TDA7402_00 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7402_00

CAR RADIO SIGNAL PROCESSOR

STMicroelectronics 

TDA7402

9.0 I C BUS INTERFACE

9.1 Interface Protocol

s The interface protocol comprises:

s a start condition (S)

s a chip address byte (the LSB bit determines read / write transmission)

s a subaddress byte

s a sequence of data (N-bytes + acknowledge)

s a stop condition (P)

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

9.2 Auto increment

If bit I in the subaddress byte is set to ”1”, the autoincrement of the subaddress is enabled.

9.3 TRANSMITTED DATA (send mode)

MSB

LSB

X X X X X P ST SM

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.

9.4 Reset Condition

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 :

MSB

LSB

1 1111 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).

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