VD6283TX datasheet(10/59 Pages) STMICROELECTRONICS

10 / 59 page

Figure 10. Data format (read)

Ac P

Am P

0x40 (write)

ADDRESS[7:0]

0x41 (read)

INDEX[7:0]

DATA[7:0]

At the end of each byte, in both read and write message sequences, an acknowledge is issued by the receiving

device (that is, the VD6283 for a write and the host for a read).

A message can only be terminated by the bus master, either by issuing a stop condition or by a negative

acknowledge (that is, not pulling the SDA line low) after reading a complete byte during a read operation.

The interface also supports auto-increment indexing. After the first data byte has been transferred, the index is

automatically incremented by 1. The master can therefore send data bytes continuously to the slave until the

slave fails to provide an acknowledge or the master terminates the write communication with a stop condition. If

the auto-increment feature is employed, the master does not have to send address indexes between each data

byte.

Figure 11. Data format (sequential write)

0x40 (write)

ADDRESS[7:0]

INDEX[7:0]

DATA[7:0]

Figure 12. Data format (sequential read)

Ac P

0x40 (write)

ADDRESS[7:0]

INDEX[7:0]

DATA[7:0]

0x41 (read)

VD6283TX

I2C interface

DS13735 - Rev 1

page 10/59

VD6283TX Datasheet(PDF) 10 Page - STMicroelectronics