參數(shù)資料
型號: TDA7402
廠商: STMICROELECTRONICS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP44
封裝: 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44
文件頁數(shù): 42/69頁
文件大?。?/td> 865K
代理商: TDA7402
TDA7402
I2C bus interface
8
I2C bus interface
8.1
Interface protocol
The interface protocol comprises:
a start condition (S)
a chip address byte (the LSB bit determines read / write transmission)
a subaddress byte
a sequence of data (N-bytes + acknowledge)
a stop condition (P)
S = Start
R/W = "0" -> Receive-Mode (Chip could be programmed by P)
"1" -> Transmission-Mode (Data could be received by P)
ACK = Acknowledge
P = Stop
Max clock speed 500kbits/s
8.2
Auto increment
If bit I in the subaddress byte is set to "1", the auto increment of the subaddress is enabled.
8.3
Transmitted data (send mode)
SM = Soft mute activated
ST = Stereo
P = Pause
X = Not Used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chipaddress.
A Power-On-Reset is invoked if the Supply voltage is below than 3.5V. After that the
following data is written automatically into the registers of all subaddresses:
The programming after POR is marked bold-face / underlined in the programming tables.
With this programming all the outputs are muted to VREF (VOUT= VDD/2).
CHIP ADDRESS
SUBADDRESS
DATA 1....DATA n
MSB
LSB
MSB
LSB
MSB
LSB
S
1
0001
10
R/W
ACK
C
AZ
I
AAA
AA
ACK
DATA
ACK
P
Table 10.
Transmitted data (send mode)
MSB
LSB
XX
XP
ST
SM
Table 11.
Reset condition
MSB
LSB
1
110
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