TDA7411 ST Microelectronics, TDA7411 Datasheet - Page 30

• Manufacturer Part Number: TDA7411
• Description: ADVANCED CAR SIGNAL PROCESSOR
• Manufacturer: ST Microelectronics

TDA7411
I
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
ACK = Acknowledge
AZ = AutoZero-Remain
T = Testing
I = Autoincrement
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)
SM = Soft mute activated
ST = Stereo
X = Not Used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chip address.
Reset Condition
A power on reset is invoked if the supply voltage is below than 3.5V. After that the following data are written
automatically into the registers of all sub addresses:
The programming after POR is marked bold face / underlined in the programming tables. With that pro-
gramming all the outputs are muted to Vr
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C BUS INTERFACE DESCRIPTION
S
MSB
MSB
MSB
1
X
1
0
D03AU1526
CHIP ADDRESS
0
0
1
X
1
1
0 R/W ACK
LSB
X
1
MSB
A4
AZ T
ef
.
SUBADDRESS
X
1
I
A3 A2 A1 A0
ST
1
LSB
ACK
MSB
SM
1
DATA 1 to DATA n
DATA
X
1
LSB
ACK
LSB
LSB
X
0
P