EM83807

ALL-IN-ONE PLUG & PLAY 3-BUTTON SERIAL MOUSE CONTROLLER

2

* This specification is subject to be changed without notice.

9.3.1999

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

FUNCTIONAL BLOCK DIAGRAM

PIN DESCRIPTIONS

OPT

I/O

INPUT: 200k

Ω pull low to VSS.

When OPT is connected to VDD, EM84530 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 respectively.

OSC.OUT

O

The RC oscillation clock output. Or 3mA sink current output for X, Y photo

emitters.

OSCR

I

Connect 50k

Ω±1% precise resistor for oscillation.

RTS

I/O

±12V signal with 10mA driving. Used as PnP ID code output trigger signal from

100w (-12V) to high (+12V) while under normal operating. RTS will keep on

±12V driving.

RXD

I/O

One report contains 4 data bytes, 7 data bits without parity in the data byte. The data

byte is sgifted out from LSB through MSB, started by start bit and ended by stop

bit. The RXD signal swing between +6V and -6V.

R

I

Three key-switches inputs. 200k

Ω resistor pull low.

M

I/O

L

I/O

X1

I

Three step dynamic input impedance. If OSC.OUT is not connected to LEDs, the

X2

I

dynamic input impedance will be off.

Y1

I

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

Y2

I

VSS

Negative power.

VDD

Power line.

Symbol

I/O

Function

OPT

X1

X2

Y1

Y2

L

M

R

OSCR

OSC.OUT

C

O

M

P

A

R

A

T

O

R

M

O

T

I

O

N

D

E

T

E

C

T

O

R

D

E

B

O

U

N

C

E

COUNTER

COMMAND

& STATUS

OR PNP IO

SYSTEM CLOCK

GENERATOR

RC

OSCILLATION

MULTIPLEXER

DATA

I/O

TIMING

CONTROLLER

RXD

RTS