TDA7312 Datasheet, PDF (9/13 Pages) STMicroelectronics – DIGITAL CONTROLLED STEREO AUDIO PROCESSOR

SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte, containing the TDA7312
TDA7312
address (the 8th bit of the byte must be 0). The
TDA7312 must always acknowledge at the end
of each transmitted byte.
A sequence of data (N-bytes + acknowledge)
A stop condition (P)
TDA7312 ADDRESS
MSB first byte
LSB MSB
S 1 0 0 0 1 ADDR ADDR 0 ACK
2
1
DATA
LSB MSB
ACK
DATA
LSB
ACK P
ACK = Acknowledge
S = Start
P = Stop
Data Transferred (N-bytes + Acknowledge)
SOFTWARE SPECIFICATION
Chip address
1
0
0
0
1 ADDR ADDR 0
MSB
2
1 LSB
DATA BYTES
ADDR2 ADDR1
0
0
0
1
1
0
1
1
CHIP ADDRESS
88 HEX
8A HEX
8C HEX
8E HEX
MSB
0
0
1
0
1
0
0
1
0
1
0
1
LSB
FUNCTION
B2
B1
B0
A2
A1
A0
Volume control
0
B1
B0
A2
A1
A0
Speaker ATT L
1
B1
B0
A2
A1
A0
Speaker ATT R
0
D2
D1
S2
S1
S0
Audio switch
1
0
C3
C2
C1
C0
Bass control
1
1
C3
C2
C1
C0
Treble control
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Sx = Input Selector; D_X = Dig Out Pins
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