Silan

Semiconductors

SC84520

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

13

3.MICROSOFT OPS/2 SCROLLING MOUSE MODE:

A) Entering procedure: Except in WRAP mode, While SC84520 received the following consecutive

command.

a. F3 C8

---- set sampling rate 200/sec

b. F3 64

---- set sampling rate 100/sec

c. F3 50

---- set sampling rate 80/sec

B) Operating:

a. All of the command in legacy mode still be valid.

b. The ID code of read device type command (F2) will changed from “00” to be “03”.

c. Data report will be four bytes format:

Byte

Bit

Description

1

0

Left button status; 1 = pressed

1

Right button status; 1 = pressed

2

Middle button status; 1 = pressed

3

Reserve

4

X data sign; 1 = negative

5

Y data sign; 1 = negative

6

X data overflow; 1 = overflow

7

Y data overflow; 1 = overflow

2

0 - 7

X data (D0 – D7)

3

0 - 7

Y data (D0 – D7)

4

0 - 7

Z data (D0 – D7)

C) Exiting Microsoft scrolling mode:

Thereare twoways toexit:

a. Power off.

b. Reset command (FF).