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[AK4705]
AK4705
2ch 24bit DAC with AV SCART Switch
GENERAL DESCRIPTION The AK4705 offers the ideal features for digital set-top-box systems. Using AKM's multi-bit architecture for its modulator, the AK4705 delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4705 integrates a combination of SCF and CTF filters, removing the need for high cost external filters and increasing performance for systems with excessive clock jitter. The AK4705 also including the audio switches, volumes, video switches, video filters, etc. designed primarily for digital set-top-box systems. The AK4705 is offered in a space saving 48-pin LQFP package. FEATURES DAC Sampling Rates Ranging from 32kHz to 50kHz 64dB High Attenuation 8x FIR Digital Filter 2nd Order Analog LPF On Chip Buffer with Single-Ended Output Digital De-Emphasis for 32k, 44.1k and 48kHz Sampling I/F Format: 24bit MSB Justified, I2S, 18/16bit LSB Justified Master Clock: 256fs, 384fs High Tolerance to Clock Jitter Analog Switches for SCART Audio Section THD+N: -86dB (@2Vrms) Dynamic Range: 96dB (@2Vrms) Stereo Analog Volume with Pop-noise Free Circuit (+6dB to -60dB & Mute) Analog Inputs Two Stereo Inputs (TV&VCR SCART) One Stereo Input (Changeover to Internal DAC) Analog Outputs Two Stereo Outputs (TV, VCR SCART) One Mono Output (Modulator) Pop Noise Free Circuit for Power On/Off Video Section Integrated LPF: -40dB@27MHz 75ohm Driver 6dB Gain for Outputs Adjustable Gain Four CVBS/Y Inputs (ENCx2, TV, VCR), Three CVBS/Y Outputs (RF, TV, VCR) Three R/C Inputs (ENCx2, VCR), Two R/C outputs (TV, VCR) Bi-Directional Control for VCR-Red/Chroma Two G and B Inputs (ENC, VCR), One G and B Outputs (TV) Y/Pb/Pr Option (to 6MHz) VCR Input Monitor Loop-Through Mode for Standby Auto-Startup Mode for Power Saving SCART Pin#16(Fast Blanking), Pin#8(Slow Blanking) Control AK4702/04 Software Compatible
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[AK4705]
Power Supply 5V+/-5% and 12V+/-5% Low Power Dissipation / Low Power Standby Mode Package Small 48-pin LQFP
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[AK4705]
VD VP VSS -6dB/0dB/ +2.44/+4dB MCLK BICK LRCK SDTI Volume #0 TV1/0 VCRINL VCRINR Volume #1 MONO TVOUTL +6 to -60dB (2dB/step) VOL MONOOUT
DAC
TVOUTR
TVINL
VCROUTL
VCROUTR TVINR Bias (Mute) SCK SDA PDN Register Control VCR1/0 DVCOM PVCOM VMONO
Audio Block(DAPD="0")
VD VP VSS +6 to -60dB 0dB/+6dB (NC) DACL DACR (NC) Volume #2 TV1/0 VCRINL VCRINR Volume #1 MONO TVOUTR TVOUTL (2dB/step) VOL MONOOUT
TVINL
VCROUTL
VCROUTR TVINR Bias (Mute) SCK SDA PDN Register Control VCR1/0 DVCOM PVCOM VMONO
Audio Block(DAPD="1")
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[AK4705]
( Typical connection )
VVD1 VVD2 VVSS 6dB RFV
( Typical connection ) RF Mod
ENC CVBS/Y ENC Y VCR CVBS/Y TV CVBS
ENCV ENCY VCRVIN TVVIN 0, 1, 2, 3dB 6dB TVVOUT
ENC R/C/Pr ENC C VCR R/C/Pr
ENCRC ENCC VCRRC 6dB TVRC TV SCART
ENC G/CVBS VCR G
ENCG VCRG 6dB TVG
ENC B/Pb VCR B/Pb
ENCB VCRB Monitor
6dB
TVB
REFI 6dB VCRVOUT VCR SCART
6dB VCRC
Video Block
( Typical connection ) VCR FB VCRFB 2V 0V 6dB TVFB
( Typical connection )
TV SCART
0/ 6/ 12V
TVSB
VCRSB 0/ 6/ 12V
VCR SCART
Monitor
INT
Video Blanking Block
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[AK4705]
Ordering Guide
AK4705 -10 +70C 48pin LQFP (0.5mm pitch)
Pin Layout
MONOOUT VCROUTR VCROUTL TVOUTR TVOUTL DVCOM VCRINL 26 PVCOM TVINR TVINL VCRINR 25 24 23 22
VP 34
36
35
33
32
31
30
29
28
27
VSS VD MCLK BICK SDTI LRCK SCL SDA PDN RFV VCRVOUT TVFB
37 38 39 40 41 42 43 44 45 46 47 48 10 12 11 1 2 3 4 5 6 7 8 9 Top View
TVSB VCRSB INT VCRB VCRG VCRRC VCRFB VCRVIN TVVIN ENCY ENCV ENCC
AK4705VQ
21 20 19 18 17 16 15 14 13
TVVOUT
MS0451-E-01 -5-
ENCG
ENCB
TVRC
VVSS
VVD2
VVD1
REFI
ENCRC
VCRC
TVG
TVB
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[AK4705]
Main difference between AK4702/4704 and AK4705
Items Audio Audio bits Digital filter attenuation level +4dB gain at DAC volume#0 (total: +10dB max) DAC power-down/analog input mode Volume#1 output for VCROUTL/R switch matrix MONO mixing for VCROUTL/R MONO input Video filter 150ohm video driver for modulator Y/C mixer for modulator VCR video input monitor VCR Slow Blanking monitor in output mode. TV/VCR CVBS input detection & Power Save Mode Y/Pb/Pr option RGB support in Auto Mode MONOIN Pin (at AK4702 Pin #28) ENCB Pin to TVINL Pin I2C speed (max) Mask bits for INT function (09H) FB/SB loop back in auto mode. AK4702 18bit 54dB X enabled MONOIN Pin# 28 Pin #9 ~ #27 100kHz AK4704 AK4705 24bit 24bit 64dB 64dB X X X X X X X X X X X X X X X disabled disabled X X X X FILT REFI Pin #28 Pin #9 Pin #9 ~ #27 Pin #10 ~ #28 400kHz 400kHz X X X (-: NOT available. X: Available)
Video
Pinout
Others
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[AK4705]
PIN/FUNCTION
No. 1 2 3 4 Pin Name VCRC VVSS TVVOUT VVD2 I/O O O Function Chrominance Output Pin for VCR Video Ground Pin. 0V. Composite/Luminance Output Pin for TV Video Power Supply Pin #2, 5V Normally connected to VVSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. Red/Chrominance/Pr Output Pin for TV Green/Y Output Pin for TV Blue/Pb Output Pin for TV Video Power Supply Pin #1, 5V Normally connected to VVSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. Video Current Reference Setup Pin Normally connected to VVD1 through a 10k1% resistor externally. Blue/Pb Input Pin for Encoder Green/Y Input Pin for Encoder Red/Chrominance/Pr Input Pin for Encoder Chrominance Input Pin for Encoder Composite/Luminance Input1 Pin for Encoder Composite/Luminance Input2 Pin for Encoder Composite/Luminance Input Pin for TV Composite/Luminance Input Pin for VCR Fast Blanking Input Pin for VCR Red/Chrominance/Pr Input Pin for VCR Green Input Pin for VCR Blue/Pb Input Pin for VCR Interrupt Pin for Video Blanking. Normally connected to VD(5V) through 10k resistor externally. Slow Blanking Input/Output Pin for VCR Slow Blanking Output Pin for TV Rch VCR Audio Input Pin Lch VCR Audio Input Pin Rch TV Audio Input Pin Lch TV Audio Input Pin Rch VCR Audio Output Pin Lch VCR Audio Output Pin Rch TV Audio Output Pin Lch TV Audio Output Pin MONO Analog Output Pin Power Supply Pin, 12V Normally connected to VSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. DAC Common Voltage Pin Normally connected to VSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. Audio Common Voltage Pin Normally connected to VSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. The caps affect the settling time of audio bias level.
5 6 7 8
TVRC TVG TVB VVD1
O O O -
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
REFI ENCB ENCG ENCRC ENCC ENCV ENCY TVVIN VCRVIN VCRFB VCRRC VCRG VCRB INT VCRSB TVSB VCRINR VCRINL TVINR TVINL VCROUTR VCROUTL TVOUTR TVOUTL MONOOUT VP
O I I I I I I I I I I I I O I/O O I I I I O O O O O -
35
DVCOM
O
36
PVCOM
O
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[AK4705]
PIN/FUNCTION (Continued)
37 38 VSS VD Ground Pin. 0V. DAC Power Supply Pin, 5V Normally connected to VSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. Master Clock Input Pin at DAPD= "0". No Connect pin at DAPD= "1". This pin should be open. Audio Serial Data Clock Pin at DAPD= "0". Rch Analog Audio Input Pin at DAPD= "1". Audio Serial Data Input Pin at DAPD= "0". No Connect pin at DAPD= "1". This pin should be open. L/R Clock Pin at DAPD= "0". Lch Analog Audio Input Pin at DAPD= "1". Control Data Clock Pin Control Data Pin Power-Down Mode Pin When at "L", the AK4705 is in the power-down mode and is held in reset. The AK4705 should always be reset upon power-up. Composite Output Pin for RF modulator Composite/Luminance Output Pin for VCR Fast Blanking Output Pin for TV
39 40 41 42 43 44 45 46 47 48
MCLK (NC) BICK DACR SDTI (NC) LRCK DACL SCL SDA PDN RFV VCRVOUT TVFB
I I I I I I I I/O I O O O
Handling of Unused Pin
The unused I/O pins should be processed appropriately as below. Classification Pin Name VCRC, TVVOUT, TVRC, TVG, TVB, ENCB, ENCG, ENCRC, ENCC, ENCV, ENCY, TVVIN, VCRVIN, VCRRC, VCRG, VCRB, VCRINR, VCRINL, TVINR, TVINL, VCROUTR, VCROUTL, TVOUTR, TVOUTL, MONOOUT, DACR, DACL, RFV, VCRVOUT VCRSB (O), TVFB, TVSB VCRFB, VCRSB (I), MCLK, BICK, SDTI, LRCK, SCL, SDA, INT Setting These pins should be open.
Analog
Digital
These pins should be open. These pins should be connected to VSS.
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Internal Equivalent Circuits
Pin No. 39 40 41 42 43 45 Pin Name MCLK BICK SDTI LRCK SCL PDN Type Equivalent Circuit VD (60k)
200
Description
Digital IN (DAPD= "0") Analog IN (DAPD= "1")
The 60k is attached only for BICK pin and LRCK pin.
VSS
VD 200
44
SDA
Digital I/O
I2C Bus voltage must not exceed VD.
VSS
VP
22
INT
Digital OUT
Normally connected to VD(5V) through 10k resistor externally.
VSS
46 47 48 1 3 5 6 7
RFV VCROUT TVFB VCRC TVVOUT TVRC TVG TVB
VVD1
VVD2
Video OUT
VVSS
VVSS
VVD1 200
9 REFI REFI IN Normally connected to VVD1 through a 10k 1% resistor.
VVSS
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[AK4705]
Pin No. 10 11 12 13 14 15 16 17 18 19 20 21
Pin Name ENCB ENCG ENCRC ENCC ENCV ENCY TVVIN VCRVIN VCRFB VCRRC VCRG VCRB
Type
Equivalent Circuit
VVD1 200
Description
Video IN
(60k) VVSS
The 60k is attached for ENCC pin, ENCRC (chroma mode) pin and VCRRC (chroma mode) pin.
VP 200
VP
23 24
VCRSB TVSB
Video SB
(120k) VSS VSS VSS
The 120k is not attached for TVSB pin.
VP
25 26 27 28 VCRINR VCRINL TVINR TVINL
150k
Audio IN
VSS
VP VP 100
29 30 31 32 33
VCROUTR VCROUTL TVOUTR TVOUTL MONOOU T
Audio OUT
VSS VD VD
VSS VD 100
35 36
DVCOM PVCOM
VCOM OUT
VSS VSS
VSS
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[AK4705]
ABSOLUTE MAXIMUM RATINGS
(VSS=VVSS=0V;Note: 1) Parameter Power Supply Symbol VD VVD1 VVD2 VP IIN VIND VINV VINA VINA Ta Tstg min -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -10 -65 max 6.0 6.0 6.0 14 10 VD+0.3 VVD1+0.3 VP+0.3 VD+0.3 70 150 Units V V V V mA V V V V C C
Input Current (any pins except for supplies) Input Voltage Video Input Voltage Audio Input Voltage (except DACL/R pins) Audio Input Voltage (DACL/R pins) Ambient Operating Temperature Storage Temperature Note: 1. All voltages with respect to ground.
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
(VSS=VVSS=0V; Note: 1) Parameter Power Supply (Note: 2) Symbol VD VVD1/VVD2 VP Note: 2. Analog output voltage scales with the voltage of VD. AOUT (typ@0dB) = 2Vrms x VD/5. The VVD1 and VVD2 must be the same voltage. min 4.75 4.75 11.4 typ 5.0 5.0 12 max 5.25 5.25 12.6 Units V V V
*AKEMD assumes no responsibility for the usage beyond the conditions in this datasheet.
ELECTRICAL CHARACTERISTICS (Ta = 25C; VP=12V, VD = 5V; VVD1=VVD2 = 5V; fs = 48kHz; BICK = 64fs) Power Supplies Parameter min typ Power Supply Current Normal Operation (PDN pin = "H"; Note: 3) VD 14 VVD1+VVD2 46 VD+ VVD1+VVD2 VP 6 Power-Down Mode (PDN pin = "L"; Note: 4) VD 10 VVD1+VVD2 10 VP 10
Note: 3. STBY bit = "L", all video outputs are active. No signal, no load for A/V switches. fs=48kHz "0"data input for DAC. Note: 4. All digital inputs including clock pins (MCLK, BICK and LRCK) are held at VD or VSS.
max
Units
120 12 100 100 100
mA mA mA mA A A A
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[AK4705]
DIGITAL CHARACTERISTICS
(Ta = 25C; VD = 4.75 5.25V) Parameter High-Level Input Voltage Low-Level Input Voltage Low-Level Output Voltage (SDA pin: Iout= 3mA, INT pin: Iout= 1mA) Input Leakage Current Symbol VIH VIL VOL Iin min 2.0 typ max 0.8 0.4 100 Units V V V A
ANALOG CHARACTERISTICS (AUDIO) (Ta = 25C; VP=12V, VD = 5V; VVD1=VVD2 = 5V; fs = 48kHz; BICK = 64fs; Signal Frequency = 1kHz; 24bit Input Data; Measurement frequency = 20Hz 20kHz; RL 4.5k; Volume #0=Volume #1=0dB, 0dB=2Vrms output; unless otherwise specified) Parameter min typ max Units 24 bit DAC Resolution Analog Input: (TVINL/TVINR/VCRINL/VCRINR pins) Analog Input Characteristics Input Voltage 2 Vrms Input Resistance 100 150 k Analog Input: (DACL/DACR pin) Analog Input Characteristics Input Voltage 1 Vrms Input Resistance 40 60 k Stereo/Mono Output: (TVOUTL/TVOUTR/VCROUTL/VCROUTR/MONOOUT pins; Note: 5) Analog Output Characteristics Volume#0 Gain (DAPD bit = "0") (DVOL1-0 = "00") 0 dB (DVOL1-0 = "01") -6 dB (DVOL1-0 = "10") +2.44 dB (DVOL1-0 = "11". Note: 6) +4 dB Volume#2 Gain (DAPD bit = "1") (DVOL1-0 = "00") 5.3 6 6.7 dB (DVOL1-0 = "01") -0.7 0 0.7 dB Volume#1 Step Width (+6dB to -12dB) 1.6 2 2.4 dB (-12dB to -40dB) 0.5 2 3.5 dB (-40dB to -60dB) 0.1 2 3.9 dB -86 -80 dB THD+N (at 2Vrms output. Note: 7) -60 dB (at 3Vrms output. Note: 7, Note: 8) Dynamic Range (-60dB Output, A-weighted. Note: 7) 92 96 dB S/N (A-weighted. Note: 7) 92 96 dB Interchannel Isolation (Note: 7, Note: 9) 80 90 dB Interchannel Gain Mismatch (Note: 7, Note: 9) 0.3 dB Gain Drift 200 ppm/C Load Resistance (AC-Lord) TVOUTL/R, VCROUTL/R, MONOOUT 4.5 k Load Capacitance TVOUTL/R, VCROUTL/R, MONOOUT 20 pF Output Voltage (Note: 10) 1.85 2 2.15 Vrms Power Supply Rejection (PSR. Note: 11) 50 dB Note: 5. Measured by Audio Precision System Two Cascade. Note: 6. Output clips over -2.5dBFS digital input. Note: 7. DAC to TVOUT Note: 8. Except VCROUTL/VCROUTL pins. Note: 9. Between TVOUTL and TVOUTR with digital inputs 1kHz/0dBFS.
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[AK4705]
Note: 10. Full-scale output voltage by DAC (0dBFS). Output voltage of DAC scales with the voltage of VD, Stereo output (typ@0dBFS) = 2Vrms x VD/5 when volume#0=volume#1=0dB. The output must not exceed 3Vrms. Note: 11. The PSR is applied to VD with 1kHz, 100mV.
FILTER CHARACTERISTICS (Ta = 25C; VP=11.412.6V, VD = 4.755.25V, VVD1=VVD2 = 4.755.25V; fs = 48kHz; DEM0 = "1", DEM1 = "0") Parameter Symbol min typ max Units Digital filter PB 0 21.77 kHz Passband 0.05dB (Note: 12) 24.0 kHz -6.0dB Stopband (Note: 12) SB 26.23 kHz Passband Ripple PR dB 0.01 Stopband Attenuation SA 64 dB Group Delay (Note: 13) GD 24 1/fs Digital Filter + LPF FR dB Frequency Response 0 20.0kHz 0.5
Note: 12. The passband and stopband frequencies scale with fs. e.g.) PB=0.4535xfs (@0.05dB), SB=0.546xfs. Note: 13. The calculating delay time which occurred by digital filtering. This time is from setting the 16/18/24bit data of both channels to input register to the output of analog signal.
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ANALOG CHARACTERISTICS (VIDEO) (Ta = 25C; VP=12V, VD = 5V; VVD1=VVD2 = 5V; VVOL1/0= "00" unless specified.) Parameter Conditions min Sync Tip Clamp Voltage at output pin. Chrominance Bias Voltage at output pin. Pb/Pr Clamp Voltage at output pin. Gain Input=0.3Vp-p, 100kHz 5.5 RGB Gain Input=0.3Vp-p, VVOL1/0= "00" 5.5 100kHz VVOL1/0= "01" 6.7 VVOL1/0= "10" 7.7 VVOL1/0= "11" 8.6 Interchannel Gain Mismatch TVRC, TVG, TVB. Input=0.3Vp-p, 100kHz. -0.5 Frequency Response Input=0.3Vp-p, C1=C2=0pF. 100kHz to 6MHz. -1.0 at 10MHz. at 27MHz. Group Delay Distortion At 4.43MHz with respect to 1MHz. Input Impedance Chrominance input (internally biased) 40 Input Signal f=100kHz, maximum with distortion < 1.0%, gain=6dB. Load Resistance (Figure 1) 150 Load Capacitance C1 (Figure 1) C2 (Figure 1) Dynamic Output Signal f=100kHz, maximum with distortion < 1.0% Y/C Crosstalk f=4.43MHz, 1Vp-p input. Among TVVOUT, TVRC, VCRVOUT and VCRC outputs. S/N Reference Level = 0.7Vp-p, CCIR 567 weighting. BW= 15kHz to 5MHz. Differential Gain 0.7Vpp 5steps modulated staircase. chrominance &burst are 280mVpp, 4.43MHz. Differential Phase 0.7Vpp 5steps modulated staircase. chrominance &burst are 280mVpp, 4.43MHz.
R1 75 Video Signal Output C2 max: 15pF C1 max: 400pF R2 75
typ 0.7 2.2 2.2 6 6 7.2 8.2 9.1 -3 -40 60 -
max
6.5 6.5 7.7 8.7 9.6 0.5 0.5 -25 15 1.5 400 15 3 -
Units V V V dB dB dB dB dB dB dB dB dB ns k Vpp pF pF Vpp dB dB % Degree
-50 74 +0.4 +0.8
Figure 1. Load Resistance R1+R2 and Load Capacitance C1/C2.
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[AK4705]
SWITCHING CHARACTERISTICS (Ta = 25C; VP=11.4 12.6V, VD = 4.75 5.25V, VVD1=VVD2 = 4.75 5.25V) Parameter Symbol Min typ fCLK 8.192 Master Clock Frequency 256fs: dCLK 40 Duty Cycle fCLK 12.288 384fs: dCLK 40 Duty Cycle fs 32 LRCK Frequency Duty 45 Duty Cycle Audio Interface Timing tBCK 312.5 BICK Period tBCKL 100 BICK Pulse Width Low tBCKH 100 Pulse Width High tBLR 50 BICK "" to LRCK Edge (Note: 14) tLRB 50 LRCK Edge to BICK "" (Note: 14) tSDH 50 SDTI Hold Time tSDS 50 SDTI Setup Time Control Interface Timing (I2C Bus): SCL Clock Frequency fSCL Bus Free Time Between Transmissions tBUF 1.3 Start Condition Hold Time tHD:STA 0.6 (prior to first clock pulse) Clock Low Time tLOW 1.3 Clock High Time tHIGH 0.6 Setup Time for Repeated Start Condition tSU:STA 0.6 SDA Hold Time from SCL Falling (Note: 15) tHD:DAT 0 SDA Setup Time from SCL Rising tSU:DAT 0.1 Rise Time of Both SDA and SCL Lines tR Fall Time of Both SDA and SCL Lines tF Setup Time for Stop Condition tSU:STO 0.6 Pulse Width of Spike Noise tSP 0 Suppressed by Input Filter Capacitive load on bus Cb Reset Timing tPD 150 PDN Pulse Width (Note: 16) Note: 14. BICK rising edge must not occur at the same time as LRCK edge. Note: 15. Data must be held for sufficient time to bridge the 300 ns transition time of SCL. Note: 16. The AK4705 should be reset by PDN pin = "L" upon power up. Note: 17. I2C is a registered trademark of Philips Semiconductors.
max 12.8 60 19.2 60 50 55
Units MHz % MHz % kHz % ns ns ns ns ns ns ns
400 0.3 0.3 50 400
kHz s s s s s s s s s s s F ns
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[AK4705]
Timing Diagram
1/fCLK MCLK tCLKH tCLKL VIH VIL
dCLK=tCLKH x fCLK, tCLKL x fCLK
1/fs VIH VIL tBCK VIH VIL tBCKH tBCKL
LRCK
BICK
Clock Timing
LRCK tBLR tLRB
VIH VIL
BICK tSDS tSDH
VIH VIL
SDTI
VIH VIL
Serial Interface Timing
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[AK4705]
tPD
PDN
VIL
Power-down Timing
VIH SDA VIL tBUF SCL VIL tHD:STA Stop Start tHD:DAT tSU:DAT tSU:STA Start
I2C Bus mode Timing
tLOW
tR
tHIGH
tF
tSP VIH
tSU:STO Stop
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[AK4705]
OPERATION OVERVIEW
1. System Reset and Power-down options
The AK4705 should be reset once by bringing PDN pin = "L" upon power-up. The AK4705 has several operation modes. The PDN pin, AUTO bit, DAPD bit, MUTE bit and STBY bit control operation modes as shown in Table 1 and Table 2. Mode 0 1 2 3 4 5 6 7 PDN pin L H H H H H H H AUTO bit x 1 0 0 0 0 0 0 STBY bit x x 1 1 0 0 0 0 MUTE bit x x 1 0 1 1 0 0 DAPD bit x x x x 1 0 1 0 Mode Full Power-down Auto Startup mode (power-on default) Standby & mute Standby Mute (DAC power down) Mute (DAC operation) Normal operation (DAC power down & Analog input) Normal operation (DAC operation) x: Don't Care
Table 1. Operation Mode Settings Register Control NOT available No video input Video input (3) Available Active Power down Active Power down Needed Not needed Needed Active (1) Active (4) Hi-Z/ Active Active Active MCLK, BICK, LRCK Not needed Audio Bias Level Power down Video Output Hi-Z TVFB, TVSB Hi-Z
Mode 0 1 Full Power-down Auto Startup mode (power-on default)
VCRSB Pull-down (2)
2 3 4 5 6 7
Standby & mute Standby Mute (DAC power down) Mute (DAC operation) Normal operation (DAC power down & Analog input) Normal operation (DAC operation)
Notes: (1) TVOUTL/R are muted by VMUTE bit in the default state. (2) Internally pulled down by 120kohm(typ) resistor. (3) Video input to TVVIN or VCRVIN. (4) VCRC outputs 0V for termination. Table 2. Status of each operation modes
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[AK4705]
Full Power-down Mode
The AK4705 should be reset once by bringing PDN pin = "L" upon power-up. PDN pin: Power down pin "H": Normal operation "L": Device power down.
Auto Startup Mode
After when the PDN pin is set to "H", the AK4705 is in the auto startup mode. In this mode, all blocks except for the video detection circuit are powered down. Once the video detection circuit detects video signal from TVVIN pin or VCRVIN pin, the AK4705 goes to the stand-by mode (Both Fast Blanking and Slow Blanking are also fixed to VCR-TV Loop-through) automatically and sends "H" pulse via INT pin. To exit the auto startup mode, set the AUTO bit to "0". AUTO bit (00H D3): Auto startup bit "1": Auto startup enable (default). "0": Auto startup disable (Manual startup).
DAC Power-down Mode
The internal DAC block can be powered-down and switched to 1Vrms analog input mode. When DAPD bit ="1", the zero-cross detection and offset calibration does not work. DAPD bit (00H D2): DAC power-down bit. "1": DAC power-down. Analog-input mode. #39 pin: MCLK -> (NC) #40 pin: BICK -> DACR. Rch analog input. #41 pin: SDTI -> (NC) #42 pin: LRCK -> DACL. Lch analog input. "0": DAC operation. (default)
Standby Mode
When the AUTO bit = MUTE bit = "0" and the STBY bit = "1", the AK4705 is forced into TV-VCR loop through mode. In this mode, the sources of TVOUTL/R and MONOOUT pins are fixed to VCRINL/R pins; the sources of VCROUTL/R are fixed to TVINL/R pins respectively. The gain of volume#1 is fixed to 0dB. All register values themselves are NOT changed by STBY bit = "1". STBY bit (00H D0): Standby bit. "1": Standby mode. (default) "0": Normal operation.
Mute Mode (Bias-off Mode. 00H: D1)
When the MUTE bit = "1", the bias voltage on the audio output goes to GND level. Bringing MUTE bit to "0" changes this bias voltage smoothly from GND to VP/2 by 2sec(typ.). This removes the huge click noise related the sudden change of bias voltage at power-on. The change of MUTE bit from "1" to "0" also makes smooth transient from VP/2 to GND by 2sec(typ). This removes the huge click noise related the sudden change of bias voltage at power-off. MUTE bit: Bias-off bit. "1": Set the audio bias to GND. (default) "0": Normal operation
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[AK4705]
Normal Operation Mode
To use the DAC or change analog switches, set the AUTO bit, DAPD bit, MUTE bit and STBY bit to "0". The DAC is in power-down mode until MCLK and LRCK are input. The AK4705 is in power-down mode until MCLK and LRCK are input. Figure 2 shows an example of the system timing at the power-down and power-up by PDN pin.
Typical Operation Sequence (auto setup mode)
Figure 2 shows an example of the system timing for the auto setup mode.
PDN pin Clock, Data in TVVIN VCRVIN TVVOUT, VCRVOUT Audio out (DC)
don't care No Signal Signal in
Low Power Mode
Low Power Mode
Low Power Mode
don't care
No Signal
Signal in
No Signal
don't care
don't care
No Signal
Signal in
No Signal
don't care
Hi-Z
Active (loop-through)
Hi-Z
Active (loop-through)
Hi-Z
(GND)
Active (loop-through)
Active (loop-through)
Figure 2. Typical operating sequence (auto setup mode)
Typical Operation Sequence (except auto setup mode)
Figure 3 shows an example of the system timing except for the auto setup mode.
PDN pin AUTO bit MUTE bit STBY bit Clock in Data in
D/A Out (internal)
"Stand-by" "Mute" "Stand-by"
"1" (default) "1" (default) "1" (default) "0"
"0" "1" "0" "0" "1" "1"
don't care (2) don't care "0" GD
normal operation Audio data "0" GD (1)
don't care (2) don't care
(1)
TV-Source select
fixed to VCR in(Loop-through)
VCR in (default)
DAC
VCR in
(4)
offset calibration
TV out
VCR in
VCR in
(3)
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[AK4705]
Figure 3. Typical operating sequence (except auto setup mode) Notes: (1) The analog output corresponding to the digital input has a group delay, GD. (2) The external clocks (MCLK, BICK and LRCK) can be stopped in standby mode. (3) Mute the analog outputs externally if click noise(3) adversely affects the system. (4) In case of the CAL bit = "1", the offset calibration is always executed when the source of TVOUTL/R pins are switched to DAC after the STBY bit is changed to "0". To disable this function, set the CAL bit = "0".
2. Audio Block
System Clock
The external clocks required to operate the DAC section of AK4705 are MCLK, LRCK and BICK. The master clock (MCLK) corresponds to 256fs or 384fs. MCLK frequency is automatically detected, and the internal master clock becomes 256fs. The MCLK should be synchronized with LRCK but the phase is not critical. Table 3 illustrates corresponding clock frequencies. All external clocks (MCLK, BICK and LRCK) should always be present whenever the DAC section of AK4705 is in the normal operating mode (STBY bit = "0" and DAPD bit = "0"). If these clocks are not provided, the AK4705 may draw excess current because the device utilizes dynamically refreshed logic internally. The DAC section of AK4705 should be reset by STBY bit = "0" after threse clocks are provided. If the external clocks are not present, place the AK4705 in power-down mode (STBY bit = "1"). After exiting reset at power-up etc., the AK4705 remains in power-down mode until MCLK and LRCK are input. LRCK fs 32.0kHz 44.1kHz 48.0kHz MCLK 256fs 384fs 8.1920MHz 12.2880MHz 11.2896MHz 16.9344MHz 12.2880MHz 18.4320MHz Table 3. System clock example BICK 64fs 2.0480MHz 2.8224MHz 3.0720MHz
Audio Serial Interface Format (00H: D5-D4)
Data is shifted in via the SDTI pin using BICK and LRCK inputs. The DIF0 and DIF1 bits can select four formats in serial mode as shown in Table 4. In all modes, the serial data is MSB-first, 2's compliment format and is latched on the rising edge of BICK. Mode 2 can also be used for 16 MSB justified formats by zeroing the unused two LSBs. Mode 0 1 2 3 DIF1 0 0 1 1 DIF0 0 1 0 1 SDTI Format 16bit LSB Justified 18bit LSB Justified 24bit MSB Justified BICK 32fs 36fs 48fs 48fs or 24bit I2S Compatible 32fs Table 4. Audio Data Formats Figure Figure 4 Figure 4 Figure 5 Figure 6 (default)
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[AK4705]
LRCK BICK SDTI Mode 0 SDTI Mode 1
Don't care 15:MSB, 0:LSB Don't care 17:MSB, 0:LSB 17 16
15 14
0
Don't care
15 14
0
15
14
0
Don't care
17
16
15
14
0
Lch Data
Figure 4. Mode 0,1 Timing
Rch Data
LRCK BICK SDTI
23 22 23:MSB, 0:LSB 1 0 Don't care 0 Don't care
23 22
1
17
16
Lch Data
Figure 5. Mode 2 Timing
Rch Data
LRCK BICK SDTI
1 0 Don't care 0 17
23 22 23:MSB, 0:LSB
23 22
1
Don't care
Lch Data
Figure 6. Mode 3 Timing
Rch Data
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[AK4705]
De-emphasis filter (00H: D7-D6)
A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc = 50/15s) and is controlled by the DEM0 and DEM1 bits. DEM1 DEM0 Mode (default)
0 0 44.1kHz 0 1 OFF 1 0 48kHz 1 1 32kHz Table 5. De-emphasis filter control
Switch Control
The AK4705 has switch matrixes designed primarily for SCART routing. Those are controlled via the control register as shown in Table 6, Table 7 and Table 8 (refer to the block diagram). (01H: D1-D0) TV1 TV0 Source of TVOUTL/R 0 0 DAC (default) 0 1 VCRIN 1 0 Mute 1 1 (Reserved) Table 6. TVOUT Switch Configuration (01H: D2-D0) VOL TV1 TV0 Source of MONOOUT 0 0 0 DAC (L+R)/2 Bypass the 0 0 1 DAC (L+R)/2 volume #1 0 1 0 DAC (L+R)/2 0 1 1 (Reserved) 1 0 0 DAC (L+R)/2 Through the volume #1 1 0 1 VCRIN (L+R)/2 (default) 1 1 0 Mute 1 1 1 (Reserved) Table 7. MONOOUT Switch Configuration (01H: D5-D4) VCR1 VCR0 Source of VCROUTL/R 0 0 DAC 0 1 TVIN 1 0 Mute 1 1 Output of volume #1 Table 8. VCROUT Switch Configuration
(default)
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[AK4705]
Volume Control #0, #2 (4-Level Volume)
The AK4705 has a 4-level volume control (Volume #0, #2) as shown in Table 9 and Table 10. The volume reflects the change of register value immediately. (03H: D4-D3) DVOL1 DVOL0 0 0 0 1 1 0 1 1
Volume #0 Gain 0dB -6dB +2.44dB
Output Level (Typ) 2Vrms (with 0dBFS input & volume #1=0dB) 1Vrms (with 0dBFS input & volume #1=0dB.) 2.65Vrms (with 0dBFS input & volume #1=0dB.) 2Vrms (with -10dBFS input & volume #1=+6dB. +4dB Clips over -2.5dBFS digital input.) Table 9. Volume #0 (at DAPD bit = "0". DAC mode)
(default)
(03H: D4-D3) DVOL1 DVOL0 0 0 0 1 1 0 1 1
Volume #2 Gain Output Level (Typ) +6dB 2Vrms (with 1Vrms input & volume #1=0dB) 0dB 1Vrms (with 1Vrms input & volume #1=0dB.) (reserved) (reserved) Table 10. Volume #2 (at DAPD bit = "1". analog input mode.)
(default)
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[AK4705]
Volume Control #1 (Main Volume)
The AK4705 has main volume control (Volume #1) as shown in Table 11. (02H: D5-D0) L5 L4 L3 L2 L1 L0 1 0 0 0 1 0 1 0 0 0 0 1 1 0 0 0 0 0 0 1 1 1 1 1 ... ... ... ... ... ... 0 0 0 0 0 1 0 0 0 0 0 0 Note: The output must not exceed 3Vrms. Table 11. Volume #1
Gain +6dB +4dB +2dB 0dB ... -60dB Mute
(default)
When the MOD bit = "1"(default), changing levels don't have pop noise. MDT1-0 bits select the transition time (Table 12). When the new gain value 1EH(-2dB) is written to gain resistor while the actual (stable) gain is 1FH(0dB), the gain changes to 1EH(-2dB) within the transition time selected by MDT1-0 bits. The AK4705 compares the actual gain to the value of gain register after finishing the transition time, and re-changes the actual gain to new resister value within the transition time if the register value is different from the actual gain. When the MOD bit = "0", there is no transition time and the gain changes immediately. This change may cause a click noise.
WR [Gain=1EH] WR [Gain=1DH] WR [Gain=1CH]
Gain Register
1FH
1EH compare
1DH
1CH compare compare 1CH
Actual Gain
1FH (to 1EH)
1EH
(to 1DH)
(to 1CH)
1DH Transition Time (256/fs to 2048/fs. pop free.)
Figure 7. Volume Change Operation (MOD bit = "1") MDT1 0 0 1 1 MDT0 Transition Time 0 256/fs 1 512/fs 0 1024/fs 1 2048/fs Table 12. Volume Transition Time
(default)
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[AK4705]
3. Video Block
Video Switch Control
The AK4705 has switches for TV, VCR and RF modulator. Each switches can be controlled via registers independently. When AUTO bit = "1" or STBY bit = "1", these switch setting are ignored and set to fixed configuration (loop-through mode). Please refer to the auto setup mode and standby mode. (04H: D2-D0) Mode Shutdown Encoder CVBS+RGB or Encoder YPbPr Encoder Y/C 1 Encoder Y/C 2 VCR TV CVBS (reserved) (reserved) VTV2-0 bit 000 001 010 011 100 101 110 111 Source of TVVOUT pin (Hi-Z) ENCV pin. Encoder CVBS or Y. ENCV pin. Encoder Y. ENCY pin. Encoder Y. VCRVIN pin. VCR CVBS or Y. TVVIN pin. TV CVBS. Source of TVRC pin (Hi-Z) ENCRC pin. Encoder Red,C or Pb. ENCRC pin. Encoder C. ENCC pin. Encoder C. VCRRC pin. VCR Red,C or Pb. (Hi-Z) Source of TVG pin (Hi-Z) ENCG pin. Encoder Green or Y. (Hi-Z) (Hi-Z) VCRG pin. VCR Green or Y. (Hi-Z) Source of TVB pin (Hi-Z) ENCB pin. Encoder Blue or Pr. (Hi-Z) (Hi-Z) VCRB pin. VCR Blue or Pr. (Hi-Z) (Note: 18, Note: 19) (default)
Table 13. TV video output (04H: D5-D3) Mode Shutdown Encoder CVBS or Y/C 1 Encoder CVBS or Y/C 2 TV CVBS VCR (reserved) (reserved) (reserved) VVCR2-0 bit 000 001 010 011 100 101 110 111 Source of VCRVOUT pin (Hi-Z) ENCV pin. Encoder CVBS or Y. ENCY pin. Encoder CVBS or Y. TVVIN pin. TV CVBS. VCRVIN pin. VCR CVBS. Source of VCRC pin (Hi-Z) ENCRC pin. Encoder C. ENCC pin. Encoder C. (Hi-Z) VCRRC pin. VCR C. (Note: 18) (default)
Table 14. VCR video output
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[AK4705]
(04H: D7-D6) Source of RFV pin ENCV pin. Encoder CVBS1 00 Encoder CVBS. ENCG pin. Encoder CVBS2 01 Encoder CVBS. (Note: 19) VCRVIN pin. VCR 10 (default) VCR CVBS. Shutdown 11 (Hi-Z) (Note: 19) Table 15. RF video output Mode Note: 18: When input the video signal via ENCRC pin or VCRRC pin, set CLAMP1-0 bits respectively. Note: 19 When VTV2-0 bit ="001", TVG bit ="1" and VRF1-0 bit ="01", RFV pin output is same as TVG pin output (Encoder G). VRF1-0 bit
Video Output Control (05H: D6-D0)
Each video outputs can be set to Hi-Z individually via control registers. These setting are ignored when the AUTO bit = "1". When the CIO bit = "1", the VCRC pin outputs 0V even if the VCRC bit = "0". When the CIO bit = "0", the VCRC pin follows the setting of VCRC bit. Please refer to the "Red/Chroma Bi-directional Control for VCR SCART". TVV: TVR: TVG: TVB: VCRV: VCRC: TVFB: TVVOUT output control TVRCOUT output control TVGOUT output control TVBOUT output control VCRVOUT output control VCRC output control TVFB output control
0: Hi-Z (default) 1: Active.
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[AK4705]
Red/Chroma Bi-directional Control for VCR SCART (05H: D7, D5)
The AK4705 supports the bi-directional Red/Chroma signal on the VCR SCART.
(CIO bit & VCRC bit) 75 VCRC pin
#15 pin
VCRRC pin VCR SCART 0.1u
(AK4705)
Figure 8. Red/Chroma Bi-directional Control
CIO 0 0 1 1
VCRC State of VCRC pin (default) 0 Hi-z 1 Active 0 Connected to GND 1 Connected to GND Table 16 Red/Chroma Bi-directional Control
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[AK4705]
RGB Video Gain Control (06H: D1-D0)
VVOL1-0 bits set the RGB video gain. VVOL1 0 0 1 1 VVOL0 0 1 0 1 Gain Output level (Typ. @Input=0.7Vpp) +6dB 1.4Vpp +7.2dB 1.6Vpp +8.2dB 1.8Vpp +9.1dB 2.0Vpp Table 17. RGB video gain control
(default)
Clamp and DC-restore circuit control (06H: D7-D2)
Each CVBS and Y input has the sync tip clamp circuit. The DC-restore circuit has two clamp voltages 0.7V(typ) and 2.2V(typ) to support both RGB and YPbPr signal. They correspond to 0.35V(typ) and 1.1V(typ) at the SCART connector when matched by 75ohm resistors. The CLAMP1, CLAMP0 and CLAMPB bits select the input circuit for ENCRC pin (Encoder Red/Chroma), ENCB pin (Encoder Blue), VCRRC pin (VCR Red/Chroma) and VCRB pin (VCR Blue) respectively. VCLP1-0 bits select the sync source of DC- restore circuit. CLAMPB 0 0 1 1 CLAMP0 0 1 0 1 VCRRC Input Circuit VCRB Input Circuit DC restore clamp active DC restore clamp active (0.7V at sync timing/output pin) (0.7V at sync timing/output pin) Biased (DC restore clamp active) (2.2V at sync timing/output pin) (0.7V at sync timing output pin) DC restore clamp active DC restore clamp active (2.2V at sync timing/output pin) (2.2V at sync timing/output pin) (reserved) (reserved) Table 18. DC-restore control for VCR Input note for RGB for Y/C for Y/Pb/Pr (default)
CLAMPB 0 0 1 1
CLAMP1 0 1 0 1
ENCRC Input Circuit ENCB Input Circuit DC restore clamp active DC restore clamp active (0.7V at sync timing/output pin) (0.7V at sync timing/output pin) Biased DC restore clamp active (2.2V at sync timing/output pin) (0.7V at sync timing output pin) DC restore clamp active DC restore clamp active (2.2V at sync timing/output pin) (2.2V at sync timing/output pin) (reserved) (reserved) Table 19. DC-restore control for Encoder Input
note for RGB for Y/C for Y/Pb/Pr (default)
CLAMP2 0 1
ENCG Input Circuit DC restore clamp active (0.7V at sync timing/output pin) Sync tip clamp active (0.7V at sync timing/output pin)
note for RGB for Y/Pb/Pr (default)
Note: When the VTV2-0 bits = "001"(source for TV = Encoder CVBS /RGB), TVG bit = "1" (TVG = active) and VCLP1-0 bits = "11"(DC restore source = ENCG), the sync tip is selected even if the CLAMP2 bit = "0". Table 20. DC-restore control for Encoder Green/Y Input
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[AK4705]
VCLP1-0: DC restore source control VCLP1 0 0 1 1 VCLP0 0 1 0 1 Sync Source of DC Restore ENCV ENCY VCRVIN ENCG
(default)
Note: When the AUTO bit = "1", the source is fixed to VCRVIN. Table 21. DC-restore source control
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[AK4705]
4. Blanking Control
The AK4705 supports Fast Blanking signals and Slow Blanking (Function Switching) signals for TV/VCR SCART.
Input/Output Control for Fast/Slow Blanking
FB1-0: TV Fast Blanking output control (07H: D1-D0) FB1 0 0 1 1 FB0 0 1 0 1 TVFB pin Output Level (default) 0V 4V Same as VCR FB input (4V/0V) (Reserved) (Note: Minimum load is 150ohm) Table 22. TV Fast Blanking output
SBT1-0: TV Slow Blanking output control (07H: D3-D2) SBT1 0 0 1 1 SBT0 0 1 0 1 TVSB pin Output Level (default) <2V 5V to 7V (Reserved) 10V< (Note: Minimum load is 10kohm) Table 23. TV Slow Blanking output
SBV1-0: VCR Slow Blanking output control (07H: D5-D4) SBV1 0 0 1 1 SBV0 0 1 0 1 VCRSB pin Output Level (default) <2V 5V to 7V (Reserved) 10V< (Note: Minimum load is 10kohm) Table 24. VCR Slow Blanking output
SBIO1-0: TV/VCR Slow Blanking I/O control (07H: D7-D6) SBIO1 0 0 1 1 SBIO0 0 1 0 1 VCRSB pin Direction TVSB pin Direction Output Output (Controlled by SBV1,0) (Controlled by SBT1,0) (Reserved) (Reserved) Input Output (Stored in SVCR1,0) (Controlled by SBT1,0) Input Output (Stored in SVCR1,0) (Same output as VCR SB) Table 25. TV/VCR Slow Blanking I/O control
(default)
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5. Monitor Options and INT function
Monitor Options (08H: D4-D0)
The AK4705 has several detection functions. SVCR1-0 bits, FVCR bit, VCMON bit and TVMON bit reflect the input DC level of VCR slow blanking, the input DC level of VCR fast blanking and signals input to TVVIN or VCRVIN pins. SVCR1-0: VCR Slow blanking status monitor SVCR1-0 reflect the voltage at VCRSB pin only when the VCRSB pin is in the input mode. When the VCRSB is in the output mode, SVCR1-0 hold previous value. VCRSB pin input level SVCR1 SVCR0 < 2V 0 0 4.5 to 7V 0 1 (Reserved) 1 0 9.5< 1 1 Table 26. VCR Slow Blanking monitor FVCR: VCR Fast blanking input level monitor This bit is enabled when TVFB bit = "1". VCRFB pin input level FVCR <0.4V 0 1 V< 1 Table 27. VCR Fast Blanking monitor (Typical threshold is 0.7V) VCMON: VCRVIN pin video input monitor (MCOMN bit = "1"), TVVIN pin or VCRVIN pin video input monitor (MCOMN bit = "0". AK4704 compatible.) 0: No video signal detected. 1: Detects video signal. TVMON: TVVIN pin video input monitor (active when MCOMN bit = "1") 0: No video signal detected. 1: Detects video signal.
AUTO (00H D3) 0 0 0 0 0 0 0 0 1 1 1 1 MCOMN (09H D7) 0 0 0 0 1 1 1 1 x x x x TVVIN signal 0 0 1 1 0 0 1 1 0 0 1 1 VCRVIN signal 0 1 0 1 0 1 0 1 0 1 0 1 TVMON (08H D4) 0 0 0 0 0 0 1 1 0 0 0 0 VCMON (08H D3) 0 1 1 1 0 1 0 1 0 1 1 1
x: Don't care Note: 20. TVVIN/VCRVIN signal: 0 = No signal applied, 1 = signal applied Table 28. TV/VCR Monitor Function
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[AK4705]
INT Function and Mask Options (09H: D7, D4-D1)
Changes of the 08H status can be monitored via the INT pin. The INT pin is the open drain output and goes "L" for 2sec(typ.) when the status of 08H is changed. This pin should be connected to VD (typ. 5V) through 10kohm resistor. MTV bit, MVC bit, MCOMN bit, MFVCR bit and MSVCR bit control the reflection of the status change of these monitors onto the INT pin from report to prevent to masks each monitor.
AK4705
VD R=10k INT uP
Figure 9. INT pin MVC: VCMON Mask. Refer Table 30 MTV: TVMON Mask. Refer Table 29 MCOMN: Refer Table 28 AUTO (00H D3) 0 0 0 0 1 1 TVMON (08H D4) No Change No Change Change Change MTV (09H D4) 0 1 0 1 INT Hi-Z Hi-Z Generates "L" Pulse Hi-Z Hi-Z Hi-Z
No Change 0 No Change 1 Table 29. TV Monitor Mask VCMON (08H D3) No Change No Change Change Change MVC (09H D3) 0 1 0 1
AUTO (00H D3) 0 0 0 0 1 1 1 1
INT Hi-Z Hi-Z Generates "L" Pulse Hi-Z Hi-Z Hi-Z Generates "L" Pulse Generates "L" Pulse
No Change 0 No Change 1 Change 0 Change 1 Table 30. VCR Monitor Mask
MFVCR: FVCR Monitor mask. 0: Change of MFVCR is reflected to INT pin. (default) 1: Change of MFVCR is NOT reflected to INT pin. MSVCR: SVCR1-0 Monitor mask 0: Change of SVCR1-0 is reflected to INT pin. (default) 1: Change of SVCR1-0 is NOT reflected to INT pin.
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[AK4705]
6. Control Interface
I2C-bus Control Mode
1. WRITE Operations Figure 10 shows the data transfer sequence in 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 16). After the START condition, a slave address is sent. This address is 7 bits long followed by the eighth bit which is a data direction bit (R/W). The most significant seven bits of the slave address are fixed as "0010001". When the AK4705 receive the slave address, the AK4705 generates the 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 17). A "1" for R/W bit 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 address for control registers of the AK4705. The format is MSB first, and those most significant 3-bits are fixed to zeros (Figure 12). The data after the second byte contain control data. The format is MSB first, 8bits (Figure 13). The AK4705 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 16). The AK4705 can execute multiple one byte write operations in a sequence. After receipt of the third byte, the AK4705 generates an acknowledge, and awaits the next data again. The master can transmit more than one byte instead of terminating the write cycle after the first data byte is transferred. After the receipt of each data, the internal address counter is incremented by one, and the next data is taken into next address automatically. If the address exceeds 09H prior to generating the stop condition, the address counter will "roll over" to 00H and the previous data will be overwritten. The data on the SDA line must be 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 18) except for the START and the STOP condition.
S T A R T S T O P Data(n) A C K A C K Data(n+1) A C K A C K Data(n+x) A C K P
R/W= "0"
SDA
S
Slave Address A C K
Sub Address(n)
Figure 10. Data transfer sequence at the I2C-bus mode 0 0 1 0 0 0 1 R/W
Figure 11. The first byte 0 0 0 A4 A3 A2 A1 A0
Figure 12. The second byte D7 D6 D5 D4 D3 D2 D1 D0
Figure 13. Byte structure after the second byte
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[AK4705]
2. READ Operations Set R/W bit = "1" for READ operations. After transmission of data, the master can read the next address's data by generating an acknowledge instead of terminating the write cycle after receiving the first data word. After the receipt of each data, the internal address counter is incremented by one, and the next data is taken into next address automatically. If the address exceeds 09H prior to generating the stop condition, the address counter will "roll over" to 00H and the previous data will be overwritten. The AK4705 supports two basic read operations: CURRENT ADDRESS READ and RANDOM READ. 2-1. CURRENT ADDRESS READ The AK4705 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) was 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 set to "1", the AK4705 generates an acknowledge, transmits 1byte data which address is set by the internal address counter and increments the internal address counter by 1. If the master does not generate an acknowledge to the data but generate the stop condition, the AK4705 discontinues transmission
S T A R T R/W= "1" S T O P Data(n+1) A C K A C K Data(n+2) A C K A C K Data(n+x) A C K P
SDA
S
Slave Address A C K
Data(n)
Figure 14. CURRENT ADDRESS READ 2-2. RANDOM READ Random read operation allows the master to access any memory location at random. Prior to issuing the slave address with the R/W bit set to "1", the master must first perform a "dummy" write operation. The master issues a start condition, slave address(R/W="0") and then the register address to read. After the register's address is acknowledge, the master immediately reissues the start condition and the slave address with the R/W bit set to "1". Then the AK4705 generates an acknowledge, 1-byte data and increments the internal address counter by 1. If the master does not generate an acknowledge to the data but generate the stop condition, the AK4705 discontinues transmission.
S T A R T R/W= "0" S T A R T S A C K Slave Address A C K R/W= "1" S T O P Data(n+1) A C K A C K A C K Data(n+x) A C K P
SDA
S
Slave Address A C K
Sub Address(n)
Data(n)
Figure 15. RANDOM ADDRESS READ
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[AK4705]
SDA
SCL S start condition P stop condition
Figure 16. 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 17. Acknowledge on the I2C-bus
SDA
SCL
data line stable; data valid
change of data allowed
Figure 18. Bit transfer on the I2C-bus
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[AK4705]
Register Map
Addr 00H 01H 02H 03H 04H 05H 06H 07H 08H 09H Register Name Control Switch Main volume Zerocross Video switch Video output enable Video volume/clamp S/F Blanking control S/F Blanking monitor Monitor mask D7
DEM1 VMUTE 0 0 VRF1 CIO CLAMPB SBIO1 0 MCOMN
D6
DEM0 1 0 VMONO VRF0 TVFB VCLP1 SBIO0 0 0
D5
DIF1 VCR1 L5 1 VVCR2 VCRC VCLP0 SBV1 0 0
D4
DIF0 VCR0 L4 DVOL1 VVCR1 VCRV CLAMP2 SBV0 TVMON MTV
D3
AUTO MONO L3 DVOL0 VVCR0 TVB CLAMP1 SBT1 VCMON MVC
D2
DAPD VOL L2 MOD VTV2 TVG CLAMP0 SBT0 FVCR MFVCR
D1
MUTE TV1 L1 MDT1 VTV1 TVR VVOL1 FB1 SVCR1 MSVCR
D0
STBY TV0 L0 MDT0 VTV0 TVV VVOL0 FB0 SVCR0 0
When the PDN pin goes "L", the registers are initialized to their default values. While the PDN pin ="H", all registers can be accessed. Do not write any data to the register over 09H.
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[AK4705]
Register Definitions
Addr 00H Register Name Control R/W default 0 1 1 1 D7 DEM1 D6 DEM0 D5 DIF1 D4 DIF0 R/W 1 0 1 1 D3 AUTO D2 DAPD D1 MUTE D0 STBY
STBY: Standby control 0: Normal Operation 1: Standby Mode(default). DAC Gain of Volume#1 Source of TVOUT Source of VCROUT Source of MONOOUT Source of TVVOUT Source of TVRC Source of TVG Source of TVB Source of TVFB Source of TVSB Source of VCRVOUT Source of VCRC
: : : : : : : : : : :
powered down and timings are reset. fixed to 0dB, fixed to VCRIN, fixed to TVIN, fixed to VCRIN, fixed to VCRVIN(or Hi-Z), : fixed to VCRRC(or Hi-Z), fixed to VCRG(or Hi-Z), fixed to VCRB(or Hi-Z), fixed to VCRFB (or Hi-Z). fixed to VCRSB. fixed to TVVIN(or Hi-Z), : fixed to Hi-Z or VSS(controlled by CIO bit).
MUTE: Audio output control 0: Normal operation 1: ALL Audio outputs to GND (default) DAPD: DAC power down control 0: Normal operation (default). 1: DAC power down. When DAPD bit = "1", the soft transition for volume does not work. AUTO: Auto startup bit 0: Auto startup disable (Manual startup). 1: Auto startup enable (default). Note: When the SBIO1bit = "1"(default= "0"), the change of AUTO bit may cause a "L" pulse on INT pin. DIF1-0: Audio data interface format control 00: 16bit LSB Justified 01: 18bit LSB Justified 10: 24bit MSB Justified 11: 24bit I2S Compatible (default) DEM1-0: De-emphasis Response Control 00: 44.1kHz 01: off (default) 10: 48kHz 11: 32kHz
MS0451-E-01 - 38 -
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[AK4705]
Addr 01H
Register Name Switch R/W default
D7 VMUTE 1
D6
1
D5 VCR1 0
D4 VCR0 1 R/W
D3
MONO
D2
VOL
D1 TV1 0
D0 TV0 1
1
0
1
TV1-0: TVOUTL/R pins source switch 00: DAC 01: VCRINL/R pins (default) 10: MUTE 11: (Reserved) VOL: MONOOUT pin source switch 0: Bypass the volume (fixed to DAC out) 1: Through the volume (default) MONO: Mono select for TVOUTL/R pins 0: Stereo. (default) 1: Mono. (L+R)/2 VCR1-0: VCROUTL/R pins source switch 00: DAC 01: TVINL/R pins (default) 10: MUTE 11: Volume #1 output VMUTE: Mute switch for volume #1 0: Normal operation 1: Mute the volume #1 (default)
Addr 02H
Register Name Main volume R/W default
D7 0 0
D6 0 0
D5 L5 0
D4 L4 R/W 1
D3 L3 1
D2 L2 1
D1 L1 1
D0 L0 1
L5-0: Volume #1 control Those registers control both Lch and Rch of Volume #1. 111111 to 100011: (Reserved) 100010: Volume gain = +6dB 100001: Volume gain = +4dB 100000: Volume gain = +2dB 011111: Volume gain = +0dB (default) 011110: Volume gain = -2dB ... 000011: Volume gain = -56dB 000010: Volume gain = -58dB 000001: Volume gain = -60dB 000000: Volume gain = Mute
MS0451-E-01 - 39 -
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[AK4705]
Addr 03H
Register Name Zerocross R/W default
D7 0 0
D6
VMONO 0
D5 1 1
D4 DVOL1 R/W 0
D3 DVOL0 0
D2 MOD 1
D1 MDT1 1
D0 MDT0 1
MDT1-0: The time length control of volume transition time 00: typ. 256/fs 01: 512/fs 10: 1024/fs 11: 2048/fs (default) MOD: Soft transition enable for volume #1 control 0: Disable The volume value changes immediately without soft transition. 1: Enable (default) The volume value changes with soft transition. This function is disabled when STBY bit or DAPD bit = "1". DVOL1-0: Volume #0/Volume #2 control. Please refer Table 9 and Table 10 VMONO: Mono select for VCROUTL/R pins 0: Stereo. (default) 1: Mono. (L+R)/2
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[AK4705]
Addr 04H
Register Name Video switch R/W default
D7 VRF1 1
D6 VRF0 0
D5 VVCR2 0
D4 VVCR1 1 R/W
D3 VVCR0 1
D2 VTV2 1
D1 VTV1 0
D0 VTV0 0
VTV2-0: Selector for TV video output Refer Table 13. VVCR2-0: Selector for VCR video output Refer Table 14 VRF1-0: Selector for RFV pin output. Refer (50HNote: 19) Table 15. Addr 05H Register Name
Output enable
D7
CIO
D6
TVFB 0
D5
VCRC
D4
VCRV
D3
TVB
D2
TVG
D1
TVR
D0
TVV
R/W default TVV: TVR: TVG: TVB: VCRV: VCRC: TVFB: 0: 1:
R/W 0 0 0 0 0 0 0
TVVOUT output control TVRCOUT output control TVGOUT output control TVBOUT output control VCRVOUT output control VCRC output control (refer Table 16) TVFB output control Hi-Z (default) Active.
When the CIO pin = "1", the VCRC pin is connected to GND even if VCRC= "0". When the CIO pin = "0", the VCRC pin follows the setting of VCRC bit. CIO: VCRC pin I/O control Please refer Table 16.
MS0451-E-01 - 41 -
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[AK4705]
Addr 06H
Register Name Video volume R/W default
D7
CLAMPB
D6
VCLP1 0
D5
VCLP0
D4
CLAMP2
D3
CLAMP1
D2
CLAMP0
D1
VVOL1
D0
VVOL0
R/W 0 0 0 0 1 0 0
VVOL1-0: RGB video gain control 00: +6dB (default) 01: +7.2dB 10: +8.2dB 11: +9.1dB CLAMPB, CLAMP2-0: Clamp control. Refer Table 18, Table 19 and Table 20. VCLP1-0: DC restore source control 00: ENCV pin (default) 01: ENCY pin 10: VCRVIN pin 11: (Reserved) When the AUTO bit = "1", the source is fixed to VCRVIN pin. Addr 07H Register Name S/F Blanking R/W default D7 SBIO1 0 D6 SBIO0
0
D5 SBV1 0
D4 SBV0 R/W 0
D3 SBT1 0
D2 SBT0 0
D1 FB1 0
D0 FB0 0
FB1-0: TV Fast Blanking output control (for TVFB pin) 00: 0V (default) 01: 4V 10: follow VCR FB input (4V/0V) 11: (Reserved) SBT1-0: TV Slow Blanking output control (for TVSB pin. Minimum load is 10kohm.) 00: <2V (default) 01: 5V to 7V 10: (Reserved) 11: 10V< SBV1-0: VCR Slow Blanking output control (for VCRSB pin. Minimum load is 10kohm) 00: <2V (default) 01: 5V to 7V 10: (Reserved) 11: 10V< SBIO1-0: TV/VCR Slow Blanking I/O control (Table 25)
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[AK4705]
Addr 08H
Register Name Monitor R/W default
D7 0 0
D6 0
0
D5 0 0
D4 TVMON 0 READ
D3 VCMON 0
D2 FVCR 0
D1 SVCR1 0
D0 SVCR0 0
SVCR1-0: VCR Slow blanking status monitor SVCR1-0 reflect the voltage at VCRSB pin only when the VCRSB is in the input mode. When the VCRSB is in the output mode, SVCR1-0 hold previous value.
VCRSB pin input level SVCR1 SVCR0 < 2V 0 0 4.5 to 7V 0 1 (Reserved) 1 0 9.5< 1 1 Table 31. VCR Slow Blanking monitor FVCR: VCR Fast blanking input level monitor This bit is enabled when TVFB bit = "1". VCRFB pin input level FVCR <0.4V 0 1 V< 1 Table 32. VCR Fast Blanking monitor (Typical threshold is 0.7V) VCMON : TVMON : Refer Table 28.
Addr
09H
Register Name
Monitor mask
D7
MCOMN
D6
0 0
D5
0
D4
MTV
D3
MVC
D2
MFVCR
D1
MSVCR
D0
0
R/W default
R/W 0 0 0 1 0 0 0
MSVCR: SVCR1-0 Monitor mask. 0: The INT pin reflects the change of SVCR1-0 bits. (default) 1: The INT pin does not reflect the change of SVCR1-0 bit. MFVCR: FVCR Monitor mask. 0: The INT pin reflects the change of MFVCR bit. (default) 1: The INT pin does not reflect the change of MFVCR bit. MVC: MTV: Refer Table 29, Table 30.
MCOMN:.
Refer Table 28.
MS0451-E-01 - 43 -
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[AK4705]
SYSTEM DESIGN
RFV MONOOUT
CVBS Audio MONO
RF Mod
Phono
TVOUTL TVOUTR TVRC TVG TVB TVFB TVVOUT CVBS/Y Y C Encoder R/C G/CVBS B MCLK MPEG Decoder BICK LRCK SDATA SCK SDA PDN Interrupt ENCV ENCY ENCC ENCRC ENCGV ENCB MCLK BICK LRCK SDTI SCK SDA PDN INT TVVIN TVINL TVINR TVSB VCRFB VCRVIN VCRRC VCRC VCRG VCRB VCRINL Micro Processor VCRINR VCRVOUT VCROUTL VCROUTR VCRSB
Audio L Audio R R/C G B Fast Blank Y/CVBS Y/CVBS Audio L Audio R Slow Blank Fast Blank Y/CVBS R/C TV SCART
G B Audio L Audio R Y/CVBS Audio L Audio R Slow Blank VCR SCART
Figure 19. Typical Connection Diagram
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[AK4705]
Grounding and Power Supply Decoupling
VD, VP, VVD1, VVD2, VSS and VVSS should be supplied from analog supply unit with low impedance and be separated from system digital supply. An electrolytic capacitor 10F parallel with a 0.1F ceramic capacitor should be attached to these pins to eliminate the effects of high frequency noise. The 0.1F ceramic capacitors should be placed as near to VD (VP, VVD1, VVD2) as possible.
Voltage Reference
DVCOM and PVCOM are signal ground of this chip. An electrolytic capacitor 10F parallel with a 0.1F ceramic capacitor should be attached to these VCOM pins to eliminate the effects of high frequency noise. No load current may be taken from these VCOM pins. All signals, especially clocks, should be kept away from these VCOM pins in order to avoid unwanted coupling into the AK4705.
Analog Audio Outputs
The analog outputs are also single-ended and centered on 5.6V(typ.). The output signal range is typically 2Vrms (typ@VD=5V). The internal switched-capacitor filter and continuous-time filter attenuate the noise generated by the delta-sigma modulator beyond the audio pass band. Therefore, any external filters are not required for typical application. The output voltage is a positive full scale for 7FFFFFH (@24bit) and a negative full scale for 800000H (@24bit). The ideal output is 5.6V(typ.) for 000000H (@24bit). The DC voltage on analog outputs are eliminated by AC coupling.
REFI pin
The REFI pin is video current reference pin. This pin should be connected to VVD1 through a 10k1% resistor externally as shown in Figure 20. No load current may be drawn from this pin. All signals, especially clocks, should be kept away from this pin in order to avoid unwanted coupling.
AK4705
VDD1 R=10k1% IREF
Figure 20. REFI pin
MS0451-E-01 - 45 -
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[AK4705]
External Circuit Example
Analog Audio Input pin
300ohm TVINL/R VCRINL/R DACL/R
(Cable)
0.47F
Analog Audio Output pin
MONOOUT TVOUTL/R VCROUTL/R
10F
300ohm
(Cable)
Total > 4.5kohm
Analog Video Input pin
ENCV, ENCY, VCRVIN, TVVIN, ENCRC, ENCC, VCRRC, ENCG, VCRG, ENCB, VCRB
75ohm
(Cable) 75ohm
0.1F
Analog Video Output pin
TVVOUT, TVRC TVG, TVR, RFV VCRVOUT, VCRC max 15pF 75ohm
(Cable) max 400pF 75ohm
MS0451-E-01 - 46 -
2007/06
[AK4705]
Slow Blanking pin
TVSB VCRSB 400ohm
(max 500ohm)
(Cable) max 3nF (with 400ohm) min: 10k ohm
Fast Blanking Input pin
VCRFB 75ohm (Cable) 75ohm
Fast Blanking Output pin
75ohm TVFB (Cable) 75ohm
MS0451-E-01 - 47 -
2007/06
[AK4705]
PACKAGE
48pin LQFP(Unit:mm)
9.0 0.2 7.0 36 37 25 24 9.0 0.2
1.70Max 0.13 0.13 1.40 0.05
48 1 0.5 0.22 0.08 12
13
7.0
0.145 0.05 0.10 M
0 10
0.10
0.5 0.2
Package & Lead frame material
Package molding compound: Lead frame material: Lead frame surface treatment: Epoxy Cu Solder (Pb free) plate
MS0451-E-01 - 48 -
2007/06
[AK4705]
MARKING
AK4705VQ XXXXXXX
1
XXXXXXXX: Date code identifier
REVISION HISTORY
Date (YY/MM/DD) 05/12/14 07/06/06 Revision 00 01 Reason First Edition Description Addition Error Correction Page Contents "The 60k is attached for ENCC pin, ENCRC (chroma mode) pin and VCRRC (chroma mode) pin." was added. Table 28 was revised. Table 29 was corrected.
10 32 33
MS0451-E-01 - 49 -
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[AK4705]
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.
MS0451-E-01 - 50 -
2007/06

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