TDA7402 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7402' PDF : 69 Pages View PDF
TDA7402
8
I2C bus interface
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)
bsolete Product(s) 8.2
Obsolete Product(s) - O 8.3
CHIP ADDRESS
SUBADDRESS
DATA 1....DATA n
MSB
LSB
MSB
LSB
MSB
S 1 0 0 0 1 1 0 R/W ACK C AZ I A A A A A ACK
S = Start
R/W = "0" -> Receive-Mode (Chip could be programmed by µP)
"1" -> Transmission-Mode (Data could be received by µP)
ACK = Acknowledge
P = Stop
Max clock speed 500kbits/s
DATA
LSB
ACK P
Auto increment
If bit I in the subaddress byte is set to "1", the auto increment of the subaddress is enabled.
Transmitted data (send mode)
Table 10. Transmitted data (send mode)
MSB
X
X
X
X
X
SM = Soft mute activated
ST = Stereo
P = Pause
X = Not Used
LSB
P
ST
SM
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:
Table 11. Reset condition
MSB
LSB
1
1
1
1
1
1
1
0
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).
47/69
Share Link: 
