HT82M398 Holtek Semiconductor Inc, HT82M398 Datasheet - Page 4

• Manufacturer Part Number: HT82M398
• Description: WIN2000 3D PS/2 Mouse Controller
• Manufacturer: Holtek Semiconductor Inc

Functional Description
PS/2 mouse
·
·
·
The x/y data report is 9-bit 2¢s complement
The z data report is 8-bit 2¢s complement
1st word
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
1st word
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
Bit No.
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
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.
Data format for 3D PS/2
Variable rps, 0, 8, 1, bidirectional, synchronous
(different from IBM specs.)
YV XV YS XS
7
0
7
6
6
0
YS XS
5
5
4
4
3
1
3
1
M
2
M
2
R
1
R
1
0
L
L
0
4
·
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
·
1st word
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
4th word
Bit No.
Data format for 5-button Wheel Mouse
5-button Wheel Mouse Mode follows the
5-button Activation Method of Windows 2000
and the 5-button Wheel Mouse Specification.
¨
¨
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.
7
0
0
6
0
0
YS XS
B5 B4 Z3 Z2 Z1 Z0
5
4
HT82M398A
3
1
February 22, 2000
M
2
R
1
0
L