UU9792

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 15

www.unisonic.com.tw

QW-R125-047.a

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FUNCTION DESCRIPTIONS

Command/Data transfer method

This device is controlled by 2wire serial signal(SDA,SCL)。

It has to generate the condition such as Start condition and Stop condition in 2wire serial interface transfer method.

Method of how to transfer command and data is shown as follows.

1. Generate “start condition”

2. Issue Slave address

3. Transfer command and display data

Acknowledge

Data format is 8bits and return Acknowledge after transfer 8bits data.

When SCL 8

When SCL 9

(As Output format is NMOS-Open-Drain, can’t output ‘H’ level.)

If no need Acknowledge function, Please input ‘L’ level from SCL 8th= ‘L’ to SCL 9th= ‘L’