Silan
Semiconductors
SC84520
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
1
2
3
4
Bit
0
1
2
3
4
5
6
7
0-7
0-7
0-7
Description
Left button status; 1 = pressed
Right button status; 1 = pressed
Middle button status; 1 = pressed
Reserve
X data sign; 1 = negative
Y data sign; 1 = negative
X data overflow; 1 = overflow
Y data overflow; 1 = overflow
X data (D0 – D7)
Y data (D0 – D7)
Z data (D0 – D7)
C) Exiting Microsoft scrolling mode:
There are two ways to exit:
a. Power off.
b. Reset command (FF).
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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