Silan

Semiconductors

SC84510

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

5

PIN DESCRIPTION

Pin Name

I/O

Description

OPT

I/O

INPUT: 200k

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.

High duty is about 60

µs.

OSC OUT

O

OSCR

I

RC mode oscillation with 50k

Ω resistor.

CLK

I/O

Connect to 8042 auxiliary port CLK line.

DATA

I/O

Connect to 8042 auxiliary port DATA line.

R

M

L

I

Three key-switches inputs.

200k

Ω resistor pull low.

X1

X2

Y1

Y2

I

Three step dynamic input impedance.

Use current comparator to measure photo-couples “ON”, or “OFF”.

Z1

Z2

I

Z-axis input.

Photo mode: Three steps dynamic input impedance. Current comparator input.

Key mode: 200k

Ω resistor pull low. 7 levels increased by “M” key.

Voltage mode: 200k

Ω resistor pull low. 7 levels voltage comparator.

Mechanical mode: 13.2k

Ω resistor pull low.

Negative power.

Power line.