TDA7312 STMicroelectronics, TDA7312 Datasheet - Page 9

• Manufacturer Part Number: TDA7312
• Description: Audio DSPs Digital Audio Proc
• Manufacturer: STMicroelectronics

Specifications of TDA7312

• Operating Temperature Range: - 25 C to + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-30
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
SOFTWARE SPECIFICATION
Chip address
DATA BYTES
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Sx = Input Selector; D
ACK = Acknowledge
S = Start
P = Stop
S
MSB
1
A start condition (s)
A chip address byte, containing the TDA7312
MSB
1
0
1
1
0
0
0
MSB
0
0
TDA7312 ADDRESS
0
first byte
0
0
0
0
1
1
1
0
1 ADDR
0
2
B2
0
1
0
1
1
ADDR
1
1
ADDR
2
0
D2
LSB
B1
B1
B1
0
1
ACK
ADDR
1
MSB
B0
B0
B0
D1
C3
C3
LSB
0
DATA
Data Transferred (N-bytes + Acknowledge)
C2
C2
A2
A2
A2
S2
ADDR2 ADDR1
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)
0
0
1
1
C1
C1
A1
A1
A1
S1
LSB
X
0
1
0
1
ACK
= Dig Out Pins
MSB
88 HEX
8A HEX
8C HEX
8E HEX
LSB
A0
A0
A0
S0
C0
C0
CHIP ADDRESS
DATA
Volume control
Speaker ATT L
Speaker ATT R
Audio switch
Bass control
Treble control
FUNCTION
TDA7312
LSB
AC K
9/13
P