TDA7439 datasheet(12/23 Pages) STMICROELECTRONICS

Part #	TDA7439

Description	Three-band digitally-controlled audio processor

PDF	23 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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12 / 23 page

I2C bus interface

TDA7439

12/23

Figure 12.

Timing diagram of the data on the I2C bus

Figure 13.

Timing diagram of the start/stop

Figure 14.

Timing diagram of the acknowledge

4.6

Interface protocol

The interface protocol comprises:

a start condition (S)

a chip-address byte, containing the TDA7439 address

a sub-address byte including an auto address-increment bit

a sequence of data bytes (N bytes + acknowledge)

a stop condition (P).

Figure 15.

SDA addressing and data

SCL

SDA

Data can change

Data stable

when clock high when clock low

SCL

SDA

Stop

Start

SCL

SDA

Acknowledge

Start

MSB

from receiver

ACK

DATA

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D96AU420

DATA

SUBADDRESS

DATA 1 to DATA n

S = Start, ACK = Acknowledge, B = Auto increment, P = Stop

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