TDA7402_07 STMICROELECTRONICS [STMicroelectronics], TDA7402_07 Datasheet - Page 49

• Manufacturer Part Number: TDA7402_07
• Description: Car radio signal processor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

TDA7402
9
9.1
9.2
9.3
I
Interface protocol
●
●
●
●
●
●
S = Start
R/W = "0" -> Receive-Mode (Chip could be programmed by µP)
ACK = Acknowledge
P = Stop
Max clock speed 500kbits/s
Auto increment
If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled.
Transmitted data (send mode)
Table 10.
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 :
Table 11.
The programming after POR is marked bold-face / underlined in the programming tables.
With this programming all the outputs are muted to V
S
2
C bus interface
MSB
1
MSB
MSB
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)
X
"1" -> Transmission-Mode (Data could be received by µP)
1
0
CHIP ADDRESS
0
0
Transmitted data (send mode)
Reset condition
1
X
1
1
0
LSB
R/W
X
ACK C
1
MSB
AZ
SUBADDRESS
X
1
I
A
A
A
1
X
A
LSB
REF
A
ACK
(V
OUT
MSB
P
1
= V
DATA 1....DATA n
DD
/2).
DATA
ST
I
1
2
C bus interface
LSB
LSB
LSB
SM
ACK
0
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P