UT84520 Просмотр технического описания (PDF) - Unisonic Technologies

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UT84520

PS/2 SCROLLING MOUSE CONTROLLER

Unisonic Technologies 

UTC UT84520

Pin Assignment

VDD 1

OSC.OUT 2

Z1 3

Z2 4

CLK 5

DATA 6

OPT 7

VSS 8

16 OSCR

15 Y2

14 Y1

13 X2

12 X1

11

L

10

M

9

R

CMOS IC

Pin Descriptions

Pin No

1

2

3

4

5

6

Symbol

Vdd

OSC.OUT

Z1

Z2

CLK

DATA

7

OPT

I/O Function

P Power line

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

I Z-axis input.

I Photo mode: three steps dynamic input impedance.

I/O Connect to 8042 auxiliary port CLK line in PS/2 mode.

I/O Connect to 8042 auxiliary port DATA line in PS/2 mode.

Input: 200Kohm pull low to Vss.

When Opt is connected to Vdd, UT84520 will enter test mode. In test mode, L will

I

be the output of X1, while M will be the output of X1. Toggling R key can change

these output to be Y1, Y2 or Z1, Z2 respectively.

8

Vss

P Power line Gnd

9

R

I Three key switches inputs. 200Kohm pull low.

10

M

I/O In Z-axis key mode, M key toggling can change the scrolling speed from low to

11

L

I/O high

12

X1

13

X2

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

I dynamic input impedance will be off.

14

Y1

I

15

Y2

I

16

OSCR

I Connect 50Kohm ± 5% for oscillation

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R502-004,A

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