TDA7449L_04 STMICROELECTRONICS [STMicroelectronics], TDA7449L_04 Datasheet - Page 7

• Manufacturer Part Number: TDA7449L_04
• Description: LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 10. Acknowledge on the I
5
5.1 Interface Protocol
The interface protocol comprises:
Figure 11.
ACK = Acknowledge
S = Start
P = Stop
A = Address
B = Auto Increment
6
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.
S
S
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)
MSB
MSB
SOFTWARE SPECIFICATION
EXAMPLES
1
1
0
0
CHIP ADDRESS
CHIP ADDRESS
D96AU420
D96AU421
0
0
0
0
SCL
SDA
1
1
START
0
0
0
0
LSB
LSB
0
0
ACK
ACK
MSB
1
2
CBUS
MSB
MSB
X
X
X
X
2
SUBADDRESS
SUBADDRESS
X
X
D99AU1033
B
0
D3
3
D2 D1 D0
DATA
LSB
LSB
7
ACK
ACK
MSB
MSB
8
ACKNOWLEDGMENT
FROM RECEIVER
DATA 1 to DATA n
DATA
DATA
DATA
9
LSB
LSB
TDA7449L
ACK
ACK
7/14
P
P