TDA7315 Datasheet, PDF (7/12 Pages) STMicroelectronics – DIGITAL CONTROLLED AUDIO PROCESSOR

Figure 15: Typical Tone Response (with the ext.
components indicated in the test
circuit)
TDA7315
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (S)
A chip address byte, containing the TDA7315
address (the 8th bit of the byte must be 0). The
TDA7315 must always acknowledge at the end
of each transmitted byte.
A sequence of data (N-bytes + acknowledge)
A stop condition (P)
TDA7315 ADDRESS
MSB first byte
LSB MSB
S 1 0 0 0 0 0 0 0 ACK
ACK = Acknowledge
S = Start
P = Stop
MAX CLOCK SPEED 100kbits/s
DATA
LSB MSB
ACK
DATA
Data Transferred (N-bytes + Acknowledge)
LSB
ACK P
SOFTWARE SPECIFICATION
Chip address = 80 Hex
1
0
0
0
0
0
MSB
0
0
LSB
DATA BYTES
MSB
0
0
1
0
1
0
0
1
0
1
0
1
B2
B1
B0
A2
A1
0
B1
B0
A2
A1
1
B1
B0
A2
A1
0
X
X
L
X
1
0
C3
C2
C1
1
1
C3
C2
C1
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; X = don‘t care.
LSB
FUNCTION
A0
Volume control
A0
Speaker ATT L
A0
Speaker ATT R
X
Loudness
C0
Bass control
C0
Treble control
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