HT82M39A(1999) Ver la hoja de datos (PDF) - Holtek Semiconductor

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HT82M39A
(Rev.:1999)

3D PS/2 Mouse Controller

Holtek Semiconductor 

Functional Description

PS/2 mouse

· PS/2 status byte

Byte 1

bit

7: Reserved

6: 0=Stream Mode, 1=Remote Mode

5: 0=Disabled, 1=Enabled

4: 0=Scaling 1:1, 1=Scaling 2:1

3: 1=Wrap Mode, 0=Stream or Remote

(different from IBM specs.)

2: 1=Left Button Pressed

1: 1=Middle Button Pressed

0: 1=Right Button Pressed

Byte 2

Bit 0~7 current resolution setting

(Bit 0=LSB)

Byte 3

Bit 0~7 current sampling rate (Bit 0=LSB)

· Standard PS/2 data format

Variable rps, 0, 8, 1, bidirectional, synchronous

Bit No. 7 6 5 4 3 2 1 0

1st word YV XV YS XS 1 M R L

2nd word X7 X6 X5 X4 X3 X2 X1 X0

3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0

· Data format for 3D PS/2

Variable rps, 0, 8, 1, bidirectional, synchronous

Bit No. 7 6 5 4 3 2 1 0

1st word YV XV YS XS 1 Ro R L

2nd word X7 X6 X5 X4 X3 X2 X1 X0

3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0

4th word Z7 Z6 Z5 Z4 Z3 Z2 Z1 Z0

The x/y data report is 9-bit 2¢s complement

The z data report is 8-bit 2¢s complement

HT82M39A

X movement towards the right is positive, mov-

ing towards the left is negative

Y upward movement is positive, moving down

is negative

Z rolling towards the user is positive, else nega-

tive

Button status: 1=pressed, 0=released

· Mouse mode changes between Standard and

3D PS/2 mode

Sending the commands in the following se-

quence will set the mouse to 3D PS/2 mode.

Command Response From Mouse

F3h

FAh

C8h

FAh

F3h

FAh

64h

FAh

F3h

FAh

50h

FAh

F2h

FAh, 03h

¨ Any time the PC sends a reset ²FFh² com-

mand to the mouse, it will reset the mouse

to Standard PS/2 mode.

¨ After power-on reset is initiated, the mouse

is set to Standard PS/2 mode.

4

August 5, 1999

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