MX8650

Wireless Optical Mouse Sensor

Tel:86-755-36800780 82507171 Fax:86-755-8835 3509

Website:http://www.lizhiic.com

Shenzhen LIZE Electronic Technology Co., Ltd

Date: 22.Jan.2015

Version: 1.0

Page: 17 of 24

Chart 5 3D Assembly

8. Serial interface

The synchronous serial port is used to set and read parameters in the mouse sensor.

SCLK: The serial clock line, It is always generated by the mouse controller.

SDIO:

The serial data line is used to write and read data.

8.1Transmission Protocol

The transmission protocol is a two-wire link, half duplex protocol between the micro-controller and

the mouse sensor. All data changes on SDIO are initiated by the falling edge on SCLK. The mouse

controller always initiates communication; the mouse sensor never initiates data transfers.

The transmission protocol consists of the two operation modes:

- Write Operation.

- Read Operation.

Both of the two operation modes consist of two bytes. The first byte contains the address (seven

bits) and has a bit 7 as its MSB to indicate data direction. The second byte contains the data.