. After that PLL is unlocked, the BICK and FCK pins output "L" for a moment, and invalid frequency clock is output from the MCKO pin at MCKO bit = "1". If the MCKO bit is "0", MCKO pin is output to "L". (Table 7) When sampling frequency is changed, BICK and FCK pins do not output irregular frequency clocks but go to "L" by setting PMPLL bit to "0". MCKO pin BICK pin FCK pin MCKO bit = "0" MCKO bit = "1" After that PMPLL bit "0" "1" "L" Output Invalid "L" Output "L" Output PLL Unlock "L" Output Invalid Invalid Invalid PLL Lock "L" Output 256fs Output See Table 9 1fs Output Table 7. Clock Operation at PLL Master Mode (PMPLL bit = "1", M/S bit = "1") PLL State 2) PLL Slave Mode (PMPLL bit = "1", M/S bit = "0") In this mode, an invalid clock is output from the MCKO pin after PMPLL bit = "0" "1" or sampling frequency is changed. After that, 256fs is output from the MCKO pin when PLL is locked. ADC and DAC output invalid data when the PLL is unlocked. For DAC, the output signal should be muted by writing "0" to DACA and DACS bits in Addr=02H.
MCKO pin MCKO bit = "0" MCKO bit = "1" After that PMPLL bit "0" "1" "L" Output Invalid PLL Unlock "L" Output Invalid PLL Lock "L" Output Output Table 8. Clock Operation at PLL Slave Mode (PMPLL bit = "1", M/S bit = "0") PLL State
Rev. 0.6 - 27 -
2007/10
[AK4635]
PLL Master Mode (PMPLL bit = "1", M/S bit = "1")
When an external clock (12MHz, 13.5MHz, 24MHz or 27MHz) is input to the MCKI pin, the MCKO, BICK and FCK clocks are generated by an internal PLL circuit. The MCKO output frequency is fixed to 256fs, the output is enabled by MCKO bit. The BICK is selected among 16fs, 32fs or 64fs, by BCKO1-0 bits. (Table 9) In DSP mode, FCK output can select Duty 50% or High-output only during 1 BICK cycle (Table 10). Except DSP mode, FCKO bit should be set "0". When BICK output frequency is 16fs, the audio interface format supports Mode 0 only (DSP Mode).
12MHz, 13.5MHz, 24MHz, 27MHz
AK4635
MCKI MCKO BICK FCK SDTO SDTI 256fs 16fs, 32fs, 64fs 1fs
DSP or P
MCLK BCLK FCK SDTI SDTO
Figure 23. PLL Master Mode
Mode 0 1 2 3
BICK Output Frequency 0 0 16fs 0 1 32fs 1 0 64fs 1 1 N/A Table 9. BICK Output Frequency at Master Mode BCKO1 BCKO0
(default)
Mode 0 1
FCKO FCK Output 0 Duty = 50% (default) 1 High Width = 1/fBCK fBCK is BICK Output Frequency. Table 10. FCK Output at PLL Master Mode and DSP Mode
Rev. 0.6 - 28 -
2007/10
[AK4635]
PLL Slave Mode (PMPLL bit = "1", M/S bit = "0")
A reference clock of PLL is selected among the input clocks to the MCKI, BICK or FCK pin. The required clock to the AK4635 is generated by an internal PLL circuit. Input frequency is selected by PLL3-0 bits. When BICK input frequency is 16fs, the audio interface format supports Mode 0 only (DSP Mode). a) PLL reference clock: MCKI pin BICK and FCK inputs should be synchronized with MCKO output. The phase between MCKO and FCK is not important. MCKO pin outputs the frequency selected by FS3-0 bits (Table 5)
12MHz, 13.5MHz, 24MHz, 27MHz
AK4635
MCKI MCKO BICK FCK SDTO SDTI 256fs 16fs, 32fs, 64fs 1fs
DSP or P
MCLK BCLK FCK SDTI SDTO
Figure 24. PLL Slave Mode 1 (PLL Reference Clock: MCKI pin)
Rev. 0.6 - 29 -
2007/10
[AK4635]
b) PLL reference clock: BICK or LRCK pin Sampling frequency corresponds to 7.35kHz to 48kHz by changing FS3-0 bits. (Table 6)
AK4635
MCKO MCKI BICK FCK SDTO SDTI 16fs, 32fs, 64fs 1fs BCLK FCK SDTI SDTO
DSP or P
Figure 25 PLL Slave Mode 2 (PLL Reference Clock: BICK pin)
AK4635
MCKO MCKI BICK FCK SDTO SDTI 16fs 1fs BCLK FCK SDTI SDTO
DSP or P
Figure 26. PLL Slave Mode 2 (PLL Reference Clock: FCK pin) The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or SPK or Programmable Filter is in operation (PMADC bit = "1", PMDAC bit = "1", PMSPK bit = "1", PMPFIL bit = "1"). If these clocks are not provided, the AK4635 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic internally. If the external clocks are not present, the ADC, DAC, SPK and Programmable Filter should be in the power-down mode.(PMADC = PMDAC = PMPFIL bits = "0").
Rev. 0.6 - 30 -
2007/10
[AK4635]
EXT Slave Mode (PMPLL bit = "0", M/S bit = "0")
When PMPLL bit is "0", the AK4635 becomes EXT Slave mode. Master clock is input from the MCKI pin, the internal PLL circuit is not operated. This mode is compatible with I/F of the normal audio CODEC. The clocks required to operate are MCKI (256fs, 512fs or 1024fs), FCK (fs) and BICK (32fs). The master clock (MCKI) should be synchronized with FCK. The phase between these clocks is not important. The input frequency of MCKI is selected by FS1-0 bits. (Table 11) Mode 0 1 2 3 MCKI Input Sampling Frequency Frequency Range x 0 256fs 0 7.35kHz fs 48kHz (default) x 1 1024fs 0 7.35kHz fs 13kHz x 0 512fs 1 7.35kHz fs 26kHz x 1 256fs 1 7.35kHz fs 48kHz Table 11. MCKI Frequency at EXT Slave Mode (PMPLL bit = "0", M/S bit = "0") (x: Don't care) FS3-2 bits FS1 bit FS0 bit
External Slave Mode does not support Mode 0 (DSP Mode) of Audio Interface Format. The S/N of the DAC at low sampling frequencies is worse than at high sampling frequencies due to out-of-band noise.The out-of-band noise can be improved by using higher frequency of the master clock. (Table 12, Table 13) S/N (fs=8kHz, 20kHzLPF + A-weighted) DAC AOUT 256fs 84dB 512fs 92dB 1024fs 92dB Table 12. Relationship between MCKI and S/N of AOUT and SPK-Amp MCKI MCKI
Output Noise Level (SVDD=3.3V,fs=8kHz, 20kHzLPF + A-weighted)
SDTI SPK-Amp 256fs -73dBV 512fs -86dBV 1024fs -88dBV Table 13. Relationship between MCKI and Output Noise Level of SPK-Amp The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or SPK or Programmable Filter is in operation (PMADC = PMDAC = PMSPK bit = PMPFIL bits = "1"). If these clocks are not provided, the AK4635 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic internally. If the external clocks are not present, the ADC, DAC, SPK and Programmable Filter should be in the power-down mode (PMADC = PMDAC = PMSPK bit = PMPFIL bits = "0"). AK4635
MCKO 256fs, 512fs or 1024fs MCKI BICK FCK SDTO SDTI 32fs 1fs MCLK BCLK FCK SDTI SDTO
DSP or P
Figure 27. EXT Slave Mode
Rev. 0.6 - 31 -
2007/10
[AK4635]
EXT Master Mode (PMPLL bit = "0", M/S bit = "1")
The AK4635 becomes EXT Master Mode by setting PMPLL bit = "0" and M/S bit = "1". Master clock is input from the MCKI pin, the internal PLL circuit is not operated. The clock required to operate is MCKI (256fs, 512fs or 1024fs). The input frequency of MCKI is selected by FS1-0 bits (Table 14). The BICK is selected among 32fs or 64fs, by BCKO1-0 bits (Table 15). FCK bit should be set to "0". Mode MCKI Input Sampling Frequency Frequency Range x 0 256fs 0 0 7.35kHz fs 48kHz (default) x 1 1024fs 1 0 7.35kHz fs 13kHz x 0 512fs 2 1 7.35kHz fs 26kHz x 1 256fs 3 1 7.35kHz fs 48kHz Table 14. MCKI Frequency at EXT Master Mode (PMPLL bit = "0", M/S bit = "1") (x: Don't care) FS3-2 bits FS1 bit FS0 bit
External Master Mode does not support Mode 0 (DSP Mode) of Audio Interface Format. MCKI should always be present whenever the ADC, DAC, SPK or Programmable Filter is in operation (PMADC = PMDAC = PMSPK bit = PMPFIL bits = "1"). If MCKI is not provided, the AK4635 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic internally. If MCKI is not present, the ADC, DAC, SPK and Programmable Filter should be in the power-down mode (PMADC = PMDAC = PMSPK = PMPFIL bits = "0").
AK4635
MCKO 256fs, 512fs or 1024fs MCKI BICK FCK SDTO SDTI 32fs, 64fs 1fs MCLK BCLK FCK SDTI SDTO
DSP or P
Figure 28. EXT Master Mode
Mode
BICK Output Frequency 0 0 0 N/A (default) 1 0 1 32fs 2 1 0 64fs 3 1 1 N/A Table 15. BICK Output Frequency at Master Mode (N/A: Not available) BCKO1 BCKO0
Rev. 0.6 - 32 -
2007/10
[AK4635]
Audio Interface Format
Four types of data formats are available and are selected by setting the DIF1-0 bits. (Table 16) In all modes, the serial data is MSB first, 2's complement format. Audio interface formats can be used in both master and slave modes. FCK and BICK are output from the AK4635 in master mode, but must be input to the AK4635 in slave mode. In Mode 1-3, the SDTO is clocked out on the falling edge of BICK and the SDTI is latched on the rising edge. Mode 0 1 2 3 DIF1 0 0 1 1 DIF0 0 1 0 1 SDTO (ADC) SDTI (DAC) BICK DSP Mode DSP Mode 16fs MSB justified MSB justified 32fs MSB justified MSB justified 32fs I2S compatible I2S compatible 32fs Table 16. Audio Interface Format Figure See Table 17 Figure 29 Figure 30 Figure 31
(default)
In Mode0 (DSP mode), the audio I/F timing is changed by BCKP and MSBS bits. When BCKP bit is "0", SDTO data is output by rising edge of BICK, SDTI data is latched by falling edge of BICK. When BCKP bit is "1", SDTO data is output by falling edge of BICK, SDTI data is latched by rising edge of BICK. MSB data position of SDTO and SDTI can be shifted by MSBS bit. The shifted period is a half of BICK. MSBS bit BCKP bit Audio Interface Format 0 0 Figure 32 0 1 Figure 33 1 0 Figure 34 1 1 Figure 35 Table 17. Audio Interface Format in Mode 0
(default)
If 16-bit data, the output of ADC, is converted to 8-bit data by removing LSB 8-bit, "-1" at 16bit data is converted to "-1" at 8-bit data. And when the DAC playbacks this 8-bit data, "-1" at 8-bit data will be converted to "-256" at 16-bit data and this is a large offset. This offset can be removed by adding the offset of "128" to 16-bit data before converting to 8-bit data.
FCK
0 1 2 3 8 9 10 11 12 13 14 15 0 1 2 3 8 9 10 11 12 13 14 15 0 1
BICK(32fs) SDTO(o) SDTI(i)
0
15 14 13 15 14 13
1 2 3
8
7 7
14
6 6
15
5 5
16
4 4
17
3 3
18
2 2
1 1
31
0 0
0 1 2 3 14
15 15
18 31 0 1
Don't Care
15 16 17
BICK(64fs) SDTO(o) SDTI(i)
15 14 13 2 1 0 15
Don't Care 15:MSB, 0:LSB Data
15 14
1
0
Don't Care
1/fs
Figure 29. Mode 1 Timing
Rev. 0.6 - 33 -
2007/10
[AK4635]
FCK
0 1 2 8 9 10 11 12 13 14 15 0 1 2 8 9 10 11 12 13 14 15 0 1
BICK(32fs) SDTO(o) SDTI(I)
0
15 14
8
7
6
5
4
3
2
1
0
15
15 14
1 2 3
8
7
14
6
15
5
16
4
17
3
18
2
1
31
0
0 1 2 3 14
Don't Care
14 15 16 17 18 31 0
15
1
BICK(64fs) SDTO(o) SDTI(i)
15 14 13 13 2 1 0 15
15 14 13
13 2
1
0
Don't Care
Don't Care
15
15:MSB, 0:LSB Data 1/fs
Figure 30. Mode 2 Timing
FCK
0 1 2 3 4 9 10 11 12 13 14 15 0 1 2 3 4 9 10 11 12 13 14 15 0 1
BICK(32fs) SDTO(o) SDTI(i)
0 1
15 14 13 15 14 13
2 3 4
7
7 7
14 15
6 6
16
5 5
17
4 4
18
3 3
2 2
31
1 1
0
0 0
1 2 3 4 14 15 16 17 18 31 0 1
BICK(64fs) SDTO(o) SDTI(i)
15 14 13 15 14 13 2 1 0
2
1
0
Don't Care
Don't Care
15:MSB, 0:LSB
Data 1/fs
Figure 31. Mode 3 Timing
Rev. 0.6 - 34 -
2007/10
[AK4635]
FCK
15 0 1 2 8 8 9 10 11 12 13 14 15 0 1 2 8 8 9 10 11 12 13 14 15 0
BICK(16fs) SDTO(o) SDTI(i)
15
0 0
15 14 15 14
8
8 8
7 7
6 6
5 5
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3 3
2 2
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15 14 15 14
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BICK(32fs) SDTO(o) SDTI(i)
15 14 15 14 8 2 2 1 1 0 0 15 14 15 14 8 8 2 2 1 1 0 0
Don't Care
Don't Care
1/fs 15:MSB, 0:LSB
1/fs
Figure 32. Mode 0 Timing (BCKP = "0", MSBS = "0")
FCK
15 0 1 2 8 8 9 10 11 12 13 14 15 0 1 2 8 8 9 10 11 12 13 14 15 0
BICK(16fs) SDTO(o) SDTI(i)
15
0 0
15 14 15 14
8
8 8
7 7
6 6
5 5
4 4
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2 2
1 1
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15 14 15 14
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0
BICK(32fs) SDTO(o) SDTI(i)
15 14 15 14 8 2 2 1 1 0 0 15 14 15 14 8 8 2 2 1 1 0 0
Don't Care
Don't Care
1/fs 15:MSB, 0:LSB
1/fs
Figure 33. Mode 0 Timing (BCKP = "1", MSBS = "0")
Rev. 0.6 - 35 -
2007/10
[AK4635]
FCK
15 0 1 2 8 8 9 10 11 12 13 14 15 0 1 2 8 8 9 10 11 12 13 14 15 0
BICK(16fs) SDTO(o) SDTI(i)
15
0 0
15 14 15 14
8
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
0 0
15 14 15 14
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0
BICK(32fs) SDTO(o) SDTI(i)
15 14 15 14 8 2 2 1 1 0 0 15 14 15 14 8 8 2 2 1 1 0 0
Don't Care
Don't Care
1/fs 15:MSB, 0:LSB
1/fs
Figure 34. Mode 0 Timing (BCKP = "0", MSBS = "1")
FCK
15 0 1 2 8 8 9 10 11 12 13 14 15 0 1 2 8 8 9 10 11 12 13 14 15 0
BICK(16fs) SDTO(o) SDTI(i)
15
0 0
15 14 15 14
8
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
0 0
15 14 15 14
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0
BICK(32fs) SDTO(o) SDTI(i)
15 14 15 14 8 2 2 1 1 0 0 15 14 15 14 8 8 2 2 1 1 0 0
Don't Care
Don't Care
1/fs 15:MSB, 0:LSB
1/fs
Figure 35. Mode 0 Timing (BCKP = "1", MSBS = "1")
Rev. 0.6 - 36 -
2007/10
[AK4635]
System Reset
When power-up, the PDN pin should be "L" and change to "H" after all power are supplied. "L" time of 150ns or more is needed to reset in the AK4635. The ADC enters an initialization cycle when the PMADC bit is changed from "0" to "1". The initialization cycle time is 1059/fs, or 133ms@fs = 8kHz. During the initialization cycle, the ADC digital data outputs of both channels are forced to a 2's compliment, "0". The ADC output reflects the analog input signal after the initialization cycle is complete. The DAC does not require an initialization cycle. (Note) Off-set occurs in the initial data depending on the conditions of a microphone and cut-off frequency of HPF. When Off-set becomes a problem, lengthen initialization time of ADC as ADRST bit = "0" or do not use initial output data of ADC. Init Cycle Cycle fs = 8kHz fs = 16kHz 1059/fs 132.4ms 66.2ms 291/fs 36.4ms 18.2ms Table 18 Initialization cycle of ADC
ADRST bit 0 1
fs = 48kHz 22.1ms 6.1ms
Thermal Shut Down
When the internal device temperature rises up irregularly (e.g. output pins of speaker amplifier are shortened), the AK4635 is powered down automatically and then THDET bit becomes "1". The powered-down speaker amplifier do not return to normal operation unless SPK-Amp blocks of the AK4635 are reset by the PDN pin "L". The device status can be monitored by THDET bit.
MIC/LINE Input Selector
The AK4646 has an input selector. When MDIF bit is "0", LIN bit selects MIC pin or LIN pin. When MDIF bit is "1", full-differential input is available. MDIF bit 0 0 1 LIN bit Input circuit Input pin 0 Single-End MIC pin 1 Single-End LIN pin x Differential MICP/MICN pin Table 19. Input Select (x: Don't care)
(default)
AK4635
MIC/MICP pin LIN bit
LIN/MICN pin MDIF bit
ADC
Figure 36 Input Selector
Rev. 0.6 - 37 -
2007/10
[AK4635]
MIC-Power MPI pin 1k MICP pin MICNpin MIC-Amp 1k A/D
AK4635
Audio HPF I/F
BICK pin FCK pin STDO pin
Figure 37. MIC Differential Input Circuit
MIC Gain Amplifier
The AK4635 has a Gain Amplifier for Microphone input. These gains are selected by the MGAIN3-0 bit. The typical input impedance is 30k. MGAIN3 bit 0 0 0 0 0 0 0 0 1 1 MGAIN2 bit MGAIN1 bit MGAIN0 bit 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 0 0 0 1 Others Table 20. Input Gain Input Gain 0dB +20dB +26dB +32dB +10dB +17dB +23dB +29dB +3dB +6dB N/A
(default)
MIC Power
The MPI pin supplies power for the Microphone. This output voltage is proportional to 0.8 x AVDD typically and the load resistance is minimum 2k. No capacitor must not be connected to the MPI pin, directly. (Figure 38)
AK4635 MPI pin 2k MIC pin A/D MIC-Amp HPF Audio I/F BICK pin FCK pin STDO pin MIC-Power
Figure 38. MIC Block Circuit
Rev. 0.6 - 38 -
2007/10
[AK4635]
Digital Block
The digital block consists of block diagram as shown in Figure 39. The AK4635 can choose various signal processing on a recording path or a playback path by setting ADCPF bit, PFDAC bit and PFSDO bit. (Figure 39 ~ Figure 42, Table 21)
PMADC bit
ADC
1st Order
SDTI
HPFAD bit
HPF
"1" "0" ADCPF bit PMPFIL bit HPF bit
1st Order
HPF
1st Order
LPF bit
LPF
5 Band
EQ5-1 bits
EQ ALC
(Volume)
"0"
"1" PFSDO bit PMDAC bit
"1"
"0" PFDAC bit
SDTO
DATT SMUTE DAC
(1) (2) (3) (4) (5) (6) (7) (8)
ADC: Include the Digital Filter (LPF) for ADC as shown in "FILTER CHRACTERISTICS". DAC: Include the Digital Filter (LPF) for DAC as shown in "FILTER CHRACTERISTICS". HPF: High Pass Filter. Applicable to use as Wind-Noise Reduction Filter. (See "Programmable Filter".) LPF: Low Pass Filter (See "Digital Programmable Filter".) 5-Band EQ: Applicable to use as Equalizer or Notch Filter. (See "Digital Programmable Filter".) ALC: Input Digital Volume with ALC function. (See "Input Digital Volume" and "ALC".) DATT: 4-step Digital Volume for recording path. (See "Digital Volume 2") SMUTE: Soft mute. (See "Soft Mute".) Figure 39. Digital Block Path Select
Rev. 0.6 - 39 -
2007/10
[AK4635]
Mode Recording Mode Reproduction Mode Loop Back Mode
ADCPF bit PFDAC bit PFSDO bit 1 0 1 0 1 0 1 1 1 Table 21 Recording Reproduction Mode
Figure Figure 40 Figure 41 Figure 42
ADC
2nd Order
1st Order
5 Band
HPF
LPF
EQ
ALC
(Volume)
DAC
SMUTE
DATT
Figure 40. Path at Recording Mode (default)
ADC
1st Order
HPF
DAC
SMUTE
EQ Figure 41. Path at Playback Mode
(Volume)
DATT
ALC
5 Band
1st Order
1st Order
LPF
HPF
ADC
2nd Order
1st Order
5 Band
HPF
LPF
EQ
ALC
(Volume)
DAC
SMUTE
DATT
Figure 42. Path at Recording & Playback Mode
Rev. 0.6 - 40 -
2007/10
[AK4635]
Digital Programmable Filter Circuit
The AK4635 has 2 steps of 1st order HPF, 1st order LPF and 5-band Equalizer built-in in a recording path and a playback path. (1) High Pass Filter (HPF)
Normally, this HPF is used as a Wind-Noise Reduction Filter. This is composed with 2 steps of 1st order HPF. The coefficient of both HPF is the same and set by F1A13-0 bits and F1B13-0 bits. HPFAD bit controls ON/OFF of the 1st step HPF and HPF bit controls ON/OFF of the 2nd step HPF. When the HPF is OFF, the audio data passes this block by 0dB gain. The coefficient should be set when HPFAD = HPF bits = "0" or PMADC = PMPFIL bits = "0". fs : Sampling frequency fc : Cut-off frequency Register setting (Note 38) HPF: F1A[13:0] bits = A, F1B[13:0] bits = B (MSB = F1A13, F1B13; LSB = F1A0, F1B0)
1 A= 1 + tan (fc/fs) , B= 1 + tan (fc/fs) 1- tan (fc/fs)
The cut-off frequency should be set as below. fc/fs 0.0001 (fc min = 1.6Hz at 16kHz) (2) Low Pass Filter(LPF) This is composed with 1st order LPF. F2A13-0 bits and F2B13-0 bits set the coefficient of LPF. LPF bit controls ON/OFF of the LPF. When the LPF is OFF, the audio data passes this block by 0dB gain. The coefficient should be set when LPF bit = "0" or PMPFIL bits = "0". fs : Sampling frequency fc : Cut-off frequency Register setting (Note 38) LPF: F2A[13:0] bits =A, F2B[13:0] bits =B (MSB=F2A13, F1B13; LSB=F2A0, F2B0)
1 A= 1 + 1 / tan (fc/fs) , B= 1 + 1 / tan (fc/fs) 1 - 1 / tan (fc/fs)
The cut-off frequency should be set as below. fc/fs 0.05 (fc min = 2205Hz at 44.1kHz)
Rev. 0.6 - 41 -
2007/10
[AK4635]
(3) 5-band Equalizer This block can be used as Equalizer or Notch Filter. ON/OFF 5-band Equalizer (EQ1, EQ2, EQ3, EQ4 and EQ5) can be controlled independently by EQ1, EQ2, EQ3, EQ4 and EQ5 bits. When Equalizer is OFF, the audio data passes this block by 0dB gain. E1A15-0, E1B15-0 and E1C15-0 bits set the coefficient of EQ1. E2A15-0, E2B15-0 and E2C15-0 bits set the coefficient of EQ2. E3A15-0, E3B15-0 and E3C15-0 bits set the coefficient of EQ3. E4A15-0, E4B15-0 and E4C15-0 bits set the coefficient of EQ4. E5A15-0, E5B15-0 and E5C15-0 bits set the coefficient of EQ5. fs : The Sampling frequency fo1 ~ fo5 : The Center frequency fb1 ~ fb5 : The Band width where the gain is 3dB different from center frequency K1 ~ K5 : The Gain ( -1 Kn < 3 ) Register setting (Note 38) EQ1: E1A[15:0] bits =A1, E1B[15:0] bits =B1, E1C[15:0] bits =C1 EQ2: E2A[15:0] bits =A2, E2B[15:0] bits =B2, E2C[15:0] bits =C2 EQ3: E3A[15:0] bits =A3, E3B[15:0] bits =B3, E3C[15:0] bits =C3 EQ4: E4A[15:0] bits =A4, E4B[15:0] bits =B4, E4C[15:0] bits =C4 EQ5: E5A[15:0] bits =A5, E5B[15:0] bits =B5, E5C[15:0] bits =C5 (MSB=E1A15, E1B15, E1C15, E2A15, E2B15, E2C15, E3A15, E3B15, E3C15, E4A15, E4B15, E4C15, E5A15, E5B15, E5C15 ; LSB= E1A0, E1B0, E1C0, E2A0, E2B0, E2C0, E3A0, E3B0, E3C0, E4A0, E4B0, E4C0, E5A0, E5B0, E5C0)
An = Kn x tan (fbn/fs) 1 + tan (fbn/fs) (n = 1, 2, 3, 4, 5) 2 , Bn = cos(2 fon/fs) x 1 + tan (fbn/fs) , Cn = 1 - tan (fbn/fs) 1 + tan (fbn/fs)
The center frequency should be set as below fon / fs < 0.497 When gain of K is set to "-1", the equalizer becomes notch filter. When it is used as notch filter, central frequency of a real notch filter deviates from the above-mentioned calculation, if its central frequency of each band is near. The control soft that is attached to the evaluation board has a function that revises a gap of frequency, and calculates the coefficient. When its central frequency of each band is near, revise the central frequency and confirm the frequency response. Note 38. [Translation the filter coefficient calculated by the equations above from real number to binary code (2's complement)] X = (Real number of filter coefficient calculated by the equations above) x 213 X should be rounded to integer, and then should be translated to binary code (2's complement). MSB of each filter coefficient setting register is sine bit.
Rev. 0.6 - 42 -
2007/10
[AK4635]
Input Digital Volume (Manual Mode)
When ADCPF bit = "1" and ALC1 bit = "0", ALC block becomes an input digital volume (manual mode). The digital volume's gain is set by IVOL7-0 bits as shown in Table 22. The IVOL value is changed at zero cross or zero cross time out. The zero crossing timeout period is set by ZTM1-0 bits.
IVOL7-0bits F1H F0H EFH : 92H 91H 90H : 2H 1H 0H
GAIN(0dB)
Step
+36.0 +35.625 +35.25 : 0.375dB +0.375 0.0 -0.375 : -53.625 -54.0 MUTE Table 22. Input Digital Volume Setting
(default)
When writing to the IVOL7-0 bits continually, the control register should be written in an interval more than zero crossing timeout. If not, zero crossing counter could be reset at each time and volume is not be changed. However, it could be ignored when writing the same register value as the last time. At this time, zero crossing counter has not been reset, so it should be written in an interval less than zero crossing timeout.
Rev. 0.6 - 43 -
2007/10
[AK4635]
Output Digital volume (Manual mode)
When ADCPF bit = "0" and ALC2 bit = "0", ALC block become an output digital volume (manual mode). The digital volume's gain is set by OVOL7-0 bits as shown in Table 23. The OVOL7-0 bits value are reflected to this output volume at zero cross or zero cross time out. The zero crossing timeout period is set by ZTM1-0 bits.
OVOL7-0bits F1H F0H EFH : 92H 91H 90H : 2H 1H 0H
GAIN(0dB)
Step
+36.0 +35.625 +35.25 : 0.375dB +0.375 0.0 -0.375 : -53.625 -54.0 MUTE Table 23 Output Digital Volume Setting
(default)
When writing to the OVOL7-0 bits continually, the control register should be written by an interval more than zero crossing timeout. If not, zero crossing counter could be reset at each time and volume is not be changed. However, It could be ignored when writing a same register value as the last time. At this time, zero crossing counter has not been reset, so it should be written by an interval less than zero crossing timeout.
Output Digital Volume2
AK4635 has 4 steps output volume in addition to the volume setting by OVOL7-0 bits. This volume is set by DATT1-0 bits as shown in Table 24. DATT1-0bits 0H 1H 2H 3H GAIN(0dB) Step 0.0 (default) 6.0dB -6.0 -12.0 -18.1 Table 24. Output Digital Volume2 Setting
Rev. 0.6 - 44 -
2007/10
[AK4635]
ALC Operation
ALC Operation works in ALC block. When ADCPF bit = "1", ALC operation is enable for recording path. When ADCPF bit = "0", ALC operation is enable for playback path. The ON/OFF of ALC operation for recording is controlled by ALC1 bit and the ON/OFF of ALC operation for playback is controlled by ALC2 bit. 1. ALC Limiter Operation
When the ALC limiter is enabled, and output exceeds the ALC limiter detection level (Table 25), the volume value is attenuated by the amount defined in LMAT1-0 bits (Table 26) automatically. When the ZELMN bit = "0" (zero crossing detection valid), the VOL value is changed by ALC limiter operation at the zero crossing point or zero crossing timeout. Zero crossing timeout period is set by ZTM1-0 bit that in common with ALC recovery zero crossing timeout period's setting (Table 27).At LFST bit = "1", VOL value is attenuated 1step immediately (period : 1/fs) when output Level is over FS(Digital Full Scale). When the ZELMN bit = "1" (zero crossing detection invalid), VOL value has been changed immediately (period: 1/fs) by ALC limiter operation. The attenuation for limiter operation is fixed to 1 step and not controlled by setting LMAT1-0 bits. After finishing the attenuation operation, if ALC bit does not change to "0", the operation repeats when the output signal level exceeds the ALC limiter detection level.
LMTH1 0 0 1 1
LMTH0 ALC Limiter Detection Level ALC Recovery Waiting Counter Reset Level 0 ALC Output -2.5dBFS -2.5dBFS > ALC Output -4.1dBFS 1 ALC Output -4.1dBFS -4.1dBFS > ALC Output -6.0dBFS 0 ALC Output -6.0dBFS -6.0dBFS > ALC Output -8.5dBFS 1 ALC Output -8.5dBFS -8.5dBFS > ALC Output -12dBFS Table 25. ALC Limiter Detection Level / Recovery Waiting Counter Reset Level ALC1 Limiter ATT Step LMAT1 0 0 1 1 LMAT0 0 1 0 1 ALC1 Output ALC1 Output LMTH FS ALC1 Output FS + 6dB ALC1 Output FS + 12dB 1 2 8 8
(default)
1 1 1 2 2 2 2 4 4 1 2 4 Table 26. ALC Limiter ATT Step Setting Zero Crossing Timeout Period 8kHz 16kHz 44.1kHz 128/fs 16ms 8ms 2.9ms 256/fs 32ms 16ms 5.8ms 512/fs 64ms 32ms 11.6ms 1024/fs 128ms 64ms 23.2ms Table 27. ALC Zero Crossing Timeout Period Setting
(default)
ZTM1 0 0 1 1
ZTM0 0 1 0 1
(default)
Rev. 0.6 - 45 -
2007/10
[AK4635]
2.
ALC Recovery Operation
The ALC recovery operation waits for the WTM2-0 bits (Table 28) to be set after completing the ALC limiter operation. If the input signal does not exceed "ALC recovery waiting counter reset level" (Table 25) during the wait time, the ALC recovery operation is executed. The VOL value is automatically incremented by RGAIN1-0 bits (Table 29) up to the set reference level (Table 30, Table 31) with zero crossing detection which timeout period is set by ZTM1-0 bits (Table 27). The ALC recovery operation is executed in a period set by WTM2-0 bits. For example, when the current VOL value is 30H and RGAIN1-0 bits are set to "01"(2 steps), VOL is changed to 32H by the auto limiter operation and then the input signal level is gained by 0.75dB (=0.375dB x 2). When the VOL value exceeds the reference level (IREF7-0 or OREF5-0), the VOL values are not increased. When "ALC recovery waiting counter reset level (LMTH1-0) Output Signal < ALC limiter detection level (LMTH1-0)" during the ALC recovery operation, the waiting timer of ALC recovery operation is reset. When "ALC recovery waiting counter reset level (LMTH1-0) > Output Signal", the waiting timer of ALC recovery operation starts. The ALC operation corresponds to the impulse noise. When the impulse noise is input, the ALC recovery operation becomes faster than a normal recovery operation. When large noise is input to microphone instantaneously, the quality of small level in the large noise can be improved by this fast recovery operation. The speed of first recovery operation is set by RFST1-0 bits (Table 32). WTM2 0 0 0 0 1 1 1 1 WTM1 0 0 1 1 0 0 1 1 WTM0 ALC Recovery Operation Waiting Period 8kHz 16kHz 44.1kHz 0 128/fs 16ms 8ms 2.9ms 1 256/fs 32ms 16ms 5.8ms 0 512/fs 64ms 32ms 11.6ms 1 1024/fs 128ms 64ms 23.2ms 0 2048/fs 256ms 128ms 46.4ms 1 4096/fs 512ms 256ms 92.9ms 0 8192/fs 1024ms 512ms 185.8ms 1 16384/fs 2048ms 1024ms 371.5ms Table 28. ALC Recovery Operation Waiting Period RGAIN0 GAIN STEP 0 1 0.375dB 1 2 0.750dB 0 3 1.125dB 1 4 1.500dB Table 29. ALC Recovery GAIN Step
(default)
RGAIN1 0 0 1 1
(default)
Rev. 0.6 - 46 -
2007/10
[AK4635]
IREF7-0bits
GAIN(0dB)
Step
F1H +36.0 F0H +35.625 EFH +35.25 : : C5H +19.5 (default) 0.375dB : : 92H +0.375 91H 0.0 90H -0.375 : : 2H -53.625 1H -54.0 0H MUTE Table 30. Reference Level at ALC Recovery operation for recoding OREF5-0bits GAIN(0dB) Step
3CH +36.0 3BH +34.5 3AH +33.0 : : 28H +6.0 (default) 1.5dB : : 25H +1.5 24H 0.0 23H -1.5 : : 2H -51.0 1H -52.5 0H -54.0 Table 31. Reference Level at ALC Recovery operation for playback
RFST1 bit RFST0 bit Recovery Speed 0 0 4 times (default) 0 1 8 times 1 0 16times 1 1 N/A Table 32. First Recovery Speed Setting (N/A: Not available)
Rev. 0.6 - 47 -
2007/10
[AK4635]
3.
The Volume at the ALC Operation
The current volume value at the ALC operation is reflected by VOL7-0 bits. It is enable to check the current volume value by reading the register value of VOL7-0 bits. This function is available only at the time of 3-wire mode. The volume value at the ALC operation can not be read in I2C mode. VOL7-0bits F1H F0H EFH : C5H : 92H 91H 90H : 2H 1H 0H GAIN(0dB) +36.0 +35.625 +35.25 : +19.5 : +0.375 0.0 -0.375 : -53.625 -54.0 MUTE
Table 33. Value of VOL7-0 bits 4. Example of the ALC Operation for Recording Operation
Table 34 shows the examples of the ALC setting for mic recording. Register Name LMTH1-0 ZELM ZTM1-0 WTM2-0 IREF7-0 IVOL7-0 LMAT1-0 LFST RGAIN1-0 ALC1 FRSL1-0 Comment fs=8kHz Operation -4.1dBFS Enable 16ms fs=16kHz Operation -4.1dBFS Enable 16ms 16ms 19.5dB 19.5dB 1step ON 1 step Enable 4times
Limiter detection Level Limiter zero crossing detection Zero crossing timeout period Recovery waiting period *WTM1-0 bits should be more than or 000 16ms equal to ZTM1-0 bits Maximum gain at recovery operation C5H 19.5dB Gain of IVOL C5H 19.5dB Limiter ATT step 00 1step Fast Limiter Operation 1 ON Recovery GAIN step 00 1 step ALC enable 1 Enable Speed of Fast Recovery 00 4 times Table 34. Example of the ALC Setting (Recording)
Data 01 0 00
Data 01 0 01 001 C5H C5H 00 1 00 1 00
Rev. 0.6 - 48 -
2007/10
[AK4635]
5. Example of ALC for Playback Operation Table 35 shows the example of the ALC setting for playback. Register Name LMTH1-0 ZELM ZTM1-0 WTM2-0 OREF5-0 OVOL7-0 LFST LMAT1-0 RGAIN1-0 ALC2 FRSL1-0 Comment fs=8kHz Operation -4.1dBFS Enable 16ms fs=16kHz Operation -4.1dBFS Enable 16ms 16ms +6dB 0dB ON 1step 1 step Enable 4 times
Limiter detection Level Limiter zero crossing detection Zero crossing timeout period Recovery waiting period *WTM1-0 bits should be more than or 000 16ms equal to ZTM1-0 bits Maximum gain at recovery operation 28 +6dB Gain of IVOL 91 0dB Fast Limiter Operation 1 ON Limiter ATT step 00 1step Recovery GAIN step 00 1 step ALC enable 1 Enable Speed of Fast Recovery 00 4 times Table 35. Examples of the ALC Setting (Play back)
Data 01 0 00
Data 01 0 01 001 28 91 1 00 00 1 00
Rev. 0.6 - 49 -
2007/10
[AK4635]
The following registers must not be changed during the ALC operation. These bits should be changed, after the ALC operation is finished by ALC1 bit = ALC2 bit = "0" or PMPFIL bit = "0". After ALC1 bit and ALC2 bit set to "0" or PMPFIL bit sets to "0", when ALC is restarted, the waiting time of zero crossing timeout is not needed. LMTH1-0, LMAT1-0, WTM2-0, ZTM1-0, RGAIN1-0, IREF7-0/OREF7-0, ZELM, RFST1-0, LFST
Example: Limiter = Zero crossing Enable Manual Mode Recovery Cycle = 16ms@8kHz Limiter and Recovery Step = 1 WR (ZTM1-0, WTM2-0) LFST = 1 Maximum Gain = +19.5dB WR (IREF7-0/OREF5-0) Limiter Detection Level = -4.1dBFS ALC1 bit = "1" WR (IVOL7-0/OVOL7-0) *1
(1) Addr=06H, Data=00H
WR (RGAIN1, LMTH1,RFST1-0) (2) Addr=08H, Data=C5H WR (LFST,LMAT1-0, RGAIN0, ZELMN, LMTH0) WR (ALC1= "1") *2 ALC Operation (4) Addr=0BH, Data=28H
(3) Addr=09H, Data=C5H
(5) Addr=07H, Data=A1H
Note : WR : Write *1: The value of volume at starting should be the same or smaller than REF's. *2: When setting ALC1 bit or ALC2 bit to "0", the operation is shifted to manual mode after passing the zero crossing time set by ZTM1-0 bits. Figure 43. Registers set-up sequence at the ALC operation
Rev. 0.6 - 50 -
2007/10
[AK4635]
SOFTMUTE
Soft mute operation is performed in the digital input domain. When the SMUTE bit changes to "1", the input signal is attenuated by - ("0") during the cycle of 245/fs (31msec@fs=8kHz). When the SMUTE bit is returned to "0", the mute is cancelled and the input attenuation gradually changes to 0dB during the cycle of 245/fs (31msec@fs=8kHz). If the soft mute is cancelled within the cycle of 245/fs (31msec@fs=8kHz), the attenuation is discontinued and returned to 0dB. The soft mute for Playback operation is effective for changing the signal source without stopping the signal transmission.
S M U T E bit
245/fs 245/fs
0dB A ttenuation
(1) (3)
-
GD (2) A nalog O utput GD
Figure 44. Soft Mute Function (1) The input signal is attenuated by - ("0") during the cycle of 245/fs (31msec@fs=8kHz). (2) Analog output corresponding to digital input has the group delay (GD). (3) If the soft mute is cancelled within the cycle of 245/fs (31msec@fs=8kHz), the attenuation is discounted and returned to 0dB within the same cycle.
Rev. 0.6 - 51 -
2007/10
[AK4635]
MONO LINE OUTPUT (AOUT pin)
A signal of DAC is output from the AOUT pin. When the DACA bit is "0", this output is OFF. When the LOVL bit is "1", this gain changes to +2dB. The load resistance is 10k(min). When PMAO bit is "0" and AOPSN bit is "0", the mono line output enters power-down and is pulled down by 100(typ). If PMAO bit is controlled at AOPS bit = "1", POP noise will be reduced at power-up and down. Then, this line should be pulled down by 20k of resister after C-coupling shown in Figure 45. This rising and falling time is max 300 ms at C = 1.0F . When PMAO bit is "1" and AOPS bit is "0", the mono line output enters power-up state. LOVL bits Gain 0 0dB (default) 1 +2dB Table 36. Mono line output volume setting
1F AOUT
220
20k
Figure 45. AOUT external circuit when using POP Reduction function
AOUT Control Sequence in case of using POP Reduction Circuit
(2 ) P M A O b it (1 ) A O P S b it (3 ) (4 ) (6 ) (5 )
A O U T p in 300 m s
N o r m a l O u tp u t 300 m s
Figure 46. Mono Line Output Control Sequence when using POP Reduction function (1) Set AOPS bit = "1". Mono line output enters the power-save mode. (2) Set PMAO bit = "1". Mono line output exits the power-down mode. AOUT pin rises up to VCOM voltage. Rise time is 200ms (max 300ms) at C=1F. (3) Set AOPS bit = "0" after AOUT pin rises up. Mono line output exits the power-save mode. Mono line output is enabled. (4) Set AOPS bit = "1". Mono line output enters power-save mode. (5) Set PMAO bit = "1". Mono line output enters power-down mode. AOUT pin falls down to VSS1. Fall time is 200ms (max 300ms) at C=1F. (6) Set AOPS bit = "0" after AOUT pin falls down. Mono line output exits the power-save mode.
Rev. 0.6 - 52 -
2007/10
[AK4635]
Speaker Output
AK4635 has a Mono Class-D Speaker-Amp. Power supply for Speaker-Amp(SVDD) can be set from 2.2V up to 4.0V. The Speaker is mono and BTL output, and can drive dynamic speaker and piezo speaker without LPF (filter-less). This speaker can output 400W@8 at SVDD = 3.3V, SPKG bit = "0". This gain is set by SPKG bit (Table 37). The output level of speaker amp is depended on voltage of SVDD and SPKG bit. SPKG bit Gain 0 0dB 1 +2dB (Note 39) Note 39. The signals more than -2dBFS clip. Table 37. SPK- Amp Gain The power up/down speaker amp is controlled by PMSPK bit. When PMSPK bit is "0", the SPP and SPN pins output VSS3 level. Also ON/OFF of speaker amp is controlled by SPOUTE bit. When SPOUTE bit is "0", the SPP and SPN pins are in VSS3-state forcibly. When the outputting from DAC to speaker, PMDAC bit should be set to "1". Follow the following sequence.
P M S P K b it
S P O U T E b it
S P P p in
N o r m a l O u tp u t
S P N p in
N o r m a l O u tp u t
Figure 47. Power-up/Power-down Timing for Speaker-Amp
Rev. 0.6 - 53 -
2007/10
[AK4635]

When a piezo speaker is used, resistances more than 10 should be connected between the SPP/SPN pins and speaker in series, respectively, as shown in Figure 48. Zener diodes should be connected between speaker and GND as shown in Figure 48, in order to protect SPK-Amp of the AK4635 from the power that is the piezo speaker output when the speaker is pressured. Zener diodes of the following Zener voltage should be used. 92% of SVDD Zener voltage of Zener diodo(ZD of Figure 48) SVDD+0.3V Ex) In case of SVDD = 3.8V :3.5V ZD 4.1V For example, Zener diode which Zener voltage is 3.9V(Min 3.7V, Max 4.1V) can be used.
ZD
SPK-Amp
SPP
10
SPN 10 ZD
Figure 48. Circuit of Speaker Output (using a piezo speaker)
Rev. 0.6 - 54 -
2007/10
[AK4635]
BEEP Generate
The AK4635 generates and output square wave from speaker amp. After outputting the signal during the time set by BPON6-0 bits, the AK4635 stops the output signal during the time set by BPOFF6-0 bits (Figure 50). The repeat count is set by BPTM6-0 bit, and the output level is set by BPLVL2-0 bits. When BPCNT bit is "0", if BPOUT bit is written "1", the AK4635 outputs the beep for the times of repeat count. When the output finish, BPOUT bit is set to "0" automatically. When BPCNT bit is set to "1", it outputs the beep in succession regardless of repeat count, on-time and off-time. < Setting parameter > 1) Output Frequency ( Table 38 ~ Table 40) 2) ON Time (Table 41) 3) OFF Time (Table 42) 4) Repeat Count (Table 43) 5) Output Level (Table 44) BPFR1-0, BPON7-0, BPOFF7-0, BPTM6-0 and BPLVL3-0 bits should be set when BPOUT =BPCNT = "0". BPCNT bit is given priority in BPOUT bit. When BPOUT bit be set to "1", if BPCNT bit is set to "0", BPOUT bit is set to "0" forcibly.
DATT2 SMUTE
DAC
Line Out Amp
Class-D SPK-Amp
BEEP Generator
LPF
Figure 49. BEEP signal output path
BEEP Output ON Time OFF Time Repeat Count
Figure 50. Beep output
Rev. 0.6 - 55 -
2007/10
[AK4635]
Output frequency of BEEP Generator [Hz] fs = 44.1kHz system fs = 48kHz system (Note 41) (Note 40) 00 4000 4009 (default) 01 2000 2005 10 1000 1002 11 N/A Note 40. Sampling frequency is 8kHz, 16kHz, 32kHz or 48kHz. Note 41. Sampling frequency is 11.025kHz, 22.05kHz or 44.1kHz. Table 38. Beep signal frequency (PLL Master/Slave Mode: reference clock: MCKI) (N/A: Not available) BPFR1-0 bit
Output frequency of BEEP Generator [Hz] BPFR1-0 bit FS3-2 bits = "00" FS3-2 bits = "01" FS3-2 bits = "10" 00 fs/2.75 fs/5.5 fs/11 (default) 01 fs/5.5 fs/11 fs/22 10 fs/11 fs/22 fs/44 11 N/A Table 39. Beep signal frequency ( PLL Slave Mode: reference clock : FCK/BICK) (N/A: Not available)
BPFR1-0 bit 00 01 10 11
Output frequency of BEEP Generator [Hz] FS1-0 bits = "01" FS1-0 bits = "10" FS1-0 bits = "11" fs/2.75 fs/55 fs/11 fs/5.5 fs/11 fs/22 fs/11 fs/22 fs/44 N/A Table 40. Beep signal frequency (EXT Slave/Master Mode) (N/A: Not available) FS1-0 bits = "00" fs/11 fs/22 fs/44
(default)
ON Time of BEEP Generator [msec] Step [msec] fs = 48kHz fs = 44.1kHz fs = 48kHz fs = 44.1kHz system system system system (Note 40) (Note 41) (Note 40) (Note 41) 0H 8.0 7.98 8.0 7.98 (default) 1H 16.0 15.86 2H 24.0 23.95 3H 32.0 31.93 4H 40.0 39.9 : : FDH 2032 2027.3 FEH 2040 2035.3 FFH 2048 2043.4 Note 40. Sampling frequency is 8kHz, 16kHz, 32kHz or 48kHz. Note 41. Sampling frequency is 11.025kHz, 22.05kHz or 44.1kHz. Table 41. Beep output ON-time (PLL Master/Slave Mode reference clock: MCKI) BPON7-0 bit
Rev. 0.6 - 56 -
2007/10
[AK4635]
OFF Time of BEEP Generator [msec] Step [msec] fs = 48kHz fs = 44.1kHz fs = 48kHz fs = 44.1kHz system system system system (Note 40) (Note 41) (Note 40) (Note 41) 0H 8.0 7.98 8.0 7.98 (default) 1H 16.0 15.86 2H 24.0 23.95 3H 32.0 31.93 4H 40.0 39.9 : : FDH 2032 2027.3 FEH 2040 2035.3 FFH 2048 2043.4 Note 40. Sampling frequency is 8kHz, 16kHz, 32kHz or 48kHz. Note 41. Sampling frequency is 11.025kHz, 22.05kHz or 44.1kHz. Table 42. Beep output OFF-time (PLL Master/Slave Mode reference clock: MCKI) BPOFF7-0 bit
BPTM6-0 bit Repeat Count 0H 1 (default) 1H 2 2H 3 3H : : 125 7DH 126 7EH 127 7FH 128 Table 43. Beep output Repeat Count
BPLVL3-0 bit .Beep Output Level STEP 0H 0dB (default) 1H -3dB 3dB 2H -6dB 3H -9dB 4H -12dB 5H -18dB 6dB 6H -24dB 7H -30dB Note 42. Power supply is 3.3V Note 43. Beep output amplitude as 0dB setting is 4.4Vpp@ load resistance = 8 + 10H, SVDD=3.3V Table 44. Beep output level
Rev. 0.6 - 57 -
2007/10
[AK4635]
Video Block
Video-Amp has a drivability for a load resistance of 150. The AK4635 has a composite input and output. A Low Pass Filter (LPF) and Gain Control Amp (GCA) are integrated and both DC output and Sag Compensation circuit are supported as shown in Figure 51 and Figure 52. The capacitance for Sag Compensation circuit is 100F+4.7F or 47F+4.7F. When DC output is used, the VOUT pin and the VSAG pin must be shorted. The output clamp voltage is 50 mV(typ) at DC output. SAGC bit should be set as shown in Table 45.VSAG2-0 bits should be set as shown in Table 46 at SAGC bit = "1". The gain can be set by VGCA4-0 bits. PMV bit controls the power up and down of the video block. The VOUT pin outputs VSS1 level at PMV bit = "0".
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB +6dB VOUT VSAG
C1
75
C2
(C1=100 F, C2=4.7 F) or (C1=47 F, C2=4.7 F) Figure 51 Video block (using Sag Compensation circuit)
VIN
CLAMP
LPF
GCA
-1dB ~ +10.5dB Step 0.5dB +6dB VOUT VSAG
75
Figure 52. Video block (at DC Output)
Rev. 0.6 - 58 -
2007/10
[AK4635]
SAGC bit 0 1
Output Method DC Output Sag Compensation circuit Table 45. Output method setting
(default)
VSAG2 bit VSAG1 bit VSAG0 bit External capacitance 0 1 1 C1 = 100F,C2 = 4.7F 1 0 1 C1 = 47F,C2 = 4.7F (default) Others N/A Table 46. Sag Compensation circuit setting (SACG bit = "1") (N/A: Not available)
VGCA4-0 bits 17H 16H 15H : 04H 03H 02H 01H 00H
GAIN(dB)
STEP
+10.5dB +10.0dB +9.5dB 0.5dB : +1.0dB +0.5dB 0.0dB -0.5dB -1.0dB Table 47. Video signal gain setting
(default)
Rev. 0.6 - 59 -
2007/10
[AK4635]
Serial Control Interface
(1) 3-wire Serial Control Mode (I2C pin = "L") Internal registers may be written and read by using the 3-wire P interface pins (CSN, CCLK and CDTIO). The data on this interface consists of Read/Write, Register address (MSB first, 7bits) and Control data (MSB first, 8bits). Address and data is clocked in on the rising edge of CCLK and data is clocked out on the falling edge. Data writing is valid on the rising edge of the 16th CCLK after the falling edge of CSN. CSN should be set to "H" every after a data writing for each address. In reading operation, the CDTIO pin changes to output mode at the falling edge of 8th CCLK and outputs D7-D0. The output finishes on the rising edge of CSN. However this reading function is available only at READ bit = "1". When READ bit = "0", the CDTIO pin stays as Hi-Z even after the falling edge of 8th CCLK. The CDTIO pin is placed in a Hi-Z state except outputting data at read operation mode. The clock speed of CCLK is 5MHz (max). The value of internal registers is initialized at the PDN pin = "L". Note 44. It is available for reading the address 00H ~ 11H, 20H ~ 24H and 30H. When reading the address 12H ~ 1FH, 25H ~ 2F and 31H ~ 4FH, the register values are invalid.
CSN
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Clock, "H" or "L" A6 A5 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 "H" or "L"
CCLK CDTIO
Clock, "H" or "L" "H" or "L"
R/W: A6-A0: D7-D0:
READ/WRITE ("1": WRITE, "0": READ) Register Address Control data
Figure 53. Serial Control I/F Timing
Rev. 0.6 - 60 -
2007/10
[AK4635] (2) I2C-bus Control Mode (I2C pin = "H") The AK4635 supports the fast-mode I2C-bus (max: 400kHz). Pull-up resistors at SDA and SCL pins should be connected to (DVDD+0.3)V or less voltage. (2)-1. WRITE Operations Figure 54 shows the data transfer sequence for the I2C-bus mode. All commands are preceded by a START condition. A HIGH to LOW transition on the SDA line while SCL is HIGH indicates a START condition (Figure 60). After the START condition, a slave address is sent. This address is 7 bits long followed by the eighth bit that is a data direction bit (R/W). The most significant seven bits of the slave address are fixed as "0010010" (Figure 55). If the slave address matches that of the AK4635, the AK4635 generates an acknowledge and the operation is executed. The master must generate the acknowledge-related clock pulse and release the SDA line (HIGH) during the acknowledge clock pulse (Figure 61). A R/W bit value of "1" indicates that the read operation is to be executed. A "0" indicates that the write operation is to be executed. The second byte consists of the control register address of the AK4635. The format is MSB first, and those most significant 1-bits are fixed to zeros (Figure 56). The data after the second byte contains control data. The format is MSB first, 8bits (Figure 57). The AK4635 generates an acknowledge after each byte is received. A data transfer is always terminated by a STOP condition generated by the master. A LOW to HIGH transition on the SDA line while SCL is HIGH defines a STOP condition (Figure 60). The AK4635 can perform more than one byte write operation per sequence. After receipt of the third byte the AK4635 generates an acknowledge and awaits the next data. The master can transmit more than one byte instead of terminating the write cycle after the first data byte is transferred. After receiving each data packet the internal 6-bit address counter is incremented by one, and the next data is automatically taken into the next address. If the address exceeds 4FH prior to generating a stop condition, the address counter will "roll over" to 00H and the previous data will be overwritten. The data on the SDA line must remain stable during the HIGH period of the clock. The HIGH or LOW state of the data line can only change when the clock signal on the SCL line is LOW (Figure 62) except for the START and STOP conditions.
S T A R T
R/W="0"
S T O P Sub Address(n) Data(n) A C K A C K Data(n+1) A C K A C K Data(n+x) A C K P
SDA
Slave S Address A C K
Figure 54. Data Transfer Sequence at the I2C-Bus Mode 0 0 1 0 0 1 0 R/W
Figure 55. The First Byte 0 A6 A5 A4 A3 A2 A1 A0
Figure 56. The Second Byte D7 D6 D5 D4 D3 D2 D1 D0
Figure 57. Byte Structure after the second byte
Rev. 0.6 - 61 -
2007/10
[AK4635]
(2)-2. READ Operations Set the R/W bit = "1" for READ operation of the AK4635. After transmission of data, the master can read the next address's data by generating an acknowledge instead of terminating the write cycle after the receipt of the first data word. After receiving each data packet the internal 6-bit address counter is incremented by one, and the next data is automatically taken into the next address. If the address exceeds 4FH prior to generating a stop condition, the address counter will "roll over" to 00H and the data of 00H will be read out. Note 44. It is available for reading the address 00H ~ 11H, 20H ~ 24H and 30H. When reading the address 12H ~ 1FH, 25H ~ 2F and 31H ~ 4FH, the register values are invalid. The AK4635 supports two basic read operations: CURRENT ADDRESS READ and RANDOM ADDRESS READ. (2)-2-1. CURRENT ADDRESS READ The AK4635 contains an internal address counter that maintains the address of the last word accessed, incremented by one. Therefore, if the last access (either a read or write) were to address n, the next CURRENT READ operation would access data from the address n+1. After receipt of the slave address with R/W bit "1", the AK4635 generates an acknowledge, transmits 1-byte of data to the address set by the internal address counter and increments the internal address counter by 1. If the master does not generate an acknowledge but instead generates a stop condition, the AK4635 ceases transmission.
S T A R T S T O P Data(n) A C K MA AC SK T E R Data(n+1) MA AC SK T E R Data(n+2) MA AC SK T E R MA AC SK T E R Data(n+x) MN AA SC T EK R P
R/W="1"
SDA
Slave S Address
Figure 58. CURRENT ADDRESS READ (2)-2-2. RANDOM ADDRESS READ The random read operation allows the master to access any memory location at random. Prior to issuing the slave address with the R/W bit "1", the master must first perform a "dummy" write operation. The master issues a start request, a slave address (R/W bit = "0") and then the register address to read. After the register address is acknowledged, the master immediately reissues the start request and the slave address with the R/W bit set to "1". The AK4635 then generates an acknowledge, 1 byte of data and increments the internal address counter by 1. If the master does not generate an acknowledge but instead generates a stop condition, the AK4635 ceases transmission.
S T A R T S T A R T Sub Address(n) A C K A C K S T O P Data(n) A C K MA AC SK T E R Data(n+1) MA AC S TK E R MA AC S TK E R Data(n+x) MN AA S TC EK R P
R/W="0"
R/W="1"
SDA
Slave S Address
Slave S Address
Figure 59. RANDOM ADDRESS READ
Rev. 0.6 - 62 -
2007/10
[AK4635]
SDA
SCL S start condition P stop condition
Figure 60. START and STOP Conditions
DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER acknowledge SCL FROM MASTER S clock pulse for acknowledgement
1
2
8
9
START CONDITION
Figure 61. Acknowledge on the I2C-Bus
SDA
SCL
data line stable; data valid
change of data allowed
Figure 62. Bit Transfer on the I2C-Bus
Rev. 0.6 - 63 -
2007/10
[AK4635]
Register Map
Addr 00H 01H 02H 03H 04H 05H 06H 07H 08H 09H 0AH 0BH 0CH 0DH 0EH 0FH 10H 11H 12H 13H 14H 15H 16H 17H 18H 19H 1AH 1BH 1CH 1DH 1EH 1FH 20H 21H 22H 23H 24H 25H 26H 27H 28H 29H 2AH 2BH 2CH 2DH 2EH 2FH Register Name Power Management 1 Power Management 2 Signal Select 1 Signal Select 2 Mode Control 1 Mode Control 2 Timer Select ALC Mode Control 1 ALC Mode Control 2 Digital Volume Control Digital Volume Control ALC Mode Control 3 Video Mode Control ALC LEVEL Signal Select 3 Thermal Shutdown Signal Select 4 Digital Filter Select 1 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved HPF Co-efficient 0 HPF Co-efficient 1 HPF Co-efficient 2 HPF Co-efficient 3 BEEP Frequency BEEP ON Time BEEP OFF Time BEEP Repeat Count BEEP VOL/Control Reserved Reserved Reserved Reserved Reserved Reserved Reserved LPF Co-efficient 0 LPF Co-efficient 1 LPF Co-efficient 2 LPF Co-efficient 3 D7 PMPFIL PMV SPOUTE PFSDO PLL3 ADRST 0 LFST IREF7 IVOL7 OVOL7 RGAIN1 0 VOL7 DATT1 THDET 0 0 0 0 0 0 0 0 0 0 0 0 F1A7 0 F1B7 0 BPCNT BPON7 BPOFF7 0 BPOUT 0 0 0 0 0 0 0 F2A7 0 F2B7 0 D6 PMVCM 0 0 AOPS PLL2 FCKO WTM2 ALC2 IREF6 IVOL6 OVOL6 LMTH1 0 VOL6 DATT0 0 LOVL 0 0 0 0 0 0 0 0 0 0 0 F1A6 0 F1B6 0 0 BPON6 BPOFF6 BPTM6 0 0 0 0 0 0 0 0 F2A6 0 F2B6 0 D5 0 0 DACS MGAIN1 PLL1 FS3 ZTM1 ALC1 IREF5 IVOL5 OVOL5 OREF5 SAGC VOL5 SMUTE 0 0 LPF 0 0 0 0 0 0 0 0 0 0 F1A5 F1A13 F1B5 F1B13 0 BPON5 BPOFF5 BPTM5 0 0 0 0 0 0 0 0 F2A5 F2A13 F2B5 F2B13 D4 PMSPK 0 DACA 0 PLL0 MSBS ZTM0 ZELMN IREF4 IVOL4 OVOL4 OREF4 VGCA4 VOL4 MDIF 0 0 HPF 0 0 0 0 0 0 0 0 0 0 F1A4 F1A12 F1B4 F1B12 0 BPON4 BPOFF4 BPTM4 0 0 0 0 0 0 0 0 F2A4 F2A12 F2B4 F2B12 D3 PMAO M/S MGAIN3 SPKG BCKO1 BCKP WTM1 LMAT1 IREF3 IVOL3 OVOL3 OREF3 VGCA3 VOL3 VSAG2 0 0 0 0 0 0 0 0 0 0 0 0 0 F1A3 F1A11 F1B3 F1B11 0 BPON3 BPOFF3 BPTM3 0 0 0 0 0 0 0 0 F2A3 F2A11 F2B3 F2B11 D2 PMDAC 0 PMMP 0 BCKO0 FS2 WTM0 LMAT0 IREF2 IVOL2 OVOL2 OREF2 VGCA2 VOL2 VSAG1 0 0 0 0 0 0 0 0 0 0 0 0 0 F1A2 F1A10 F1B2 F1B10 0 BPON2 BPOFF2 BPTM2 BPLVL2 0 0 0 0 0 0 0 F2A2 F2A10 F2B2 F2B10 D1 0 MCKO MGAIN2 PFDAC DIF1 FS1 RFST1 RGAIN0 IREF1 IVOL1 OVOL1 OREF1 VGCA1 VOL1 VSAG0 0 LIN 0 0 0 0 0 0 0 0 0 0 0 F1A1 F1A9 F1B1 F1B9 BPFR1 BPON1 BPOFF1 BPTM1 BPLVL1 0 0 0 0 0 0 0 F2A1 F2A9 F2B1 F2B9 D0 PMADC PMPLL MGAIN0 ADCPF DIF0 FS0 RFST0 LMTH0 IREF0 IVOL0 OVOL0 OREF0 VGCA0 VOL0 READ 0 0 HPFAD 0 0 0 0 0 0 0 0 0 0 F1A0 F1A8 F1B0 F1B8 BPFR0 BPON0 BPOFF0 BPTM0 BPLVL0 0 0 0 0 0 0 0 F2A0 F2A8 F2B0 F2B8
Rev. 0.6 - 64 -
2007/10
[AK4635]
Addr 30H 31H 32H 33H 34H 35H 36H 37H 38H 39H 3AH 3BH 3CH 3DH 3EH 3FH 40H 41H 42H 43H 44H 45H 46H 47H 48H 49H 4AH 4BH 4CH 4DH 4EH 4FH
Register Name Digital Filter Select 2 Reserved E1 Co-efficient 0 E1 Co-efficient 1 E1 Co-efficient 2 E1 Co-efficient 3 E1 Co-efficient 4 E1 Co-efficient 5 E2 Co-efficient 0 E2 Co-efficient 1 E2 Co-efficient 2 E2 Co-efficient 3 E2 Co-efficient 4 E2 Co-efficient 5 E3 Co-efficient 0 E3 Co-efficient 1 E3 Co-efficient 2 E3 Co-efficient 3 E3 Co-efficient 4 E3 Co-efficient 5 E4 Co-efficient 0 E4 Co-efficient 1 E4 Co-efficient 2 E4 Co-efficient 3 E4 Co-efficient 4 E4 Co-efficient 5 E5 Co-efficient 0 E5 Co-efficient 1 E5 Co-efficient 2 E5 Co-efficient 3 E5 Co-efficient 4 E5 Co-efficient 5
D7 0 0 E1A7 E1A15 E1B7 E1B15 E1C7 E1C15 E2A7 E2A15 E2B7 E2B15 E2C7 E2C15 E3A7 E3A15 E3B7 E3B15 E3C7 E3C15 E4A7 E4A15 E4B7 E4B15 E4C7 E4C15 E5A7 E5A15 E5B7 E5B15 E5C7 E5C15
D6 0 0 E1A6 E1A14 E1B6 E1B14 E1C6 E1C14 E2A6 E2A14 E2B6 E2B14 E2C6 E2C14 E3A6 E3A14 E3B6 E3B14 E3C6 E3C14 E4A6 E4A14 E4B6 E4B14 E4C6 E4C14 E5A6 E5A14 E5B6 E5B14 E5C6 E5C14
D5 0 0 E1A5 E1A13 E1B5 E1B13 E1C5 E1C13 E2A5 E2A13 E2B5 E2B13 E2C5 E2C13 E3A5 E3A13 E3B5 E3B13 E3C5 E3C13 E4A5 E4A13 E4B5 E4B13 E4C5 E4C13 E5A5 E5A13 E5B5 E5B13 E5C5 E5C13
D4 EQ5 0 E1A4 E1A12 E1B4 E1B12 E1C4 E1C12 E2A4 E2A12 E2B4 E2B12 E2C4 E2C12 E3A4 E3A12 E3B4 E3B12 E3C4 E3C12 E4A4 E4A12 E4B4 E4B12 E4C4 E4C12 E5A4 E5A12 E5B4 E5B12 E5C4 E5C12
D3 EQ4 0 E1A3 E1A11 E1B3 E1B11 E1C3 E1C11 E2A3 E2A11 E2B3 E2B11 E2C3 E2C11 E3A3 E3A11 E3B3 E3B11 E3C3 E3C11 E4A3 E4A11 E4B3 E4B11 E4C3 E4C11 E5A3 E5A11 E5B3 E5B11 E5C3 E5C11
D2 EQ3 0 E1A2 E1A10 E1B2 E1B10 E1C2 E1C10 E2A2 E2A10 E2B2 E2B10 E2C2 E2C10 E3A2 E3A10 E3B2 E3B10 E3C2 E3C10 E4A2 E4A10 E4B2 E4B10 E4C2 E4C10 E5A2 E5A10 E5B2 E5B10 E5C2 E5C10
D1 EQ2 0 E1A1 E1A9 E1B1 E1B9 E1C1 E1C9 E2A1 E2A9 E2B1 E2B9 E2C1 E2C9 E3A1 E3A9 E3B1 E3B9 E3C1 E3C9 E4A1 E4A9 E4B1 E4B9 E4C1 E4C9 E5A1 E5A9 E5B1 E5B9 E5C1 E5C9
D0 EQ1 0 E1A0 E1A8 E1B0 E1B8 E1C0 E1C8 E2A0 E2A8 E2B0 E2B8 E2C0 E2C8 E3A0 E3A8 E3B0 E3B8 E3C0 E3C8 E4A0 E4A8 E4B0 E4B8 E4C0 E4C8 E5A0 E5A8 E5B0 E5B8 E5C0 E5C8
The PDN pin = "L" resets the registers to their default values. Note 45. Unused bits must contain a "0" value. Note 46. Reading of address 12H ~ 1FH, 25H ~ 2FH and 31H ~ 4FH are not possible. Note 47. 0FH and 0DH are for address read only. However, 0DH address cannot be read at I2C -bus control mode. Writing access to 0DH and 0FH does not effect the operation.
Rev. 0.6 - 65 -
2007/10
[AK4635]
Register Definitions
Addr 00H Register Name Power Management 1 R/W Default D7 PMPFIL R/W 0 D6 PMVCM R/W 0 D5 0 R 0 D4 PMSPK R/W 0 D3 PMAO R/W 0 D2 PMDAC R/W 0 D1 0 R 0 D0 PMADC R/W 0
PMADC: ADC Block Power Control 0: Power down (default) 1: Power up When the PMADC bit changes from "0" to "1", the initialization cycle (1059/fs=133ms@8kHz) starts. After initializing, digital data of the ADC is output. PMDAC: DAC Block Power Control 0: Power down (default) 1: Power up PMAO: Mono Line Out Power Control 0: Power down (default) 1: Power up PMSPK: Speaker Block Power Control 0: Power down (default) 1: Power up PMVCM: VCOM Block Power Control 0: Power down (default) 1: Power up PMPFIL: Programmable Filter Block (HPF/ LPF/ 5-Band EQ/ ALC) Power Control 0: Power down (default) 1: Power up Each block can be powered-down respectively by writing "0" to each bit. When the PDN pin is "L", all blocks are powered-down. When PMPLL and MCKO bits and all bits in 00H address are "0", all blocks are powered-down. When any of the blocks are powered-up, the PMVCM bit must be set to "1". When PMPLL and MCKO bits and all bits in 00H address are "0", PMVCM bit can be "0". When any block of ADC, DAC, SPK, or Programmable digital filter is powered-up (PMADC bit = "1"or PMDAC bit = "1" or PMSPK bit = "1" PMPFIL bit = "1"), the clocks must always be present.
Rev. 0.6 - 66 -
2007/10
[AK4635]
Addr 01H
Register Name Power Management 2 R/W Default
D7 PMV R/W 0
D6 0 R 0
D5 0 R 0
D4 0 R 0
D3 M/S R/W 0
D2 0 R 0
D1 MCKO R/W 0
D0 PMPLL R/W 0
PMPLL: PLL Block Power Control Select 0: PLL is Power down and External is selected. (default) 1: PLL is Power up and PLL Mode is selected. MCKO: Master Clock Output Enable 0: "L" Output (default) 1: 256fs Output M/S: Select Master/ Slave Mode 0: Slave Mode (default) 1: Master Mode PMV: Video Block Power Control 0: Power down (default) 1: Power up
Addr 02H
Register Name Signal Select 1 R/W Default
D7 SPOUTE R/W 0
D6 0 R 0
D5 DACS R/W 0
D4 DACA R/W 0
D3 MGAIN3 R/W 0
D2 PMMP R/W 0
D1 MGAIN2 R/W 0
D0 MGAIN0 R/W 1
MGAIN3-2: MIC-amp Gain control (Table 20) MGAIN1 bit is located at D5 bit of 03H. Default: "0001" (+20.0dB) PMMP: MPI pin Power Control 0: Power down (default) 1: Power up When PMADC bit is "1", PMMP bit is enabled. DACA: Switch Control from DAC to mono line amp 0: OFF (default) 1: ON When PMAO bit is "1", DACA bit is enabled. When PMAO bit is "0", the AOUT pin goes VSS1. DACS: Switch Control from DAC to Speaker-Amp 0: OFF (default) 1: ON When DACS bit is "1", DAC output signal is input to Speaker-Amp. SPOUTE: Speaker output signal Enable 0: Disable (default) 1: Enable When SPOUTE bit is "0", the SPP and SPN pins output VSS3. When SPOUTE bit is "1", the SPP and SPN pins output signal.
Rev. 0.6 - 67 -
2007/10
[AK4635]
Addr 03H
Register Name Signal Select 2 R/W Default
D7 PFSDO R/W 1
D6 AOPS R/W 0
D5 MGAIN1 R/W 0
D4 0 R 0
D3 SPKG R/W 0
D2 0 R 0
D1 PFDAC R/W 0
D0 ADCPF R/W 1
ADCPF: Select of Input signal to Programmable Filter/ALC. 0: SDTI 1: Output of ADC (default) PFDAC: Select of Input signal to DAC. 0: SDTI (default) 1: Output of Programmable Filter/ALC SPKG: Select Speaker-Amp Output Gain 0: 0dB (default) 1: +2dB MGAIN1: Mic-Amplifier Gain Control (Table 20) MGAIN3-2 and MGAIN0 bits are D3, D2 and D0 of 02H. Default: "0001" (+20.0dB) AOPS: Mono Line Output Power-Save Mode 0: Normal Operation (default) 1: Power-Save Mode Power-save mode is enable at AOPS bit = "1". POP noise at power-up/down can be reduced by changing at PMAO bit = "1". (Figure 40) PFSDO: Select of signal from SDTO 0: Output of ADC (1st - HPF) 1: Output of Programmable Filter/ALC (default)
Addr 04H
Register Name Mode Control 1 R/W Default
D7 PLL3 R/W 0
D6 PLL2 R/W 0
D5 PLL1 R/W 0
D4 PLL0 R/W 0
D3 BCKO1 R/W 0
D2 BCKO0 R/W 0
D1 DIF1 R/W 1
D0 DIF0 R/W 0
DIF1-0: Audio Interface Format (Table 16) Default: "10" (MSB First) BCKO1-0: Select BICK output frequency at Master Mode (Table 9) Default: "00" (16fs) PLL3-0: Select input frequency at PLL mode (Table 4) Default: "0000" (FCK pin)
Rev. 0.6 - 68 -
2007/10
[AK4635]
Addr 05H
Register Name Mode Control 2 R/W Default
D7 ADRST R/W 0
D6 FCKO R/W 0
D5 FS3 R/W 0
D4 MSBS R/W 0
D3 BCKP R/W 0
D2 FS2 R/W 0
D1 FS1 R/W 0
D0 FS0 R/W 0
FS3-0: Setting of Sampling Frequency (Table 5 and Table 6) and MCKI Frequency (Table 11) These bits are selected to sampling frequency at PLL mode and MCKI frequency at EXT mode. Default: "0000" BCKP, MSBS: "00" (default) (Table 17) FCKO: Select FCK output frequency at Master Mode (Table 10) Default: "0" ADRST: Initialization cycle setting of ADC 0: 1059/fs (default) 1: 291/fs
Addr 06H
Register Name Timer Select R/W Default
D7 0 R 0
D6 WTM2 R/W 0
D5 ZTM1 R/W 0
D4 ZTM0 R/W 0
D3 WTM1 R/W 0
D2 WTM0 R/W 0
D1 RFST1 R/W 0
D0 RFST0 R/W 0
WTM2-0: ALC1 Recovery Waiting Period (Table 28) A period of recovery operation when any limiter operation does not occur during the ALC1 operation. Default is "000". ZTM1-0: ALC1, ALC2, IVOL and OVOL Zero crossing timeout Period (Table 27) The gain is changed by the manual volume controlling (ALC off) or the recovery operation (ALC on) only at Zero crossing or timeout. The default value is "00". RFST1-0 : ALC First recovery Speed (Table 32) Default: "00" (4times)
Rev. 0.6 - 69 -
2007/10
[AK4635]
Addr 07H
Register Name ALC Mode Control 1 R/W Default
D7 LFST R/W 0
D6 ALC2 R/W 0
D5 ALC1 R/W 0
D4 ZELMN R/W 0
D3 LMAT1 R/W 0
D2 LMAT0 R/W 0
D1 RGAIN0 R/W 0
D0 LMTH0 R/W 1
LMTH1-0: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level (Table 25) LMTH1 bit is located at D6 bit of 0BH. Default: "01" RGAIN1-0: ALC Recovery GAIN Step (Table 29) RGAIN1 bit is located at D7 bit of 0BH. Default: "00" LMAT1-0: ALC Limiter ATT Step (Table 26) Default: "00" ZELMN: Zero crossing detection enable at ALC Limiter operation 0: Enable (default) 1: Disable ALC1: ALC of recoding path Enable 0: Disable (default) 1: Enable ALC2: ALC2 of playback path Enable 0: Disable (default) 1: Enable LFST: Limiter function of ALC when the output was bigger than Fs. 0: The volume value is changed at zero crossing or timeout. (default) 1: When output of ALC is bigger than FS, VOL value is changed instantly.
Addr 08H
Register Name ALC Mode Control 2 R/W Default
D7 IREF7 R/W 1
D6 IREF6 R/W 1
D5 IREF5 R/W 0
D4 IREF4 R/W 0
D3 IREF3 R/W 0
D2 IREF2 R/W 1
D1 IREF1 R/W 0
D0 IREF0 R/W 1
IREF7-0: Reference value at ALC Recovery operation for recoding. (0.375dB step, 242 Level) (Table 30) Default: "C5H" (+19.5dB)
Rev. 0.6 - 70 -
2007/10
[AK4635]
Addr 09H
Register Name Input Digital Volume Control R/W Default
D7 IVOL7 R/W 1
D6 IVOL6 R/W 0
D5 IVOL5 R/W 0
D4 IVOL4 R/W 1
D3 IVOL3 R/W 0
D2 IVOL2 R/W 0
D1 IVOL1 R/W 0
D0 IVOL0 R/W 1
IVOL7-0: Input Digital Volume; 0.375dB step, 242 Level (Table 22) Default: "91H" (0.0dB)
Addr 0AH
Register Name Digital Volume Control R/W Default
D7 OVOL7 R/W 1
D6 OVOL6 R/W 0
D5 OVOL5 R/W 0
D4 OVOL4 R/W 1
D3 OVOL3 R/W 0
D2 OVOL2 R/W 0
D1 OVOL1 R/W 0
D0 OVOL0 R/W 1
OVOL7-0: Output Digital Volume; 0.375dB step, 242 Level (Table 23) Default: "91H" (0.0dB)
Addr 0BH
Register Name ALC Mode Control 3 R/W Default
D7 RGAIN1 R/W 0
D6 LMTH1 R/W 0
D5 OREF5 R/W 1
D4 OREF4 R/W 0
D3 OREF3 R/W 1
D2 OREF2 R/W 0
D1 OREF1 R/W 0
D0 OREF0 R/W 0
OREF5-0: Reference value at ALC Recovery operation for playback. 1.5dB step, 60 Level (Table 31) Default: "28H" (+6.0dB) LMTH1-0: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level Default: "01" (-4.1dBFS > ALC Output -6.0dBFS) RGAIN1-0: ALC Recovery GAIN Step (Table 29) RGAIN1 bit is located at D1 bit of 07H. Default: "00"
Addr 0CH
Register Name Video Mode Control R/W Default
D7 0 R/W 0
D6 0 R/W 0
D5 SAGC R/W 0
D4 VGCA4 R/W 0
D3 VGCA3 R/W 0
D2 VGCA2 R/W 0
D1 VGCA1 R/W 1
D0 VGCA0 R/W 0
VGCA4-0: Gain Control of Video output (Table 47) SAGC: Select Video Output method. (Table 45)
Addr 0DH
Register Name Input Digital Volume Control R/W Default
D7 VOL7 R -
D6 VOL6 R -
D5 VOL5 R -
D4 VOL4 R -
D3 VOL3 R -
D2 VOL2 R -
D1 VOL1 R -
D0 VOL0 R -
VOL7-0: The current volume of ALC; 0.375dB step, 242 Level, Read only (Table 33)
Rev. 0.6 - 71 -
2007/10
[AK4635]
Addr 0EH
Register Name Mode Control 3 R/W Default
D7 DATT1 R/W 0
D6 DATT0 R/W 0
D5 SMUTE R/W 0
D4 MDIF R/W 0
D3 VSAG2 R/W 1
D2 VSAG1 R/W 0
D1 VSAG0 R/W 1
D0 READ R/W 0
READ: Read function Enable 0: Disable (default) 1: Enable VSAG2-0: Select common level of Video-amp at Sag Compensation mode (SAGC = "1"). (Table 46) Default: "101" MDIF: Single-ended / Full-differential Input Select 0: Single-ended input (MIC pin or LIN pin: Default) 1: Full-differential input (MICP and MICN pins) SMUTE: Soft Mute Control 0: Normal Operation (default) 1: DAC outputs soft-muted DATT1-0: Output Digital Volume2; 6dB step, 4 Level (Table 24) Default: "00H" (0.0dB)
Addr 0FH
Register Name Thermal Shutdown R/W Default
D7 THDET R 0
D6 0 R 0
D5 0 R 0
D4 0 R 0
D3 0 R 0
D2 0 R 0
D1 0 R 0
D0 0 R 0
THDET: Thermal Shutdown Detection 0: Normal Operation (default) 1: Thermal Shutdown
Addr 10H
Register Name Signal Select 4 R/W Default
D7 0 R 0
D6 LOVL R/W 0
D5 0 R 0
D4 0 R 0
D3 0 R 0
D2 0 R 0
D1 LIN R/W 0
D0 0 R 0
LIN: Select Input data of ADC 0: MIC pin (default) 1: LIN pin LOVL: Lineout Gain Setting 0: 0dB(default) 1: +2dB
Rev. 0.6 - 72 -
2007/10
[AK4635]
Addr 11H
Register Name Digital Filter Select 1 R/W Default
D7 0 R 0
D6 0 R 0
D5 LPF R/W 0
D4 HPF R/W 1
D3 0 R 0
D2 0 R 0
D1 0 R 0
D0 HPFAD R/W 1
HPFAD: HPF Enable in ADC block 0: Disable 1: Enable (default) When HPFAD bit is "0", HPFAD block is bypassed (0dB). When HPFAD bit is "1", F1A13-0, F1B13-0 bits are enabled. HPFAD bit should be "1"at PMADC bit = "1". HPF: HPF Enable in Filter block. 0: Disable 1: Enable (default) When HPF bit is "0", HPF block is bypassed (0dB). When HPF bit is "1", F1A13-0, F1B13-0 bits are enabled. LPF: LPF Coefficient Setting Enable 0: Disable (default) 1: Enable When LPF bit is "0", LPF block is bypassed (0dB). When LPF bit is "1", F2A13-0, F2B13-0 bits are enabled.
Addr 1CH 1DH 1EH 1FH
Register Name HPF Co-efficient 0 HPF Co-efficient 1 HPF Co-efficient 2 HPF Co-efficient 3 R/W Default
D7 F1A7 0 F1B7 0 W
D6 F1A6 0 F1B6 0 W
D5 D4 D3 D2 F1A5 F1A4 F1A3 F1A2 F1A13 F1A12 F1A11 F1A10 F1B5 F1B4 F1B3 F1B2 F1B13 F1B12 F1B11 F1B10 W W W W F1A13-0 bits = 0x1F16, F1B13-0 bits = 0x1E2B
D1 F1A1 F1A9 F1B1 F1B9 W
D0 F1A0 F1A8 F1B0 F1B8 W
F1A13-0, F1B13-0: FIL1 (Wind-noise Reduction Filter) Coefficient (14bit x 2) Default: F1A13-0 bits = 0x1F16, F1B13-0 bits = 0x1E2B fc = 75Hz@fs = 8kHz, 150Hz@fs = 16kHz
Addr 20H
Register Name BEEP Frequency R/W Default
D7 BPCNT R/W 0
D6 0 R 0
D5 0 R 0
D4 0 R 0
D3 0 R 0
D2 0 R 0
D1 BPFR1 R/W 0
D0 BPFR0 R/W 0
BPFR1-0: BEEP Signal Output Frequency Setting (Table 38 ~ Table 40) Default: "00" BPCNT: BEEP Signal Output Mode Setting 0: Once Output Mode (default) 1: Continuous Mode In continuous mode, the BEEP signal is output while BPCNT bit is "1". In once output mode, the BEEP signal is output by only the frequency set with BPTM6-0 bits.
Rev. 0.6 - 73 -
2007/10
[AK4635]
Addr 21H
Register Name BEEP ON Time R/W Default
D7 BPON7 R/W 0
D6 BPON6 R/W 0
D5 BPON5 R/W 0
D4 BPON4 R/W 0
D3 BPON3 R/W 0
D2 BPON2 R/W 0
D1 BPON1 R/W 0
D0 BPON0 R/W 0
BPON7-0: Setting ON-time of BEEP signal output (Table 41) Default: "00H"
Addr 22H
Register Name BEEP OFF Time R/W Default
D7 BPOFF7 R/W 0
D6 BPOFF6 R/W 0
D5 BPOFF5 R/W 0
D4 BPOFF4 R/W 0
D3 BPOFF3 R/W 0
D2 BPOFF2 R/W 0
D1 BPOFF1 R/W 0
D0 BPOFF0 R/W 0
BPOFF7-0: Setting OFF-time of BEEP signal output (Table 42) Default: "00H"
Addr 23H
Register Name BEEP Repeat Count R/W Default
D7 0 R 0
D6 BPTM6 R/W 0
D5 BPTM5 R/W 0
D4 BPTM4 R/W 0
D3 BPTM3 R/W 0
D2 BPTM2 R/W 0
D1 BPTM1 R/W 0
D0 BPTM0 R/W 0
BPTM6-0: Setting the number of times that BEEP signal repeats (Table 43) Default: "00H"
Addr 24H
Register Name BEEP VOL/Control R/W Default
D7 BPOUT R/W 0
D6 0 R 0
D5 0 R 0
D4 0 R 0
D3 0 R 0
D2 BPLVL2 R/W 0
D1 BPLVL1 R/W 0
D0 BPLVL0 R/W 0
BPLVL2-0: Setting Output Level of BEEP signal (Table 44) Default: "0H" (0dB) BPOUT: BEEP Signal Control 0: OFF (default) 1: ON At the time of BPCNT = "0", when BPOUT bit is "1", the beep signal starts outputting. The Beep signal stops after the number of times that was set in BPTM6-0 bit, and BPOUT bit is set to "0" automatically.
Rev. 0.6 - 74 -
2007/10
[AK4635]
Addr 2CH 2DH 2EH 2FH
Register Name LPF Co-efficient 0 LPF Co-efficient 1 LPF Co-efficient 2 LPF Co-efficient 3 R/W Default
D7 F2A7 0 F2B7 0 W 0
D6 F2A6 0 F2B6 0 W 0
D5 F2A5 F2A13 F2B5 F2B13 W 0
D4 F2A4 F2A12 F2B4 F2B12 W 0
D3 F2A3 F2A11 F2B3 F2B11 W 0
D2 F2A2 F2A10 F2B2 F2B10 W 0
D1 F2A1 F2A9 F2B1 F2B9 W 0
D0 F2A0 F2A8 F2B0 F2B8 W 0
F2A13-0, F2B13-0: LPF Coefficient (14bit x 2) Default: "0000H"
Addr 30H
Register Name Digital Filter Select 2 R/W Default
D7 0 R 0
D6 0 R 0
D5 0 R 0
D4 EQ5 R/W 0
D3 EQ4 R/W 0
D2 EQ3 R/W 0
D1 EQ2 R/W 0
D0 EQ1 R/W 0
EQ1: Equalizer 1 Coefficient Setting Enable 0: Disable (default) 1: Enable When EQ1 bit is "1", E1A15-0, E1B15-0, E1C15-0 bits are enabled. When EQ1 bit is "0", EQ block is through (0dB). EQ2: Equalizer 2 Coefficient Setting Enable 0: Disable (default) 1: Enable When EQ2 bit is "1", E2A15-0, E2B15-0, E2C15-0 bits are enabled. When EQ2 bit is "0", EQ block is through (0dB). EQ3: Equalizer 3 Coefficient Setting Enable 0: Disable (default) 1: Enable When EQ3 bit is "1", E3A15-0, E3B15-0, E3C15-0 bits are enabled. When EQ3bit is "0", EQ block is through (0dB). EQ4: Equalizer 4 Coefficient Setting Enable 0: Disable (default) 1: Enable When EQ4 bit is "1", E4A15-0, E4B15-0, E4C15-0 bits are enabled. When EQ4 bit is "0", EQ block is through (0dB). EQ5: Equalizer 5 Coefficient Setting Enable 0: Disable (default) 1: Enable When EQ5 bit is "1", E5A15-0, E5B15-0, E5C15-0 bits are enabled. When EQ5 bit is "0", EQ block is through (0dB).
Rev. 0.6 - 75 -
2007/10
[AK4635]
Addr 32H 33H 34H 35H 36H 37H 38H 39H 3AH 3BH 3CH 3DH 3EH 3FH 40H 41H 42H 43H 44H 45H 46H 47H 48H 49H 4AH 4BH 4CH 4DH 4EH 4FH
Register Name E1 Co-efficient 0 E1 Co-efficient 1 E1 Co-efficient 2 E1 Co-efficient 3 E1 Co-efficient 4 E1 Co-efficient 5 E2 Co-efficient 0 E2 Co-efficient 1 E2 Co-efficient 2 E2 Co-efficient 3 E2 Co-efficient 4 E2 Co-efficient 5 E3 Co-efficient 0 E3 Co-efficient 1 E3 Co-efficient 2 E3 Co-efficient 3 E3 Co-efficient 4 E3 Co-efficient 5 E4 Co-efficient 0 E4 Co-efficient 1 E4 Co-efficient 2 E4 Co-efficient 3 E4 Co-efficient 4 E4 Co-efficient 5 E5 Co-efficient 0 E5 Co-efficient 1 E5 Co-efficient 2 E5 Co-efficient 3 E5 Co-efficient 4 E5 Co-efficient 5 R/W Default
D7 E1A7 E1A15 E1B7 E1B15 E1C7 E1C15 E2A7 E2A15 E2B7 E2B15 E2C7 E2C15 E3A7 E3A15 E3B7 E3B15 E3C7 E3C15 E4A7 E4A15 E4B7 E4B15 E4C7 E4C15 E5A7 E5A15 E5B7 E5B15 E5C7 E5C15 W 0
D6 E1A6 E1A14 E1B6 E1B14 E1C6 E1C14 E2A6 E2A14 E2B6 E2B14 E2C6 E2C14 E3A6 E3A14 E3B6 E3B14 E3C6 E3C14 E4A6 E4A14 E4B6 E4B14 E4C6 E4C14 E5A6 E5A14 E5B6 E5B14 E5C6 E5C14 W 0
D5 E1A5 E1A13 E1B5 E1B13 E1C5 E1C13 E2A5 E2A13 E2B5 E2B13 E2C5 E2C13 E3A5 E3A13 E3B5 E3B13 E3C5 E3C13 E4A5 E4A13 E4B5 E4B13 E4C5 E4C13 E5A5 E5A13 E5B5 E5B13 E5C5 E5C13 W 0
D4 E1A4 E1A12 E1B4 E1B12 E1C4 E1C12 E2A4 E2A12 E2B4 E2B12 E2C4 E2C12 E3A4 E3A12 E3B4 E3B12 E3C4 E3C12 E4A4 E4A12 E4B4 E4B12 E4C4 E4C12 E5A4 E5A12 E5B4 E5B12 E5C4 E5C12 W 0
D3 E1A3 E1A11 E1B3 E1B11 E1C3 E1C11 E2A3 E2A11 E2B3 E2B11 E2C3 E2C11 E3A3 E3A11 E3B3 E3B11 E3C3 E3C11 E4A3 E4A11 E4B3 E4B11 E4C3 E4C11 E5A3 E5A11 E5B3 E5B11 E5C3 E5C11 W 0
D2 E1A2 E1A10 E1B2 E1B10 E1C2 E1C10 E2A2 E2A10 E2B2 E2B10 E2C2 E2C10 E3A2 E3A10 E3B2 E3B10 E3C2 E3C10 E4A2 E4A10 E4B2 E4B10 E4C2 E4C10 E5A2 E5A10 E5B2 E5B10 E5C2 E5C10 W 0
D1 E1A1 E1A9 E1B1 E1B9 E1C1 E1C9 E2A1 E2A9 E2B1 E2B9 E2C1 E2C9 E3A1 E3A9 E3B1 E3B9 E3C1 E3C9 E4A1 E4A9 E4B1 E4B9 E4C1 E4C9 E5A1 E5A9 E5B1 E5B9 E5C1 E5C9 W 0
D0 E1A0 E1A8 E1B0 E1B8 E1C0 E1C8 E2A0 E2A8 E2B0 E2B8 E2C0 E2C8 E3A0 E3A8 E3B0 E3B8 E3C0 E3C8 E4A0 E4A8 E4B0 E4B8 E4C0 E4C8 E5A0 E5A8 E5B0 E5B8 E5C0 E5C8 W 0
E1A15-0, E1B15-0, E1C15-0: Equalizer 1 Coefficient (16bit x3) Default: "0000H" E2A15-0, E2B15-0, E2C15-0: Equalizer 2 Coefficient (16bit x3) Default: "0000H" E3A15-0, E3B15-0, E3C15-0: Equalizer 3 Coefficient (16bit x3) Default: "0000H" E4A15-0, E4B15-0, E4C15-0: Equalizer 4 Coefficient (16bit x3) Default: "0000H" E5A15-0, E5B15-0, E5C15-0: Equalizer 5 Coefficient (16bit x3) Default: "0000H"
Rev. 0.6 - 76 -
2007/10
[AK4635]
SYSTEM DESIGN
Figure 63 and Figure 64 show the system connection diagram. The evaluation board [AKD4635] demonstrates the optimum layout, power supply arrangements and measurement results. < MIC Single-end Input >
Dynamic SPK R1, R2: Short ZD1, ZD2: Open Piezo SPK R1, R2: 10 ZD1, ZD2: Required
0.1 10 0.1
R1
Speaker
R2
I2C DVDD VSS2 VSS3 NC
ZD2
ZD1
SDTO
MCKO
SPN
SVDD
SPP
1 1
220
DSP & P
FCK CCLK CDTI MPI MIC BICK SDTI MCKI AOUT LIN
2.2k
20 k
Top View
1 0.1
PDN CSN VOUT VCOM VCOC
+
2.2
Rp
Cp
Cs
VSAG VSS1 AVDD VIN
0.1
Cv + 75
0.1
Analog Supply 2.83.6V
10
+
Figure 63. Typical Connection Diagram Notes: - VSS1, VSS2 and VSS3 of the AK4635 should be distributed separately from the ground of external controllers. - All digital input pins except pull-down pin should not be left floating. - In EXT mode (PMPLL bit = "0"), Rp and Cp of the VCOC pin can be open. - In PLL mode (PMPLL bit = "1"), Rp and Cp of the VCOC pin should be connected as shown in Table 48. - When the AK4635 is used at master mode, FCK and BICK pins are floating before M/S bit is changed to "1". Therefore, a pull-up resistor with around 100 should be connected to LRCK and BICK pins of the AK4635. -When AVDD, DVDD and SVDD were distributed, DVDD = 1.6 ~ 3.6 V, SVDD = 2.2 ~ 4.0 V.
Rev. 0.6 - 77 -
2007/10
[AK4635]
< MIC differential Input >
0.1 10 0.1
Dynamic SPK R1, R2: Short ZD1, ZD2: Open Piezo SPK R1, R2: 10 ZD1, ZD2: Required
R1
Speaker
R2
I2C DVDD VSS2 VSS3 NC
ZD2
ZD1
SDTO
MCKO
SPN
SVDD
SPP
1 1
220
DSP & P
FCK CCLK CDTI MPI MICP BICK SDTI MCKI AOUT MICN
1k
Top View
1
1k
20 k
0.1
PDN CSN VOUT VCOM VCOC
+
2.2
Rp
Cp
Cs
VSAG VSS1 AVDD VIN
0.1
Cv + 75
0.1
Analog Supply 2.83.6V
10
+
Figure 64. Typical Connection Diagram Notes: - VSS1, VSS2 and VSS3 of the AK4635 should be distributed separately from the ground of external controllers. - All digital input pins except pull-down pin should not be left floating. - In EXT mode (PMPLL bit = "0"), Rp and Cp of the VCOC pin can be open. - In PLL mode (PMPLL bit = "1"), Rp and Cp of the VCOC pin should be connected as shown in Table 48. - When the AK4635 is used at master mode, FCK and BICK pins are floating before M/S bit is changed to "1". Therefore, a pull-up resistor with around 100 should be connected to LRCK and BICK pins of the AK4635. -When AVDD, DVDD and SVDD were distributed, DVDD = 1.6 ~ 3.6 V, SVDD = 2.2 ~ 4.0 V. Rp and Cp of VCOC pin Rp[] Cp[F ] 6.8k 220n 10k 4.7n 10k 4.7n 10k 4.7n 10k 4.7n 10k 4.7n 10k 10n 10k 10n PLL Lock Time (max)
Mode
PLL3 bit 0 0 0 0 0 0 1 1
PLL2 bit 0 0 0 0 1 1 1 1
PLL1 bit 0 0 1 1 1 1 0 0
PLL0 bit 0 1 0 1 0 1 0 1
PLL Reference Clock Input Pin
Input Frequency
0 1 2 3 6 7 12 13
Others
FCK pin 1fs 160ms BICK pin 16fs 2ms BICK pin 32fs 2ms BICK pin 64fs 2ms MCKI pin 12MHz 30ms MCKI pin 24MHz 30ms MCKI pin 13.5MHz 30ms MCKI pin 27MHz 30ms Others N/A Table 48. Setting of PLL Mode (*fs: Sampling Frequency, N/A: Not available)
(default)
Rev. 0.6 - 78 -
2007/10
[AK4635]
1. Grounding and Power Supply Decoupling
The AK4635 requires careful attention to power supply and grounding arrangements. AVDD, DVDD and SVDD are usually supplied from the system's analog supply. If AVDD, DVDD and SVDD are supplied separately, the correct power up sequence should be observeVSS21, VSS2 and VSS3 of the AK4635 should be connected to the analog ground plane. System analog ground and digital ground should be connected together near to where the supplies are brought onto the printed circuit board. Decoupling capacitors should be as near to the AK4635 as possible, with the small value ceramic capacitor being the nearest.
2. Voltage Reference
VCOM is a signal ground of this chip. A 2.2F electrolytic capacitor in parallel with a 0.1F ceramic capacitor attached to the VCOM pin eliminates the effects of high frequency noise. No load current may be drawn from the VCOM pin. All signals, especially clocks, should be kept away from the VCOM pin in order to avoid unwanted coupling into the AK4635.
3. Analog Inputs
The Mic and Line inputs supports single-ended and differential. The input signal range scales with nominally at 0.06 x AVDD Vpp for the Mic input and 0.6 x AVDD Vpp for the Beep input, centered around the internal common voltage (approx. 0.45 x AVDD). Usually the input signal is AC coupled using a capacitor. The cut-off frequency is fc = (1/2RC). The AK4635 can accept input voltages from VSS1 to AVDD.
4. Analog Outputs
The input data format for the DAC is 2's complement. The output voltage is a positive full scale for 7FFFH(@16bit) and a negative full scale for 8000H(@16bit). Mono Line Output from the AOUT pin is centered at 0.45 x AVDD (typ).
Rev. 0.6 - 79 -
2007/10
[AK4635]
PACKAGE
29pin WL-CSP: 2.5mm x 3.0mm
Top View 2.5 0.1 Bottom View
A
0.5
6 5 4 3 2 1 A B C D E
6 5
4635
XXXX
B 3.0 0.1 4 3 2 1 E D C B A 0.05
0.3 0.05
M S AB
S 0.85
0.25
0.08 S
Rev. 0.6 - 80 -
2007/10
[AK4635]
MARKING
4635
XXXX
1 A
XXXX: Date code identifier (4 digits)
IMPORTANT NOTICE These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei EMD Corporation (AKEMD) or authorized distributors as to current status of the products. AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any information contained herein. Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), and AKEMD assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKEMD. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKEMD harmless from any and all claims arising from the use of said product in the absence of such notification.
Rev. 0.6 - 81 -
2007/10

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