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STA013 STA013B STA013T
MPEG 2.5 LAYER III AUDIO DECODER
SINGLE CHIP MPEG2 LAYER 3 DECODER SUPPORTING: - All features specified for Layer III in ISO/IEC 11172-3 (MPEG 1 Audio) - All features specified for Layer III in ISO/IEC 13818-3.2 (MPEG 2 Audio) - Lower sampling frequencies syntax extension, (not specified by ISO) called MPEG 2.5 DECODES LAYER III STEREO CHANNELS, DUAL CHANNEL, SINGLE CHANNEL (MONO) SUPPORTING ALL THE MPEG 1 & 2 SAMPLING FREQUENCIES AND THE EXTENSION TO MPEG 2.5: 48, 44.1, 32, 24, 22.05, 16, 12, 11. 025, 8 KHz ACCEPTS MPEG 2.5 LAYER III ELEMENTARY COMPRESSED BITSTREAM WITH DATA RATE FROM 8 Kbit/s UP TO 320 Kbit/s DIGITAL VOLUME CONTROL DIGITAL BASS & TREBLE CONTROL SERIAL BITSTREAM INPUT INTERFACE ANCILLARY DATA EXTRACTION VIA I2C INTERFACE. SERIAL PCM OUTPUT INTERFACE (I2S AND OTHER FORMATS) PLL FOR INTERNAL CLOCK AND FOR OUTPUT PCM CLOCK GENERATION LOW POWER CONSUMPTION: 85mW AT 2.4V CRC CHECK AND SYNCHRONISATION ERROR DETECTION WITH SOFTWARE INDICATORS I2C CONTROL BUS LOW POWER 3.3V CMOS TECHNOLOGY 10 MHz, 14.31818 MHz, OR 14.7456 MHz EXTERNAL INPUT CLOCK OR BUILT-IN INDUSTRY STANDARD XTAL OSCILLATOR DIFFERENT FREQUENCIES MAY BE SUPPORTED UPON REQUEST TO STM
SO28
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TQFP44
LFBGA64
ORDERING NUMBERS: STA013$ (SO28) STA013T$ (TQFP44) STA013B$ (LFBGA 8x8)
APPLICATIONS PC SOUND CARDS MULTIMEDIA PLAYERS
DESCRIPTION The STA013 is a fully integrated high flexibility MPEG Layer III Audio Decoder, capable of decoding Layer III compressed elementary streams, as specified in MPEG 1 and MPEG 2 ISO standards. The device decodes also elementary streams compressed by using low sampling rates, as specified by MPEG 2.5. STA013 receives the input data through a Serial Input Interface. The decoded signal is a stereo, mono, or dual channel digital output that can be sent directly to a D/A converter, by the PCM Output Interface. This interface is software programmable to adapt the STA013 digital output to the most common DACs architectures used on the market. The functional STA013 chip partitioning is described in Fig.1.
February 2004
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STA013 - STA013B - STA013T
Figure 1. Block Diagram: MPEG 2.5 Layer III Decoder Hardware Partitioning.
RESET 26
SDA 3
SCL 4
I2C CONTROL
SDI SCKR BIT_EN
5 6 7 SERIAL INPUT INTERFACE MPEG 2.5 LAYER III DECODER CORE CHANNEL CONFIG. & VOLUME CONTROL OUTPUT BUFFER PCM OUTPUT INTERFACE
9 10 11
SDO SCKT LRCKT
BUFFER
PARSER
SYSTEM & AUDIO CLOCKS
TEST INTERFACE
8 SRC_INT
28 OUT_CLK/DATA_REQ
21 XTI
20 XTO
12 OCLK
24 TESTEN
25 SCANEN
D98AU965
THERMAL DATA
Symbol Rth j-amb Parameter Thermal resistance Junction to Ambient Value 85 Unit C/W
ABSOLUTE MAXIMUM RATINGS
Symbol VDD Vi VO Tstg Toper Tj Parameter Power Supply Voltage on Input pins Voltage on output pins Storage Temperature Operative ambient temp Operating Junction Temperature Value -0.3 to 4 -0.3 to VDD +0.3 -0.3 to VDD +0.3 -40 to +150 -40 to +85 (*) -40 to 125 Unit V V V C C C
(*) guaranteed by design.
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STA013 - STA013B - STA013T
Figure 2. Pin Connection
VDD_1 VSS_1 SDA SCL SDI SCKR BIT_EN SRC_INT SDO SCKT LRCKT OCLK VSS_2 VDD_2 1 2 3 4 5 6 7 8 9 10 11 12 13 14
D98AU911A
28 27 26 25 24 23
OUT_CLK/DATA_REQ VSS_5 RESET SCANEN TESTEN VDD_4 VSS_4 XTI XTO FILT PVSS PVDD VDD_3 VSS_3
SO28
22 21 20 19 18 17 16 15
SRC_INT
BIT_EN
SCKR
SCKT
SDO
N.C.
N.C.
N.C.
N.C.
N.C.
35
44
43
42
41
40
39
38
37
36
34 33 32 31 30 29
N.C. LRCKT OCLK N.C. VSS_2 VDD_2 VSS_3 VDD_3 N.C. PVDD PVSS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
SDI
N.C. SCL SDA VSS_1 VDD_1 N.C. OUT_CLK/DATA_REC VSS_5 RESET SCANEN N.C.
TQFP44
28 27 26 25 24 23
TESTEN
VSS_4
VDD_4
N.C.
N.C.
N.C.
XTO
N.C.
FILT
N.C.
XTI
D99AU1019
8 A B C D E F G H
7
6
5
4
3
2
1 A1 = SDI B2 = SCKR D4 = BIT_EN D1 = SRC_INT E2 = SDO F2 = SCKT H1 = LRCKT H3 = OCLK F3 = VSS_2 E4 = VDD_2 G4 = VSS_3 G5 = VDD_3 F5 = PVDD G6 = PVSS G7 = FILT G8 = XTO F7 = XTI E7 = VSS4 C8 = VDD4 D7 = TESTEN A7 = SCANEN B6 = RESET A5 = VSS5 C5 = OUT_CLK/DATA_REQ B5 = VDD1 B4 = VSS1 A4 = SDA B3 = SCL
D99AU1085
LFBGA64
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STA013 - STA013B - STA013T
PIN DESCRIPTION
SO28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 TQFP44 LFBGA64 29 30 31 32 34 36 38 40 42 44 2 3 5 6 7 8 10 11 12 13 15 19 21 22 24 25 26 27 B5 B4 A4 B3 A1 B2 D4 D1 E2 F2 H1 H3 F3 E4 G4 G5 F5 G6 G7 G8 F7 E7 C8 D7 A7 B6 A5 C5 Pin Name VDD_1 VSS_1 SDA SCL SDI SCKR BIT_EN SRC_INT SDO SCKT LRCKT OCLK VSS_2 VDD_2 VSS_3 VDD_3 PVDD PVSS FILT XTO XTI VSS_4 VDD_4 TESTEN SCANEN RESET VSS_5 OUT_CLK/ DATA_REQ O I I I O O I I/O I I I I I O O O I/O Type Function Supply Voltage Ground i2C Serial Data + Acknowledge I2C Serial Clock Receiver Serial Data Receiver Serial Clock Bit Enable Interrupt Line For S.R. Control Transmitter Serial Data (PCM Data) Transmitter Serial Clock Transmitter Left/Right Clock Oversampling Clock for DAC Ground Supply Voltage Ground Supply Voltage PLL Power PLL Ground PLL Filter Ext. Capacitor Conn. Crystal Output Crystal Input (Clock Input) Ground Supply Voltage Test Enable Scan Enable System Reset Ground Buffered Output Clock/ Data Request Signal CMOS 4mA Output Drive CMOS Input Pad Buffer with pull up CMOS Input Pad Buffer CMOS Input Pad Buffer with pull up CMOS 4mA Output Drive Specific Level Input Pad (see paragraph 2.1) CMOS Input Pad Buffer CMOS 4mA Output Drive CMOS Input Pad Buffer CMOS Input Pad Buffer CMOS Input Pad Buffer CMOS Input Pad Buffer with pull up CMOS Input Pad Buffer CMOS 4mA Output Drive CMOS 4mA Output Drive CMOS 4mA Output Drive CMOS Input Pad Buffer CMOS 4mA Output Drive PAD Description
Note: SRC_INT signal is used by STA013 internal software in Broadcast Mode only; in Multimedia mode SRC_INT must be connected to VDD In functional mode TESTEN must be connected to VDD, SCANEN to ground.
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STA013 - STA013B - STA013T
1. ELECTRICAL CHARACTERISTICS: VDD = 2.7V 0.3V; Tamb = 0 to 70C; Rg = 50 unless otherwise specified DC OPERATING CONDITIONS
Symbol VDD Power Supply Voltage Parameter Value 2.4 to 3.6V
GENERAL INTERFACE ELECTRICAL CHARACTERISTICS
Symbol IIL IIH Vesd Parameter Low Level Input Current Without pull-up device High Level Input Current Without pull-up device Electrostatic Protection Test Condition Vi = 0V Vi = VDD = 3.6V Leakage < 1A Min. -10 -10 2000 Typ. Max. 10 10 Unit A A V Note 1 1 2
Note 1: The leakage currents are generally very small, < 1nA. The value given here is a maximum that can occur after an electrostatic stress on the pin. Note 2: Human Body Model.
DC ELECTRICAL CHARACTERISTICS
Symbol VIL VIH Vol Voh Parameter Low Level Input Voltage High Level Input Voltage Low Level Output Voltage High Level Output Voltage Iol = Xma 0.85*VDD Test Condition Min. 0.8*VDD 0.4V Typ. Max. 0.2*VDD Unit V V V V 1, 2 1, 2 Note
Note 1: Takes into account 200mV voltage drop in both supply lines. Note 2: X is the source/sink current under worst case conditions and is reflected in the name of the I/O cell according to the drive capability.
Symbol Ipu Rpu
Parameter Pull-up current Equivalent Pull-up Resistance
Test Condition Vi = 0V; pin numbers 7, 24 and 26; VDD = 3V
Min. -25
Typ. -66 50
Max. -125
Unit A k
Note 1
Note 1: Min. condition: VDD = 2.4V, 125C Min process Max. condition: VDD = 3.6V, -20C Max.
POWER DISSIPATION
Symbol PD Parameter Power Dissipation @ VDD = 3V Test Condition Sampling_freq 24 kHz Sampling_freq 32 kHz Sampling_freq 48 kHz Min. Typ. 76 79 85 Max. Unit mW mW mW Note
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STA013 - STA013B - STA013T
Figure 3. Test Circuit
OUT_CLK/DATA_REQ VDD 100nF VSS VDD 100nF VSS VDD 100nF VSS VDD 100nF VSS VDD 4.7F PVDD 4.7F PVDD VSS PVSS PVSS
D98AU966
28 1
3 4 9 10 11 12
SDA SCL SDO SCKT LRCKT OCLK SDI SCKR BIT_EN SCR_INT XTI XTO 10K
2 14
13 16
5 6 7 8 21 20
15 23
22 17 100nF 18 27 26 RESET 25 SCANEN 24
19
TESTEN 470pF
1K 4.7nF
PVSS
Figure 4. Test Load Circuit
VDD IOL
Test Load
Output SDA Other Outputs
VREF
IOL 1mA 100A
IOH 100A
CL 100pF 100pF
VREF 3.6V 1.5V
OUTPUT
CL
IOH
D98AU967
2. FUNCTIONAL DESCRIPTION 2.1 - Clock Signal The STA013 input clock is derivated from an external source or from a industry standard crystal oscillator, generating input frequencies of 10, 14.31818 or 14.7456 MHz.
Symbol VIL VIH Parameter Low Level Input Voltage High Level Input Voltage
Other frequencies may be supported upon request to STMicroelectronics. Each frequency is supported by downloading a specific configuration file, provided by STM XTI is an input Pad with specific levels.
Test Condition Min. VDD-0.8 Typ. Max. VDD-1.8 Unit V V
CMOS compatibility The XTI pad low and high levels are CMOS compatible; XTI pad noise margin is better than typical CMOS pads. TTL compatibility The XTI pad low level is compatible with TTL while the high level is not compatible (for example if VDD = 3V TTL min high level = 2.0V while XTI min high level = 2.2V)
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STA013 - STA013B - STA013T
Figure 5. MPEG Decoder Interfaces.
P
XTI XTO FILT IIC
SCL
SDA
DATA_REQ SDI DATA SOURCE SCKR BIT_EN
PLL
IIC SDO
MPEG DECODER
SERIAL AUDIO INTERFACE RX TX
SCKT LRCKT
DAC
OCLK
D98AU912
Figure 6. Serial Input Interface Clocks
SDI DATA IGNORED
SCKR
SCLK_POL=0
SCKR
SCLK_POL=4
BIT_EN
DATA VALID
D98AU968A
DATA IGNORED
2.2 - Serial Input Interface STA013 receives the input data (MSB first) thought the Serial Input Interface (Fig.5). It is a serial communication interface connected to the SDI (Serial Data Input) and SCKR (Receiver Serial Clock). The interface can be configured to receive data sampled on both rising and falling edge of the SCKR clock. The BIT_EN pin, when set to low, forces the bitstream input interface to ignore the incoming data. For proper operation Bit-EN line shold be toggled only when SCR is stable low (for both SCLK_POL configuration) The possible configurations are described in Fig. 6.
2.3 - PLL & Clock Generator System When STA013 receives the input clock, as described in Section 2.1, and a valid layer III input bit stream, the internal PLL locks, providing to the DSP Core the master clock (DCLK), and to the Audio Output Interface the nominal frequencies of the incoming compressed bit stream. The STA013 PLL block diagram is described in Figure 7. The audio sample rates are obtained dividing the oversampling clock (OCLK) by software programmable factors. The operation is done by STA013 embedded software and it is transparent to the user. The STA013 PLL can drive directly most of the commercial DACs families, providing an over sampling clock, OCLK, obtained dividing the VCO frequency with a software programmable dividers.
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STA013 - STA013B - STA013T
Figure 7. PLL and Clocks Generation System
XTI
N
PFD
CP
C
R C
M
VCO
Disable PLL
FRAC
Switching Circuit
XTI2OCLK
OCLK
X
DCLK
Update FRAC
S
XTI2DSPCLK
2.4 - PCM Output Interface The decoded audio data are output in serial PCM format. The interface consists of the following signals: SDO PCM Serial Data Output SCKT PCM Serial Clock Output LRCLK Left/Right Channel Selection Clock The output samples precision is selectable from Figure 8. PCM Output Formats
16 SCLK Cycles LRCKT 16 SCLK Cycles
16 to 24 bits/word, by setting the output precision with PCMCONF (16, 18, 20 and 24 bits mode) register. Data can be output either with the most significant bit first (MS) or least significant bit first (LS), selected by writing into a flag of the PCMCONF register. Figure 8 gives a description of the several STA013 PCM Output Formats. The sample rates set decoded by STA013 is described in Table 1.
16 SCLK Cycles 16 SCLK Cycles
L S M S L S
16 SCLK Cycles
SDO
M S
L S
M S
L S
M S
PCM_ORD = 0 PCM_PREC is 16 bit mode PCM_ORD = 1 PCM_PREC is 16 bit mode
SDO
L S
M S
L S
M S
L S
M S
L S
M S
32 SCLK Cycles LRCKT 32 SCLK Cycles
32 SCLK Cycles 32 SCLK Cycles
M S
32 SCLK Cycles
SDO
M S
L S
0
L S
M S
L S
0
L S
M S
L S
0
L S
L S
0
PCM_FORMAT = 1 PCM_DIFF = 1
L S
SDO
0
M S
M S
0
M S
0
M S
M S
0
M S
M S
PCM_FORMAT = 0 PCM_DIFF = 0 PCM_FORMAT = 0 PCM_DIFF = 1
SDO
0
L S
0
L S
0M S
L S
0
L S
0
L S
0
L S
0
L S
0
L S
SDO
MSB
M S
MSB
M S
MSB
M S
MSB
M S
PCM_FORMAT = 1 PCM_DIFF = 1
Table 1: MPEG Sampling Rates (KHz)
MPEG 1 48 44.1 32 8/38 MPEG 2 24 22.05 16 MPEG 2.5 12 11.025 8
STA013 - STA013B - STA013T
the configuration register of the device. The DAC connected to STA013 can be initialised during this mode (set MUTE to 1).
PLAY X X MUTE 0 1 Clock State Not Running Running PCM Output 0 0
2.5 - STA013 Operation Mode The STA013 can work in two different modes, called Multimedia Mode and Broadcast Mode. In Multimedia Mode, STA013 decodes the incoming bitstream, acting as a master of the data communication from the source to itself. This control is done by a specific buffer management, controlled by STA013 embedded software. The data source, by monitoring the DATA_REQ line, send to STA013 the input data, when the signal is high (default configuration). The communication is stopped when the DATA_REQ line is low. In this mode the fractional part of the PLL is disabled and the audio clocks are generated at nominal rates. Fig. 9 describes the default DATA_REQ signal behaviour. Programming STA013 it is possible to invert the polarity of the DATA_REQ line (register REQ_POL). Figure 9.
Init Mode "PLAY" and "MUTE" changes are ignored in this mode. The internal state of the decoder will be updated only when the decoder changes from the state "init" to the state "decode". The "init" phase ends when the first decoded samples are at the output stage of the device. Decode Mode This mode is completely described by the following table:
PLAY 0 0 MUTE 0 1 0 1 Clock State Not Running Running Running Running PCM Output 0 0 Decoded Samples 0 Decoding No No Yes Yes
SOURCE STOPS TRANSMITTING DATA DATA_REQ
SOURCE STOPS TRANSMITTING DATA
1
SOURCE SEND DATA TO STA013
D98AU913
1
In Broadcast Mode, STA013 works receiving a bitstream with the input speed regulated by the source. In this configuration the source has to guarantee that the bitrate is equivalent to the nominal bitrate of the decoded stream. To compensate the difference between the nominal and the real sampling rates, the STA013 embedded software controls the fractional PLL operation. Portable or Mobile applications need normally to operate in Broadcast Mode. In both modes the MPEG Synchronisation is automatic and transparent to the user. To operate in Multimedia mode, the STA013, pin nr. 8, SCR-INT must be connected to VDD on the application board. 2.6 - STA013 Decoding States There are three different decoder states: Idle, Init, and Decode. Commands to change the decoding states are described in the STA013 I2C registers description. Idle Mode In this mode the decoder is waiting for the RUN command. This mode should be used to initialise
3 - I2C BUS SPECIFICATION The STA013 supports the I2C protocol. This protocol defines any device that sends data on to the bus as a transmitter and any device that reads the data as a receiver. The device that controls the data transfer is known as the master and the others as the slave. The master always starts the transfer and provides the serial clock for synchronisation. The STA013 is always a slave device in all its communications. 3. 1 - COMMUNICATION PROTOCOL 3.1.0 - Data transition or change Data changes on the SDA line must only occur when the SCL clock is low. SDA transition while the clock is high are used to identify START or STOP condition. 3.1.1 - Start condition START is identified by a high to low transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A START condition must precede any command for data transfer.
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3.1.2 - Stop condition STOP is identified by low to high transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A STOP condition terminates communications between STA013 and the bus master. 3.1.3 - Acknowledge bit An acknowledge bit is used to indicate a successful data transfer. The bus transmitter, either master or slave, releases the SDA bus after sending 8 bit of data. During the 9th clock pulse the receiver pulls the SDA bus low to acknowledge the receipt of 8 bits of data. 3.1.4 - Data input During the data input the STA013 samples the SDA signal on the rising edge of the clock SCL. For correct device operation the SDA signal has to be stable during the rising edge of the clock and the data can change only when the SCL line is low. 3.2 - DEVICE ADDRESSING To start communication between the master and the STA013, the master must initiate with a start condition. Following this, the master sends onto the SDA line 8 bits (MSB first) corresponding to the device select address and read or write mode. Figure 10. Write Mode Sequence
ACK BYTE WRITE START DEV-ADDR SUB-ADDR ACK
The 7 most significant bits are the device address identifier, corresponding to the I2C bus definition. For the STA013 these are fixed as 1000011. The 8th bit (LSB) is the read or write operation RW, this bit is set to 1 in read mode and 0 for write mode. After a START condition the STA013 identifies on the bus the device address and, if a match is found, it acknowledges the identification on SDA bus during the 9th bit time. The following byte after the device identification byte is the internal space address. 3.3 - WRITE OPERATION (see fig. 10) Following a START condition the master sends a device select code with the RW bit set to 0. The STA013 acknowledges this and waits for the byte of internal address. After receiving the internal bytes address the STA013 again responds with an acknowledge. 3.3.1 - Byte write In the byte write mode the master sends one data byte, this is acknowledged by STA013. The master then terminates the transfer by generating a STOP condition. 3.3.2 - Multibyte write The multibyte write mode can start from any internal address. The transfer is terminated by the master generating a STOP condition.
ACK DATA IN
RW
STOP
ACK MULTIBYTE WRITE START DEV-ADDR SUB-ADDR
ACK DATA IN
ACK DATA IN
ACK
RW
D98AU825B
STOP
Figure 11. Read Mode Sequence
ACK CURRENT ADDRESS READ START NO ACK
DEV-ADDR
DATA
RW ACK ACK SUB-ADDR
STOP ACK DEV-ADDR DATA NO ACK
RANDOM ADDRESS READ START
DEV-ADDR
RW RW= ACK HIGH DEV-ADDR DATA
START ACK DATA
RW ACK DATA NO ACK
STOP
SEQUENTIAL CURRENT READ START
STOP ACK ACK SUB-ADDR DEV-ADDR ACK DATA ACK DATA ACK DATA NO ACK
SEQUENTIAL RANDOM READ START
DEV-ADDR
RW
START
RW
D98AU826A
STOP
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STA013 - STA013B - STA013T
3.4 - READ OPERATION (see Fig. 11) 3.4.1 - Current byte address read The STA013 has an internal byte address counter. Each time a byte is written or read, this counter is incremented. For the current byte address read mode, following a START condition the master sends the device address with the RW bit set to 1. The STA013 acknowledges this and outputs the byte addressed by the internal byte address counter. The master does not acknowledge the received byte, but terminates the transfer with a STOP condition. 3.4.2 - Sequential address read This mode can be initiated with either a current address read or a random address read. However in this case the master does acknowledge the data byte output and the STA013 continues to output the next byte in sequence. To terminate the streams of bytes the master does not acknowledge the last received byte, but
terminates the transfer with a STOP condition. The output data stream is from consecutive byte addresses, with the internal byte address counter automatically incremented after one byte output. 4 - I2C REGISTERS The following table gives a description of the MPEG Source Decoder (STA013) register list. The first column (HEX_COD) is the hexadecimal code for the sub-address. The second column (DEC_COD) is the decimal code. The third column (DESCRIPTION) is the description of the information contained in the register. The fourth column (RESET) inidicate the reset value if any. When no reset value is specifyed, the default is "undefined". The fifth column (R/W) is the flag to distinguish register "read only" and "read and write", and the useful size of the register itself. Each register is 8 bit wide. The master shall operate reading or writing on 8 bits only.
I2C REGISTERS
HEX_COD $00 $01 $05 $06 $07 $0B $0C $0D $0F $10 $13 $14 $16 $18 $40 $41 $42 DEC_COD 0 1 5 6 7 11 12 13 15 16 19 20 22 24 64 65 66 DESCRIPTION VERSION IDENT PLLCTL [7:0] PLLCTL [20:16] (MF[4:0]=M) PLLCTL [15:12] (IDF[3:0]=N) reserved REQ_POL SCLK_POL ERROR_CODE SOFT_RESET PLAY MUTE CMD_INTERRUPT DATA_REQ_ENABLE SYNCSTATUS ANCCOUNT_L ANCCOUNT_H RESET 0xAC 0xA1 0x0C 0x00 0x01 0x04 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 R/W R (8) R (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R (8) W (8) R/W(8) R/W(8) R/W(8) R/W(8) R (8) R (8) R (8)
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STA013 - STA013B - STA013T
I2C REGISTERS (continued)
HEX_COD $43 $44 $45 $46 $47 $48 $49 $50 $51 $52 $54 $55 $56 $59 $5A $5B $5C $5D $61 $63 $64 $65 $67 $68 $69 $6A $71 $72 $77 $78 $79 $7A $7B $7C $7D
Note: 1) The HEX_COD is the hexadecimal adress that the microcontroller has to generate to access the information. 2) RESERVED: register used for production test only, or for future use.
DEC_COD 67 68 69 70 71 72 73 80 81 82 84 85 86 89 90 91 92 93 97 99 100 101 103 104 105 106 113 114 119 120 121 122 123 124 125 HEAD_H[23:16] HEAD_M[15:8] HEAD_L[7:0] DLA DLB DRA DRB MFSDF_441 PLLFRAC_441_L PLLFRAC_441_H PCM DIVIDER PCMCONF
DESCRIPTION
RESET 0x00 0x00 0x00 0x00 0xFF 0x00 0xFF 0x00 0x00 0x00 0x03 0x21 0x00 0x00 0x00 0x00 0x00 0x00 0x07 0x00 0x46 0x5B 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
R/W R(8) R(8) R(8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R (8) R (8) R (8) R (8) R (8) R/W (8) R/W (8) R/W (8) R/W (8) R (8) R (8) R (8) R (8) R (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8) R/W (8)
PCMCROSS ANC_DATA_1 [7:0] ANC_DATA_2 [15:8] ANC_DATA_3 [23:16] ANC_DATA_4 [31:24] ANC_DATA_5 [39:32] MFSDF (X) DAC_CLK_MODE PLLFRAC_L PLLFRAC_H FRAME_CNT_L FRAME_CNT_M FRAME_CNT_H AVERAGE_BITRATE SOFTVERSION RUN TREBLE_FREQUENCY_LOW TREBLE_FREQUENCY_HIGH BASS_FREQUENCY_LOW BASS_FREQUENCY_HIGH TREBLE_ENHANCE BASS_ENHANCE TONE_ATTEN
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STA013 - STA013B - STA013T
4.1 - STA013 REGISTERS DESCRIPTION The STA013 device includes 128 I2C registers. In this document, only the user-oriented registers are described. The undocumented registers are reserved. These registers must never be accessed (in Read or in Write mode). The ReadOnly registers must never be written. The following table describes the meaning of the abbreviations used in the I2C registers description:
Symbol NA UND NC RO WO R/W R/WS Comment Not Applicable Undefined No Charge Read Only Write Only Read and Write Read, Write in specific mode
MSB
LSB
b7 b6 b5 b4 b3 b2 b1 b0 XTO_ XTOD OCLK SYS2O PPLD XTI2DS XTI2O UPD_F BUF IS EN CLK IS PCLK CLK RAC
VERSION Address: 0x00 Type: RO
MSB b7 V8 b6 V7 b5 V6 b4 V5 b3 V4 b2 V3 b1 V2 LSB b0 V1
UPD_FRAC: when is set to 1, update FRAC in the switching circuit. It is set to 1 after autoboot. XTI2OCLK: when is set to 1, use the XTI as input of the divider X instead of VCO output. It is set to 0 on HW reset. XTI2DSPCLK: when is to 1, set use the XTI as input of the divider S instead of VCO output. It is set to 0 on HW reset. PLLDIS: when set to 1, the VCO output is disabled. It is set to 0 on HW reset. SYS2OCLK: when is set to 1, the OCLK frequency is equal to the system frequency. It is useful for testing. It is set to 0 on HW reset. OCLKEN: when is set to 1, the OCLK pad is enable as output pad. It is set to 1 on HW reset. XTODIS: when is set to 1, the XTO pad is disable. It is set to 0 on HW reset. XTO_BUF: when this bit is set, the pin nr. 28 (OUT_CLOCK/DATA_REQ) is enabled. It is set to 0 after autoboot.
PLLCTL (M) Address: 0x06 Type: R/W Software Reset: 0x0C Hardware Reset: 0x0C PLLCTL (N) Address: 0x07 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00 The M and N registers are used to configure the STA013 PLL by DSP embedded software. M and N registers are R/W type but they are completely controlled, on STA013, by DSP software. REQ_POL Address: 0x0C Type: R/W Software Reset: 0x01 Hardware Reset: 0x00
The VERSION register is read-only and it is used to identify the IC on the application board. IDENT Address: 0x01 Type: RO Software Reset: 0xAC Hardware Reset: 0xAC
MSB b7 1 b6 0 b5 1 b4 0 b3 1 b2 1 b1 0 LSB b0 0
IDENT is a read-only register and is used to identify the IC on an application board. IDENT always has the value "0xAC" PLLCTL Address: 0x05 Type: R/W Software Reset: 0x21 Hardware Reset: 0x21
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Hardware Reset: 0x01 The REQ_POL registers is used to program the polarity of the DATA_REQ line.
MSB b7 0 b6 0 b5 0 b4 0 b3 0 b2 0 b1 0 LSB b0 1
ERROR_CODE register contains the last error occourred if any. The codes can be as follows:
Code Description (1) 0x00 No error since the last SW or HW Reset (2) (3) 0x01 0x02 CRC Failure DATA not available
Default polarity (the source sends data when the DATA_REQ line is high)
MSB b7 0 b6 0 b5 0 b4 0 b3 0 b2 1 b1 0 LSB b0 1
SOFT_RESET Address: 0x10 Type: WO Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 0 1
Inverted polarity (the source sends data when the DATA_REQ line is low) SCKL_POL Address: 0x0D Type: R/W Software Reset: 0x04 Hardware Reset: 0x04
MSB b7 X b6 X b5 X b4 X b3 X b2 0 1 b1 0 0 LSB b0 0 0 (1) (2)
X = don't care; 0 = normal operation; 1 = reset When this register is written, a soft reset occours. The STA013 core command register and the interrupt register are cleared. The decoder goes in to idle mode. PLAY Address: 0x13 Type: R/W Software Reset: 0x01 Hardware Reset: 0x01
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 0 1
X = don't care SCKL_POL is used to select the working polarity of the Input Serial Clock (SCKR). (1) If SCKL_POL is set to 0x00, the data (SDI) are sent with the falling edge of SCKR and sampled on the rising edge. (2) If SCKL_POL is set to 0x04, the data (SDI) are sent with the rising edge of SCKR and sampled on the falling edge. ERROR_CODE Address: 0x0F Type: RO Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 0 0 0 b2 0 0 0 b1 0 0 1 LSB b0 0 1 0 (1) (2) (3)
X = don't care; 0 = normal operation; 1 = play The PLAY command is handled according to the state of the decoder, as described in section 2.5. PLAY only becomes active when the decoder is in DECODE mode.
X = don't care
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MUTE Address: 0x14 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 0 1
CMD_INTERRUPT Address: 0x16 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 0 1
X = don't care; 0 = normal operation; 1 = mute The MUTE command is handled according to the state of the decoder, as described in section 2.5. MUTE sets the clock running.
X = don't care; 0 = normal operation; 1 = write into I2C/Ancillary Data The INTERRUPT is used to give STA013 the command to write into the I2C/Ancillary Data Buffer (Registers: 0x59 ... 0x5D). Every time the Master has to extract the new buffer content (5 bytes) it writes into this register, setting it to a non-zero value.
DATA_REQ_ENABLE Address: 0x18 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X X b6 X X b5 X X b4 X X b3 X X b2 0 1 b1 X X LSB b0 X X Description buffered output clock request signal
The DATA_REQ_ENABLE register is used to configure Pin n. 28 working as buffered output clock or data request signal, used for multimedia SYNCSTATUS Address: 0x40 Type: RO Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X
mode. The buffered Output Clock has the same frequency than the input clock (XTI)
b1 SS1 0 0 1 1
LSB b0 SS0 0 1 0 1
Description Research of sync word Wait for Confirmation Synchronised not used
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ANCCOUNT_L Address: 0x41 Type: RO Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 AC7 b6 AC6 b5 AC5 b4 AC4 b3 AC3 b2 AC2 b1 AC1 LSB b0 AC0
HEAD_M[15:8]
MSB b7 H15 b6 H14 b5 H13 b4 H12 b3 H1`1 b2 H10 b1 H9 LSB b0 H8
HEAD_L[7:0]
MSB b7 H7 b6 H6 b5 H5 b4 H4 b3 H3 b2 H2 b1 H1 LSB b0 H0
ANCCOUNT_H Address: 0x42 Type: RO Software Reset: 0x00 Hardware Reset: 0x00 ANCCOUNT_H
MSB b7 b6 b5 b4 b3 b2 b1 LSB b0 AC8
AC15 AC14 AC13 AC12 AC11 AC10 AC9
ANCCOUNT registers are logically concatenated and indicate the number of Ancillary Data bits available at every correctly decoded MPEG frame. HEAD_H[23:16]
MSB b7 X b6 X b5 X b4 H20 b3 H19 b2 H18 b1 H17 LSB b0 H16
Address: 0x43, 0x44, 0x45 Type: RO Software Reset: 0x00 Hardware Reset: 0x00 Head[1:0] emphasis Head[2] original/copy Head[3] copyrightHead [5:4] mode extension Head[7:6] mode Head[8] private bit Head[9] padding bit Head[11:10] sampling frequency index Head[15:12] bitrate index Head[16] protection bit Head[18:17] layer Head[19] ID Head[20] ID_ex The HEAD registers can be viewed as logically concatenated to store the MPEG Layer III Header content. The set of three registers is updated every time the synchronisation to the new MPEG frame is achieved
x = don't care
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The meaning of the flags are shown in the following tables: MPEG IDs
IDex 0 0 1 1 ID 0 1 0 1 MPEG 2.5 reserved MPEG 2 MPEG 1
Padding bit if this bit equals '1', the frame contains an additional slot to adjust the mean bitrate to the sampling frequency, otherwise this bit is set to '0'. Private bit Bit for private use. This bit will not be used in the future by ISO/IEC. Mode Indicates the mode according to the following table. The joint stereo mode is intensity_stereo and/or ms_stereo.
mode '00' '01' '10' '11' stereo joint stereo (intensity_stereo and/or ms_stereo) dual_channel single_channel (mono) mode specified
Layer in Layer III these two flags must be set always to "01". Protection_bit It equals "1" if no redundancy has been added and "0" if redundancy has been added. Bitrate_index indicates the bitrate (Kbit/sec) depending on the MPEG ID.
bitrate index '0000' '0001' '0010' '0011' '0100' '0101' '0110' '0111' '1000' '1001' '1010' '1011' '1100' '1101' '1110' '1111' ID = 1 free 32 40 48 56 64 80 96 112 128 160 192 224 256 320 forbidden ID = 0 free 8 16 24 32 40 48 56 64 80 96 112 128 144 160 forbidden
Mode extension These bits are used in joint stereo mode. They indicates which type of joint stereo coding method is applied. The frequency ranges, over which the intensity_stereo and ms_stereo modes are applied, are implicit in the algorithm. Copyright If this bit is equal to '0', there is no copyright on the bitstream, '1' means copyright protected. Original/Copy This bit equals '0' if the bitstream is a copy, '1' if it is original. Emphasis Indicates the type of de-emphasis that shall be used.
emphasis '00' '01' '10' '11' emphasis specified none 50/15 microseconds reserved CCITT J,17
Sampling Frequency indicates the sampling frequency of the encoded audio signal (KHz) depending on the MPEG ID
Sampling Frequency '00' '01' '10' '11' MPEG1 44.1 48 32 reserved MPEG2 22.05 24 16 reserved MPEG2.5 11.03 12 8 reserved
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DLA Address: 0x46 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 DLA7 0 0 0 : 0 b6 DLA6 0 0 0 : 1 b5 DLA5 0 0 0 : 1 b4 DLA4 0 0 0 : 0 b3 DLA3 0 0 0 : 0 b2 DLA2 0 0 0 : 0 b1 DLA1 0 0 1 : 0 LSB b0 DLA0 0 1 0 : 0 Description OUTPUT ATTENUATION NO ATTENUATION -1dB -2dB : -96dB
DLA register is used to attenuate the level of audio output at the Left Channel using the butterfly shown in Fig. 12. When the register is set to Figure 12. Volume Control and Output Setup
255 (0xFF), the maximum attenuation is achieved. A decimal unit correspond to an attenuation step of 1 dB.
DSP Left Channel
DLA X DLB X DRB X DRA +
Output Left Channel
DSP Right Channel
X
+
Output Right Channel
D97AU667
DLB Address: 0x47 Type: R/W Software Reset: 0xFF Hardware Reset: 0xFF
MSB b7 DLB7 0 0 0 : 0 b6 DLB6 0 0 0 : 1 b5 DLB5 0 0 0 : 1 b4 DLB4 0 0 0 : 0 b3 DLB3 0 0 0 : 0 b2 DLB2 0 0 0 : 0 b1 DLB1 0 0 1 : 0 LSB b0 DLB0 0 1 0 : 0 Description OUTPUT ATTENUATION NO ATTENUATION -1dB -2dB : -96dB
DLB register is used to re-direct the Left Channel on the Right, or to mix both the Channels.
Default value is 0x00, corresponding at the maximum attenuation in the re-direction channel.
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DRA Address: 0x48 Type: R/W Software Reset: 0X00 Hardware Reset: 0X00
MSB b7 DRA7 0 0 0 : 0 b6 DRA6 0 0 0 : 1 b5 DRA5 0 0 0 : 1 b4 DRA4 0 0 0 : 0 b3 DRA3 0 0 0 : 0 b2 DRA2 0 0 0 : 0 b1 DRA1 0 0 1 : 0 LSB b0 DRA0 0 1 0 : 0 Description OUTPUT ATTENUATION NO ATTENUATION -1dB -2dB : -96dB
DRA register is used to attenuate the level of audio output at the Right Channel using the butterfly shown in Fig. 11. When the register is set to DRB Address: 0x49 Type: R/W Software Reset: 0xFF Hardware Reset: 0xFF
MSB b7 DRB7 0 0 0 : 0 b6 DRB6 0 0 0 : 1 b5 DRB5 0 0 0 : 1 b4 DRB4 0 0 0 : 0 b3 DRB3 0 0 0 : 0 b2 DRB2 0 0 0 : 0
255 (0xFF), the maximum attenuation is achieved. A decimal unit correspond to an attenuation step of 1 dB.
b1 DRB1 0 0 1 : 0
LSB b0 DRB0 0 1 0 : 0
Description OUTPUT ATTENUATION NO ATTENUATION -1dB -2dB : -96dB
DRB register is used to re-direct the Right Channel on the Left, or to mix both the Channels. MFSDF_441 Address: 0x50 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 M4 b3 M3 b2 M2 b1 M1 LSB b0 M0
Default value is 0x00, corresponding at the maximum attenuation in the re-direction channel. The VCO output frequency, when decoding 44.1KHz bitstream, is divided by (MFSDF_441 +1) PLLFRAC_441_L Address: 0x51 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB LSB b6 PF6 b5 PF5 b4 PF4 b3 PF3 b2 PF2 b1 PF1 b0 PF0 b7 PF7
This register contains the value for the PLL X driver for the 44.1KHz reference frequency.
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PLLFRAC_441_H Address: 0x52 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 b6 b5 b4 b3 b2 PF15 PF14 PF13 PF12 PF11 PF10 b1 PF9 LSB b0 PF8
PCMDIVIDER Address: 0x54 Type: RW Software Reset: 0x03 Hardware Reset: 0x03
7 PD7 6 PD6 5 PD5 4 PD4 3 PD3 2 PD2 1 PD1 0 PD0
The registers are considered logically concatenated and contain the fractional values for the PLL, for 44.1KHz reference frequency. (see also PLLFRAC_L and PLLFRAC_H registers)
PCMDIVIDER is used to set the frequency ratio between the OCLK (Oversampling Clock for DACs), and the SCKT (Serial Audio Transmitter Clock). The relation is the following:
SCKT_freq =
OCLK_freq 2 (1 + PCM_DIV)
The Oversampling Factor (O_FAC) is related to OCLK and SCKT by the following expression: 1) OCLK_freq = O_FAC * LRCKT_ Freq (DAC relation) 2) OCLK_ Freq = 2 * (1+PCM_DIV) * 32* LRCKT_Freq (when 16 bit PCM mode is used) 3) OCLK_ Freq = 2 * (1+PCM_DIV) * 64* LRCKT_Freq (when 32 bit PCM mode is used) 4) PCM_DIV = (O_FAC/64) - 1 in 16 bit mode 5) PCM_DIV = (O_FAC/128) - 1 in 32 bit mode Example for setting:
MSB b7 PD7 0 0 0 0 0 0 b6 PD6 0 0 0 0 0 0 b5 PD5 0 0 0 0 0 0 b4 PD4 0 0 0 0 0 0 b3 PD3 0 0 0 0 0 0 b2 PD2 1 1 0 0 0 0 b1 PD1 1 0 1 1 1 0 LSB b0 PD0 1 1 1 1 0 1 Description 16 bit mode 16 bit mode 16 bit mode 32 bit mode 32 bit mode 32 bit mode 512 x Fs 384 x Fs 256 x Fs 512 x Fs 384 x Fs 256 x Fs
for 16 bit PCM Mode O_FAC = 512 ; PCM_DIV = 7 O_FAC = 256 ; PCM_DIV = 3 O_FAC = 384 ; PCM_DIV = 5
for 32 bit PCM Mode O_FAC = 512 ; PCM_DIV = 3 O_FAC = 256 ; PCM_DIV = 1 O_FAC = 384 ; PCM_DIV = 2
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PCMCONF Address: 0x55 Type: R/W Software Reset: 0x21 Hardware Reset: 0x21
MSB b7 X X X X X X X X X X X X X X X b6 ORD 1 0 b5 DIF b4 INV b3 FOR b2 SCL LSB b1 b0 PREC (1) PREC (1) Description PCM order the LS bit is transmitted First PCM order the MS bit is transmitted First The word is right padded The word is left padded LRCKT Polarity compliant to I2S format LRCKT Polarity inverted I2S format Different formats Data are sent on the rising edge of SCKT Data are sent on the falling edge of SCKT 16 bit mode (16 slots transmitted) 18 bit mode (18 slots transmitted) 20 bit mode (20 slots transmitted) 24 bit mode (24 slots transmitted)
0 1 1 0 0 1 1 0 0 0 1 1 0 1 0 1
PCMCONF is used to set the PCM Output Interface configuration: ORD: PCM order. If this bit is set to'1', the LS Bit is transmitted first, otherwise MS Bit is transmiited first. DIF: PCM_DIFF. It is used to select the position of the valid data into the transmitted word. This setting is significant only in 18/20/24 bit/word mode.If it is set to '0' the word is right-padded, otherwise it is left-padded. INV (fig.13): It is used to select the LRCKT clock polarity. If it is set to '1' the polarity is compliant to I2S format (low -> left , high -> right), otherwise the LRCKT is inverted. The default value is '0'. (if I2S have to be selected, must be set to '1' in the STA013 configuration phase). Figure 13. LRCKT Polarity Selection
left left right INV_LRCLK=0
rising edge of SCKT and sampled on the falling. If set to '0' , the data are sent on the falling edge and sampled on the rising. This last option is the most commonly used by the commercial DACs. The default configuration for this flag is '0'. Figure 14. SCKT Polarity Selection
SCKT
SDO
INV_SCLK=0
SCKT
SDO
INV_SCLK=1
LRCKT
right
LRCKT
left
left
INV_LRCLK=1
FOR: FORMAT is used to select the PCM Output Interface format. After hw and sw reset the value is set to 0 corresponding to I2S format. SCL (fig.14): used to select the Transmitter Serial Clock polarity. If set to '1' the data are sent on the
PREC [1:0]: PCM PRECISION It is used to select the PCM samples precision, as follows: '00': 16 bit mode (16 slots transmitted) '01': 18 bit mode (32 slots transmitted) '10': 20 bit mode (32 slots transmitted) '11': 24 bit mode (32 slots transmitted) The PCM samples precision in STA013 can be 16 or 18-20-24 bits. When STA013 operates in 16 (18-20-24) bits mode, the number of bits transmitted during a LRCLT period is 32 (64).
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PCMCROSS Address: 0x56 Type: R/W Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X X X X b6 X X X X b5 X X X X b4 X X X X b3 X X X X b2 X X X X b1 0 0 1 1 LSB b0 0 1 0 1 Description Left channel is mapped on the left output. Right channel is mapped on the Right output Left channel is duplicated on both Output channels. Right channel is duplicated on both Output channels Right and Left channels are toggled
The default configuration for this register is '0x00'. ANCILLARY DATA BUFFER Address: 0x59 - 0x5D Type: RO Software Reset: 0x00 Hardware Reset: 0x00 STA013 can extract max 56 bytes/MPEG frame. To know the number of A.D. bits available every MPEG frame, the ANCCOUNT_L and ANCCOUNT_H registers (0x41 and 0x42) have to be read. The buffer dimension is 5 bytes, written by STA013 core in sequential order. The timing information to read the buffer can be obtained by reading the FRAME_CNT registers (0x67 - 0x69). To fill up the buffer with a new 5-bytes slot, the STA013 waits until a CMD_INTERRUPT register is written by the master. MFSDF (X) Address: 0x61 Type: R/W Software Reset: 0x07 Hardware Reset: 0x07
MSB b7 X b6 X b5 X b4 M4 b3 M3 b2 M2 b1 M1 LSB b0 M0
The value is changed by the internal STA013 Core, to set the clocks frequencies, according to the incoming bitstream. This value can be even set by the user to select the PCM interface configuration. The VCO output frequency is divided by (X+1). This register is a reference for 32KHz and 48 KHz input bitstream. DAC_CLK_MODE Address: 0x63 Type: RW Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 MODE
The register contains the values for PLL X divider (see Fig. 7).
This register is used to select the operating mode for OCLK clock signal. If it is set to '1', the OCLK frequency is fixed, and it is mantained to the value fixed by the user even if the sampling frequency of the incoming bitstream changes. It the MODE flag is set to '0', the OCLK frequency changes, and can be set to (512, 384, 256) * Fs. The default configuration for this mode is 256 * Fs. When this mode is selected, the default OCLK frequency is 12.288 MHz.
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PLLFRAC_L ([7:0])
MSB b7 PF7 b6 PF6 b5 PF5 b4 PF4 b3 PF3 b2 PF2 b1 PF1 LSB b0 PF0
FRAME_CNT_H
MSB b7 b6 b5 b4 b3 b2 b1 LSB b0
FC23 FC22 FC21 FC20 FC19 FC18 FC17 FC016
PLLFRAC_H ([15:8])
MSB b7 b6 b5 b4 b3 b2 b1 PF9 PF15 PF14 PF13 PF12 PF11 PF10 LSB b0 PF8
Address: 0x67, 0x68, 0x69 Type: RO Software Reset: 0x00 Hardware Reset: 0x00 The three registers are considered logically concatenated and compose the Global Frame Counter as described in the table. It is updated at every decoded MPEG Frame. The registers are reset on both hardware and software reset. AVERAGE_BITRATE Address: 0x6A Type: RO Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 AB7 b6 AB6 b5 AB5 b4 AB4 b3 AB3 b2 AB2 b1 AB1 LSB b0 AB0
Address: 0x64 - 0x65 Type: R/W Software Reset: 0x46 | 0x5B Hardware Reset: 0xNA | 0x5B The registers are considered logically concatenated and contain the fractional values for the PLL, used to select the internal configuration. After Reset, the values are NA, and the operational setting are done when the MPEG synchronisation is achieved. The following formula describes the relationships among all the STA013 fractional PLL parameters:
FRAC 1 MCLK_freq OCLK_Freq = M+1+ 65536 X + 1 N + 1
where: FRAC=256 x FRAC_H + FRAC_L (decimal) These registers are a reference for 48 / 24 / 12 / 32 / 16 / 8KHz audio. FRAME_CNT_L
MSB b7 FC7 b6 FC6 b5 FC5 b4 FC4 b3 FC3 b2 FC2 b1 FC1 LSB b0 FC0
AVERAGE_BITRATE is a read-only register and it contains the average bitrate of the incoming bitstream. The value is rounded with an accuracy of 1 Kbit/sec. SOFTVERSION Address: 0x71 Type: RO
MSB b7 SV7 b6 SV6 b5 SV5 b4 SV4 b3 SV3 b2 SV2 b1 SV1 LSB b0 SV0
FRAME_CNT_M
MSB b7 b6 b5 b4 b3 b2 b1 LSB b0 FC8
FC15 FC14 FC13 FC12 FC11 FC10 FC9
After the STA013 boot, this register contains the version code of the embedded software.
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RUN Address: 0x72 Type: RW Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 X b6 X b5 X b4 X b3 X b2 X b1 X LSB b0 RUN
BASS_FREQUENCY_LOW Address: 0x79 Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 BF7 b6 BF6 b5 BF5 b4 BF4 b3 BF3 b2 BF2 b1 BF1 LSB b0 BF0
BASS_FREQUENCY_HIGH Setting this register to 1, STA013 leaves the idle state, starting the decoding process. The Microcontroller is allowed to set the RUN flag, once all the control registers have been initialized. TREBLE_FREQUENCY_LOW Address: 0x77 Type: RW Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 TF7 b6 TF6 b5 TF5 b4 TF4 b3 TF3 b2 TF2 b1 TF1 LSB b0 TF0
Address: 0x7A Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 b6 b5 b4 b3 b2 b1 BF9 LSB b0 BF8
BF15 BF14 BF13 BF12 BF11 BF10
The registers BASS_FREQUENCY_HIGH and BASS_FREQUENCY_LOW, logically concatenated as a 16 bit wide register, are used to select the frequency, in Hz, where the selected frequency is -12dB respect to the pass-band. By setting the BASS_FREQUENCY registers, the following rules must be kept: Bass_Freq <= Treble_Freq
TREBLE_FREQUENCY_HIGH Address: 0x78 Type: RW Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 b6 b5 b4 b3 b2 b1 TF9 LSB b0 TF8
Bass_Freq > 0 (suggested range: 20 Hz < Bass_Freq < 750 Hz) Example: Bass = 200Hz Treble = 3kHz TFS
15 14 13 12 11 10 0 0 0 0 1 0 9 1 8 1 7 1 6 0 5 1 4 1 3 1 2 0 1 0 0 0
TF15 TF14 TF13 TF12 TF11 TF10
The registers TREBLE_FREQUENCY-HIGH and TREBLE_FREQUENCY-LOW, logically concatenated as a 16 bit wide register, are used to select the frequency, in Hz, where the selected frequency is +12dB respect to the stop band. By setting these registers, the following rule must be kept: Treble_Freq < Fs/2
BFS
15 14 13 12 11 10 0 0 0 0 0 0 9 0 8 0 7 1 6 1 5 0 4 0 3 1 2 0 1 0 0 0
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TREBLE_ENHANCE Address: 0x7B Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 TE7 MSB b7 0 0 0 0 b6 0 0 0 0 b5 0 0 0 0 b4 0 0 0 0 b3 1 1 1 1 b2 1 0 0 0 b1 0 1 1 0 b6 TE6 b5 TE5 b4 TE4 b3 TE3 b2 TE2 b1 TE1 LSB b0 TE0 LSB b0 0 1 0 1 . . . 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 1 . . . 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 0 0 1 0 0 0 -13.5 -15 -16.5 -18 +1 0 -1
Signed number (2 complement) This register is used to select the enhancement or attenuation STA013 has to perform on Treble Frequency range at the digital signal. A decrement (increment) of a decimal unit corresponds to a step of attenuation (enhancement) of 1.5dB. The allowed Attenuation/Enhancement range is [-18dB, +18dB].
ENHANCE/ATTENUATION 1.5dB step +18 +16.5 +15 +13.5
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BASS_ENHANCE Address: 0x7C Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 BE7 MSB b7 0 0 0 0 b6 0 0 0 0 b5 0 0 0 0 b4 0 0 0 0 b3 1 1 1 1 b2 1 0 0 0 b1 0 1 1 0 b6 BE6 b5 BE5 b4 BE4 b3 BE3 b2 BE2 b1 BE1 LSB b0 BE0 LSB b0 0 1 0 1 . . . 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 1 . . . 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 0 0 1 0 0 0 -13.5 -15 -16.5 -18 +1 0 -1
Signed number (2 complement) This register is used to select the enhancement or attenuation STA013 has to perform on Bass Frequency range at the digital signal. A decrement (increment) of a decimal unit corresponds to a step of attenuation (enhancement) of 1.5dB. The allowed Attenuation/Enhancement range is [-18dB, +18dB].
ENHANCE/ATTENUATION 1.5dB step +18 +16.5 +15 +13.5
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TONE_ATTEN Address: 0x7D Type: RW Software Reset: 0x00 Hardware Reset: 0x00
MSB b7 TA7 b6 TA6 b5 TA5 b4 TA4 b3 TA3 b2 TA2 b1 TA1 LSB b0 TA0
In the digital output audio, the full signal is achieved with 0 dB of attenuation. For this reason, before applying Bass & Treble Control, the user has to set the TONE_ATTEN register to the maximum value of enhancement is going to perform. For example, in case of a 0 dB signal (max. level) only attenuation would be possible. If enhancement is desired, the signal has to be attenuated accordingly before in order to reserve a margin in dB. An increment of a decimal unit corresponds to a Tone Attenuation step of 1.5dB.
LSB b0 0 1 0 1
. . .
MSB b7 0 0 0 0
b6 0 0 0 0
b5 0 0 0 0
b4 0 0 0 0
b3 0 0 1 0
b2 0 0 0 0
b1 0 0 1 1
ATTENUATION -1.5dB step 0dB -1.5dB -3dB -4.5dB
0 0 0
0 0 0
0 0 0
0 0 0
1 1 1
0 0 1
1 1 0
0 1 0
-15dB -16.5dB -18dB
5. GENERAL INFORMATION 5.1. MPEG 2.5 Layer III Algorithm.
DEMULTIPLEXING & ERROR CHECK
HUFFMAN DECODING
INVERSE QUANTISATION & DESCALING
IMDCT
INVERSE FILTERBANK
SIDE INFORMATION DECODING ANCILLARY DATA ENCODED AUDIO BITSTREAM (8Kbit/s ... 128Kbit/s)
STEREOPHONIC AUDIO SIGNAL (2*768Kbit/s)
D98AU903
5.2 - MPEG Ancillary Data Description: As specifyed in the ISO standard, the MPEG Layer III frames have a variable bit lenght, and are constant in time depending on the audio samTable2: MPEG Layer III Frames Time Duration
Sampling Frequency (KHz) MPEG Frame Lenght (ms) 48 24 44.1 29 32 36
pling frequencies. The time duration of the Layer III frames is shown in Tab 2.
24 24
22.5 29
16 36
12 48
11.025 48
8 72
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STA013 - STA013B - STA013T
specific register, to require the new 5 byte slot to STA003 is needed. This register is:
0x16 CMD_INTERRUPT
The Ancillary Data extraction on STA013 can be described as follow: STA013 has a specific Ancillary Data buffer, mapped into the I2C registers:
0x59 0x5A 0x5B 0x5C 0x5D ANC_DATA_1 ANC_DATA_2 ANC_DATA_3 ANC_DATA_4 ANC_DATA_5
The interrupt register, is sensitive to any non-zero value written by the Microcontroller. When this register is updated the Ancillary Data buffer is filled up with new values and the registers
0x41 0x42 ANCCOUNT_L ANCCOUNT_H
Since the content of Ancillary Data into an MPEG Frame STA013 can extract is max. 56 bytes, a
are updated (decremented) accordingly.
5.3. I/O CELL DESCRIPTION 1) CMOS Tristate Output Pad Buffer, 4mA, with Slew Rate Control / Pin numbers 9, 10, 11, 20, 28
EN Z A
D98AU904
OUTPUT PIN Z
MAX LOAD 100pF
2) CMOS Bidir Pad Buffer, 4mA, with Slew Rate Control / Pin numbers 3, 12
EN IO A
OUTPUT PIN IO
CAPACITANCE 5pF
OUTPUT PIN IO
MAX LOAD 100pF
ZI
D98AU905
3) CMOS Inpud Pad Buffer / Pin numbers 4, 5, 6, 8, 21, 25
A Z
INPUT PIN A
CAPACITANCE 3.5pF
D98AU906
4) CMOS Inpud Pad Buffer with Active Pull-Up / Pin numbers 7, 24, 26
INPUT PIN
A Z
CAPACITANCE 3.5pF
A
D98AU907
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STA013 - STA013B - STA013T
5.4. TIMING DIAGRAMS 5.4.1. Audio DAC Interface a) OCLK in output. The audio PLL is used to clock the DAC
OCLK (OUTPUT)
SDO tsdo SCKT tsckt LRCLK tlrclk
D98AU969
tsdo = 3.5 + pad_timing (Cload_SDO) - pad_timing (Cload_ OCLK) tsckt = 4 + pad_timing (Cload_SCKT) - pad_timing (Cload_ OCLK) tlrckt = 3.5 + pad_timing (Cload_LRCCKT) pad_timing (Cload_ OCLK)
Pad-timing versus load
Load (pF) 25 50 75 100 Pad_timing 2.90ns 3.82ns 4.68ns 5.52ns
Cload_XXX is the load in pF on the XXX output. pad_timing (Cload_XXX) is the propagation delay added to the XXX pad due to the load.
b) OCLK in input.
OCLK (INPUT) thi tlo
SDO tsdo SCKT tsckt LRCLK tlrclk toclk
D98AU970
Thi min = 3ns Tlo min = 3ns Toclk min = 25ns tsdo = 5.5 + pad_timing (Cload_SDO) ns tsckt = 6 + pad_timing (Cload_SCKT) ns tlrckt = 5.5 + pad_timing (Cload_LRCKT) ns
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STA013 - STA013B - STA013T
5.4.2. Bitstream input interface (SDI, SCKR, BIT_EN) SCL_POL = 0
BIT_EN t_biten tsckr_min_period SCKR tsckr_min_low tsckr_min_high SCLK_POL=0 t_biten
SDI
IGNORED
VALID
IGNORED
tsdi_setup
tsdi_hold
D98AU971A
5.4.2. Bitstream input interface (SDI, SCKR, BIT_EN) SCL_POL = 1
BIT_EN t_biten tsckr_min_period SCKR tsckr_min_low tsckr_min_high SCLK_POL=4 t_biten
SDI
IGNORED
IGNORED
VALID
IGNORED
tsdi_setup
tsdi_hold
D99AU1038
tsdi_setup_min = 2ns tsdi_hold_min = 3ns tsckr_min_hi = 10ns tsckr_min_low = 10ns tsckr_min_lperiod = 50ns t_biten (min) = 2ns 5.4.3. SRC_INT This is an asynchronous input used in "broadcast' mode. SRC_INT is active low
SRC_INT t_src_hi t_src_low
D98AU972
t_src_low min duration is 50ns (1DSP clock period) t_src_high min duration is 50ns (1DSP clock period) 5.4.4. XTI,XTO and CLK_OUT timings
XTI (INPUT) thi tlo
XTO txto CLK_OUT tclk_out
D98AU973
txto = 1.40 + pad_timing (Cload_XTO) ns tclk_out = 4 + pad_timing (Cload_CLK_OUT) ns
Note: In "multimedia" mode, the CLK_OUT pad is DATA_REQ. In that case, no timing is given between the XTI input and this pad.
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STA013 - STA013B - STA013T
5.4.5. RESET The Reset min duration (t_reset_low_min) is 100ns
RESET
treset_low_min
D98AU974
5.5. CONFIGURATION FLOW
HW RESET
set
PCM-DIVIDER
PCM OUTPUT INTERFACE CONFIGURATION
set
PCM-CONF.
set { PLL FRAC_441_H, PLL FRAC_441_L, PLL FRAC_H, PLL FRAC_L }
PLL CONFIGURATION FOR: * { 48, 44.1, 32 29, 22.05, 16 12, 11.025, 8 } KHz * MULTIMEDIA MODE see {TAB 5 to TAB12}
set { MFS DF_441, MFSDF }
THE OVERALL SETTING STEPS ARE INCLUDED IN THE STA013 CONFIGURATION FILE AND CAN BE DOWNLOADED IN ONE STEP. STM PROVIDES A SPECIFIC CONFIGURATION FILE FOR EACH SUPPORTED INPUT CLOCK FREQUENCY
set
PLL CTRL
set
SCLK_POL
INPUT SERIAL CLOCK POLARITY CONFIGURATION
set
DATA_REQ_ENABLE
DATA REQUEST PIN ENABLE
set
REQ_POL
DATA REQUEST POLARITY CONFIGURATION
set
RUN
D98AU975
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STA013 - STA013B - STA013T
Table 5: PLL Configuration Sequence For 10MHz Input Clock 256 Oversapling Clock
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 18 3 15 16 169 49 42 60 161
Table 7: PLL Configuration Sequence For 14.31818MHz Input Clock 256 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 12 3 15 16 187 103 58 119 161
Table 6: PLL Configuration Sequence For 10MHz Input Clock 384 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 17 3 9 10 110 160 152 186 161
Table 8: PLL Configuration Sequence For 14.31818MHz Input Clock 384 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 11 3 6 7 3 157 211 157 161
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STA013 - STA013B - STA013T
Table 9: PLL Configuration Sequence For 14.31818MHz Input Clock 512 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 11 3 6 7 3 157 211 157 161
Table 11: PLL Configuration Sequence For 14.7456MHz Input Clock 384 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 10 3 8 9 64 124 0 0 161
Table 10: PLL Configuration Sequence For 14.7456MHz Input Clock 256 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 12 3 15 16 85 4 85 0 161
Table 12: PLL Configuration Sequence For 14.7456MHz Input Clock 512 Oversapling Rathio
REGISTER ADDRESS 6 11 97 80 101 82 100 81 5 NAME reserved reserved MFSDF (x) MFSDF-441 PLLFRAC-H PLLFRAC-441-H PLLFRAC-L PLLFRAC-441-L PLLCTRL VALUE 9 2 5 6 0 184 0 0 161
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STA013 - STA013B - STA013T
5.6. STA013 CONFIGURATION FILE FORMAT The STA013 Configuration File is an ASCII format. An example of the file format is the following: 58 1 42 4 128 15 ............ It is a sequence of rows and each one can be interpreted as an I2C command. The first part of the row is the I2C address (register) and the second one is the I2C data (value). To download the STA013 configuration file into the device, a sequence of write operation to STA013 I2C interface must be performed. The following program describes the I2C routine to be implemented for the configuration driver:
42
4
I C REGISTER VALUE I2C SUB-ADDRESS
2
D98AU976
STA013 Configuration Code (pseudo code)
download cfg - file { fopen (cfg_file); fp:=1; do { I2C_start_cond; I2C_write_dev_addr; I2C_write_subaddress (fp); I2C_write_data (fp); I2C_stop_cond; fp++; } while (!EDF) }
/*set file pointer to first row */
/* generate I2C start condition for STA013 device address */ /* write STA013 device address */ /* write subaddress */ /* write data */ /* generate I2C stop condition */ /* update pointer to new file row */ /* repeat until End of File /* End routine */ */
Note:1 STA013 is a device based on an integrated DSP core. Some of the I2C registers default values are loaded after an internal DSP boot operation. The bootstrap time is 60 micro second. Only after this time lenght, the data in the register can be considered stable. Note 2: Refer also to the application note 1090
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STA013 - STA013B - STA013T
DIM. MIN. A a1 b b1 C c1 D E e e3 F L S 7.4 0.4 17.7 10 0.1 0.35 0.23
mm TYP. MAX. 2.65 0.3 0.49 0.32 0.5 45 (typ.) 18.1 10.65 1.27 16.51 7.6 1.27 0.291 0.016 0.697 0.394 0.004 0.014 0.009 MIN.
inch TYP. MAX. 0.104 0.012 0.019 0.013 0.020
OUTLINE AND MECHANICAL DATA
0.713 0.419 0.050 0.65 0.299 0.050
SO28
8 (max.)
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STA013 - STA013B - STA013T
mm DIM. MIN. A A1 A2 B C D D1 D3 E E1 E3 e L L1 k 0.45 11.80 9.80 0.05 1.35 0.30 0.09 11.80 9.80 12.00 10.00 8.00 12.00 10.00 8.00 0.80 0.60 1.00 0.75 0.018 12.20 10.20 0.464 0.386 1.40 0.37 TYP. MAX. 1.60 0.15 1.45 0.45 0.20 12.20 10.20 0.002 0.053 0.012 0.004 0.464 0.386 MIN.
inch TYP. MAX. 0.063 0.006 0.055 0.015 0.057 0.018 0.008 0.472 0.394 0.315 0.472 0.394 0.315 0.031 0.024 0.039 0.030 0.480 0.401 0.480 0.401
OUTLINE AND MECHANICAL DATA
TQFP44 (10 x 10 x 1.4mm)
0(min.), 3.5(typ.), 7(max.)
D D1 A A2 A1
33 34 23 22
0.10mm .004 Seating Plane
E1
B
44 1 11
12
E
B
C
e
L
K
TQFP4410
0076922 D
36/38
STA013 - STA013B - STA013T
mm DIM. MIN. A A1 A2 b D D1 e E E1 f 0.350 0.400 1.100 0.500 8.000 5.600 0.800 8.000 5.600 1.200 TYP. MAX. 1.700 0.450 0.014 MIN.
inch TYP. MAX. 0.067 0.016 0.043 0.20 0.315 0.220 0.031 0.315 0.220 0.018
OUTLINE AND MECHANICAL DATA
Body: 8 x 8 x 1.7mm
LFBGA64
0.047
BALL 1 IDENTIFICATION A D1 8 A B C D E F G H b (64 PLACES) e A2 E1 7 6 5 4 3 2 1 f f
0.15
A1
D
E
LFBGA64M
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STA013 - STA013B - STA013T
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com
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