7314 データシートの表示（PDF） - STMicroelectronics
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7314 Datasheet PDF : 12 Pages
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TDA7314
Figure 15: Typical Tone Response (with the ext.
components indicated in the test
circuit)
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (S)
A chip address byte, containing the TDA7314
address (the 8th bit of the byte must be 0). The
TDA7314 must always acknowledge at the end
of each transmitted byte.
A sequence of data (N-bytes + acknowledge)
A stop condition (P)
TDA7314 ADDRESS
MSB first byte
LSB MSB
S 1 0 0 0 1 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
1
0
0
0
1
0
MSB
0
0
LSB
DATA BYTES
MSB
0
0
B2
B1
B0
A2
A1
1
1
0
B1
B0
A2
A1
1
1
1
B1
B0
A2
A1
1
0
0
B1
B0
A2
A1
1
0
1
B1
B0
A2
A1
0
1
0
G1
G0
S2
S1
0
1
1
0
C3
C2
C1
0
1
1
1
C3
C2
C1
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Gx = 6.25dB steps
LSB
FUNCTION
A0
Volume control
A0
Speaker ATT LR
A0
Speaker ATT RR
A0
Speaker ATT LF
A0
Speaker ATT RF
S0
Audio switch
C0
Bass control
C0
Treble control
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