TDA7443D Datasheet, PDF (7/15 Pages) STMicroelectronics – TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR WITH AGC

TDA7443D
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
s A start condition (S)
s A chip address byte, containing the TDA7440D address
s A subaddress bytes
s A sequence of data (N byte + acknowledge)
s A stop condition (P)
CHIP ADDRESS
SUBADDRESS
DATA 1 to DATA n
MSB
LSB
MSB
S 1 0 0 0 1 0 0 0 ACK X X X B
LSB
MSB
DATA
ACK
D96AU420
ACK = Acknowledge; S = Start;
P = Stop;
A = Address;
DATA
LSB
ACK P
B = Auto Increment
EXAMPLES
No Incremental Bus
The TDA7443D receives a start condition, the correct chip address, a subaddress with the B = 0 (no incremental
bus), N-data (all these data concern the subaddress selected), a stop condition.
CHIP ADDRESS
SUBADDRESS
MSB
LSB
MSB
LSB
MSB
S 1 0 0 0 1 0 0 0 ACK X X X 0 D3 D2 D1 D0 ACK
D96AU421
DATA
DATA
LSB
ACK P
Incremental Bus
The TDA7443D receivea start conditions, the correct chip address, a subaddress with the B = 1 (incremental
bus): now it is in a loop condition with an autoincrease of the subaddress whereas SUBADDRESS from
"XXX1000" to "XXX1111" of DATA are ignored.The DATA 1 concern the subaddress sent, and the DATA 2 con-
cern the subaddress sent plus one in the loop etc, and at the end it receivers the stop condition.
CHIP ADDRESS
SUBADDRESS
DATA 1 to DATA n
MSB
LSB
MSB
LSB
MSB
S 1 0 0 0 1 0 0 0 ACK X X X 1 D3 D2 D1 D0 ACK
D96AU422
DATA
LSB
ACK P
7/15