TDA7409D View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7409D

CARRADIO-SIGNAL-PROCESSOR

STMicroelectronics 

TDA7409

2.0 I2C BUS INTERFACE

2.1 Interface Protocol

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)

s the max. CLOCK SPEED is 500kbits/s

CHIP ADDRESS

SUBADDRESS

DATA 1 to DATA n

MSB

LSB

MSB

LSB

MSB

LSB

S 1 0 0 0 1 0 0 R/W ACK I3 I2 I1 I0 A3 A2 A1 A0 ACK

ACK

ACK P

D99AU1044

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

2.2 TRANSMITTED DATA (send mode)

MSB

LSB

X

X

X

X

X

X

X

SM

SM = Soft mute activated

X = Not Used

The transmitted data is automatic updated after each ACK. Transmission can be repeated without new chipaddress.

2.3 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

1

1

1

1

1

LSB

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).

Note : All the blank bits in the following tables are "don't care"-bits.

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