TP8452 Ver la hoja de datos (PDF) - Topro

Número de pieza

componentes Descripción

Fabricante

TP8452

PS/2 2D 3Key Mouse Controller

Topro 

TP8452

PS/2 2D 3Key Mouse

Controller

Pin Descriptions

Pin Name I/O

Function

1 18

24

35

46

57

69

7 10

8 11

9 12

10 13

11 14

12 15

13 16

14 17

VDD I Power.

Test

If it is connected to VDD or floated,TP8452 will work on normal operation.

While it is connect to GND, TP8452 will enter testing mode, you can use OSCR

to select two types of testing mode.

OSC.OUT O Clock output

CLK

I/O 8042 auxiliary port CLK line

DATA I/O 8042 auxiliary port DATA line

VSS

Ground.

R

I Three key-switches exert seven different combinations totally.

M

I/O Both key-pressed and key-released signals accompanied with

L

I/O horizontal and vertical state will be sent to the host. The status

of the key-switches will be preserved when RXD is transmitting.

The debounce interval for both key-press and key-release is 12

ms.

In testing mode, L and M are the outputs of motion detector.

Use R key can select the two outputs from X1, X2 or Y1, Y2.

This feature can help manufacture to adjust the phase of four

photo-couples for improving the yield.

X1

I Four photo-couple signals denote UP, DOWN,LEFT, and RIGHT

X2

state During the scanning period, as long as the photo-couples

Y1

change their states, the value of vertical or horizontal counter

Y2

will accordingly increase or decrease.

OSCR I If it is connected a 30kohm resistor to ground, TP8452 will employ

a built in RC ckt to generate clock. While it is connected to VDD,and Test

connect to GND, it will enter testing mode, you can observe X/Y input on L/M

pin.

Page 6 of 20

TOPRO CONFIDNETIAL

2003/7/31 Print

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