TDA7449L_04 Datasheet, PDF (7/14 Pages) STMicroelectronics – LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7449L
Figure 10. Acknowledge on the I²CBUS
SCL
1
2
3
7
8
9
SDA
START
MSB
D99AU1033
ACKNOWLEDGMENT
FROM RECEIVER
5 SOFTWARE SPECIFICATION
5.1 Interface Protocol
The interface protocol comprises:
■ A start condition (S)
■ A chip address byte, containing the TDA7449L address
■ A subaddress bytes
■ A sequence of data (N byte + acknowledge)
■ A stop condition (P)
Figure 11.
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
D96AU420
ACK = Acknowledge
S = Start
P = Stop
A = Address
B = Auto Increment
LSB
MSB
DATA
ACK
DATA
LSB
ACK P
6 EXAMPLES
6.1 No Incremental Bus
The TDA7449L receives a start condition, the correct chip address, a subaddress with the B = 0 (no incre-
mental bus), N-data (all these data concern the subaddress selected), a stop condition.
Figure 12.
CHIP ADDRESS
SUBADDRESS
DATA
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
LSB
ACK P
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