tda7314 STMicroelectronics, tda7314 Datasheet - Page 8

• Manufacturer Part Number: tda7314
• Description: Digital Controlled Audio Processor With Loudness
• Manufacturer: STMicroelectronics

TDA7314
Figure 15: Typical Tone Response (with the ext.
MAX CLOCK SPEED 100kbits/s
SOFTWARE SPECIFICATION
Chip address
DATA BYTES
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Gx = 6.25dB steps
8/12
ACK = Acknowledge
S = Start
P = Stop
S
MSB
1
MSB
0
1
1
1
1
0
0
0
1
MSB
0
TDA7314 ADDRESS
0
0
components indicated in the test
circuit)
first byte
0
1
1
0
0
1
1
1
0
0
1
0
0
B2
0
1
0
1
0
1
1
0
1
0
LSB
ACK
0
G1
B1
B1
B1
B1
B1
0
1
MSB
0
G0
B0
B0
B0
B0
B0
C3
C3
LSB
0
DATA
Data Transferred (N-bytes + Acknowledge)
C2
C2
A2
A2
A2
A2
A2
S2
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)
LSB
C1
C1
A1
A1
A1
A1
A1
S1
ACK
MSB
LSB
A0
A0
A0
A0
A0
S0
C0
C0
DATA
Volume control
Speaker ATT LR
Speaker ATT RR
Speaker ATT LF
Speaker ATT RF
Audio switch
Bass control
Treble control
FUNCTION
LSB
ACK
P