TDA7417 datasheet(23/34 Pages) STMICROELECTRONICS

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TDA7417

I2C Bus specification

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I2C Bus specification

5.1

Interface Protocol

The interface protocol comprises:

●

a start condition (S)

●

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

●

a subaddress byte

●

a sequence of data (N-bytes + acknowledge)

●

a stop condition (P)

●

the max. clock speed is 500kbits/s

●

3.3V logic compatible

5.1.1

Receive Mode

S = Start

R/W = "0" -> Receive Mode (Chip can be programmed by P)

"1" -> Transmission Mode (Data could be received by P)

ACK = Acknowledge

P = Stop

TS = Testing mode

AZ = Auto zero remain

AI = Auto increment

5.1.2

Transmission Mode

SM = Soft mute activated for main channel

X = Not Used

The transmitted data is automatic updated after each ACK. Transmission can be repeated

without new chip address.

5.1.3

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:

R/W

ACK

DATA

ACK

R/W

ACK

XXX

ACK

Table 6.

Registers of all subaddresses

MSB

LSB

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