SC5358

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.1

2004.08.03

Http: www.silan.com.cn

Page 4 of 9

FUNCTION DESCRIPTION

SC5358 is connected to I

Date validity

A data on the SDA line must be stable when the SCL line is high state. It can be changed only when the SCL

line is low state. Please refer to the figure below.

Start and stop conditions

A start condition is activated when the SCL is high state and the SDA shifts from high to low state. A stop

condition is activated when the SCL is high state and the SDA shifts from low to high state. Please refer to the

figure below.

SDA

SCL

start condition

stop condition

Start and stop conditions are generated by MCU. The buses are busy after a start condition is activated and are

idle after a while when a stop condition is activated.

Byte format

Every byte transmitted to the SDA line consists of 8 bits. Each byte must be followed by an acknowledge bit.

The MSB is transmitted first.

During the 9th clock pulse, MCU puts a resistive high level on the SDA line and waits for acknowledge signal.

As a peripheral SC5358 must pull down the SDA line if acknowledging, or else keeps high state. Please refer to

the figure below.