TDA7442 STMicroelectronics, TDA7442 Datasheet - Page 7

• Manufacturer Part Number: TDA7442
• Description: IC PROCESSOR TONE/SURRND 32-SDIP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7442

• Applications: TV, HI-FI Systems
• Mounting Type: Through Hole
• Package / Case: 32-SDIP (0.400", 10.16mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8867-5; TDA7442

4
Interface Protocol
The interface protocol comprises:
ACK = Acknowledge
S = Start
P = Stop
A = Address
B = Auto Increment
4.1 EXAMPLES
4.1.1 No Incremental Bus
The TDA7442D receives a start condition, the correct chip address, a subaddress with the MSB = 0 (no
incremental bus), N-datas (all these data concern the subaddress selected), a stop condition.
4.1.2 Incremental Bus
The TDA7442D receive a start conditions, the correct chip address, a subaddress with the MSB = 1 (in-
cremental bus): now it is in a loop condition with an autoincrease of the subaddress whereas SUBAD-
DRESS from "1XXX1010" to "1XXX1111" of DATA are ignored.
The DATA 1 concern the subaddress sent, and the DATA 2 concerns the subaddress sent plus one sent
in the loop etc, and at the end it receivers the stop condition.
S
S
S
A start condition (S)
A chip address byte, containing the TDA7442D
A subaddress bytes
A sequence of data (N byte + acknowledge)
A stop condition (P)
MSB
MSB
MSB
SOFTWARE SPECIFICATION
1
1
1
0
0
0
D95AU226A
CHIP ADDRESS
CHIP ADDRESS
D95AU306
CHIP ADDRESS
D95AU307
0
0
0
0
0
0
0
0
0
0
0
0
A
A
A
LSB
LSB
LSB
0
0
0
ACK
ACK
ACK
MSB
MSB
MSB
B
0
1
X
X
SUBADDRESS
SUBADDRESS
SUBADDRESS
X
X
DATA
X
X
D3
D3
D2 D1 D0
D2 D1 D0
LSB
LSB
LSB
ACK
ACK
ACK
MSB
MSB
MSB
DATA 1 to DATA n
DATA 1 to DATA n
TDA7442 - TDA7442D
DATA
DATA
DATA
DATA
LSB
LSB
LSB
ACK
ACK
ACK
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P
P
P