sc84512 Silan, sc84512 Datasheet - Page 5

• Manufacturer Part Number: sc84512
• Description: Ps/2 3d Scrolling Mouse Controller
• Manufacturer: Silan

PIN DESCRIPTIONS
FUNCTION DESCRIPTIONS
1. LEGACY PS/2 MOUSE OPERATING
(A) Operating mode
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
There are four operating modes in PS/2 mouse:
(a) Reset Mode:
Pin No
In this mode a self-test is initiated during power-on or by a Reset command. After reset signal, PS/2 mouse
will send:
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
a Completion code AA & ID code 00.
b Set default:
* Sampling rate: 100 reports/s
* Non-autospeed
* Stream mode
* 2 dot/count
* Disable
Pin Name
OSC OUT
OSCR
DATA
OPT
CLK
VSS
V
Z1
Z2
X1
X2
Y1
Y2
M
R
DD
L
Power line.
RC mode oscillation with 50k resistor.
Z-axis input.
Photo mode: Three steps dynamic input impedance. Current comparator input.
Key mode: 200k resistor pull low. 7 levels increased by “ M” key.
Voltage mode: 200k resistor pull low. 7 levels voltage comparator.
Mechanical mode: 13.2k resistor pull low.
Connect to 8042 auxiliary port CLK line.
Connect to 8042 auxiliary port DATA line.
INPUT: 200k pull low to VSS.
When OPT is connected to VDD, SC84512 will enter test mode. In test mode, L
will be the output of X1, while M will be the output of X2. Toggling R key can
change these output to be Y1, Y2 or Z1, Z2 respectively.
OUTPUT: 2kHz Z-axis LED-driving source.
“ 1” = VDD, “ 0” = floating; High duty is about 60 s.
Negative power.
Three key-switches inputs.
200k resistors pull low.
Three step dynamic input impedance.
Use current comparator to measure photo-couples “ ON” , or “ OFF” .
RC mode oscillation with 50k resistor.
Description
REV: 1.0
SC84512
Page 5 of 12
2005.04.22