參數(shù)資料
型號: TDA7449D
廠商: STMICROELECTRONICS
元件分類: 音頻控制
英文描述: 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20
封裝: SO-20
文件頁數(shù): 19/19頁
文件大?。?/td> 198K
代理商: TDA7449D
9/19
TDA7449
Figure 14. Acknowledge on the I2CBUS
5
SOFTWARE SPECIFICATION
5.1 Interface Protocol
The interface protocol comprises:
A start condition (S)
A chip address byte, containing the TDA7449 address
A subaddress bytes
A sequence of data (N byte + acknowledge)
A stop condition (P)
Figure 15.
ACK = Acknowledge
S = Start
P = Stop
A = Address
B = Auto Increment
6
EXAMPLES
6.1 No Incremental Bus
The TDA7449 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 16.
SCL
1
MSB
23789
SDA
START
ACKNOWLEDGMENT
FROM RECEIVER
D99AU1033
S
1
0
1
0
ACK
DATA
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU420
X
DATA
SUBADDRESS
DATA 1 to DATA n
X
B
S
1
0
1
0
ACK
DATA
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU421
X
D3
SUBADDRESS
DATA
X
0
D2 D1 D0
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