ht82m398a Holtek Semiconductor Inc., ht82m398a Datasheet - Page 3

• Manufacturer Part Number: ht82m398a
• Description: Ht82m398a -- 5-key 3d Win2000 Ps/2 Mouse Controller
• Manufacturer: Holtek Semiconductor Inc.

Functional Description
PS/2 mouse
Timing Diagrams
X, Y Axis Photo-coupler Cross Width
Rev. 1.40
1st word
2nd word
3rd word
1st word
2nd word
3rd word
4th word
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
Data format for 3D PS/2
Variable rps, 0, 8, 1, bidirectional, synchronous
Bit No.
Bit No.
(different from IBM specs.)
X7
Y7
Z7
YV XV YS XS
X7 X6 X5
Y7 Y6 Y5
7
0
7
X6
Y6
Z6
6
6
0
YS XS
X5
Y5
Z5
5
5
X4
Y4
X4
Y4
Z4
4
4
X3 X2
Y3 Y2
X3 X2 X1 X0
Y3 Y2 Y1 Y0
Z3
3
1
3
1
M
Z2
2
M
2
X1
Y1
Z1
R
R
1
1
Z0
X0
Y0
0
L
0
L
3
The x/y data report is 9-bit 2 s complement
The z data report is 8-bit 2 s complement
X movement towards the right is positive, moving to-
wards the left is negative
Y upward movement is positive, moving down is nega-
tive
Z rolling towards the user is positive, else negative
Button status: 1=pressed, 0=released
1st word
2nd word
3rd word
4th word
Data format for 5-button Wheel Mouse
5-button Wheel Mouse Mode follows the 5-button Ac-
tivation Method of Windows 2000 and the 5-button
Wheel Mouse Specification.
Bit No.
Any time the PC sends a reset FFH command 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.
X7
Y7
7
0
0
X6
Y6
6
0
0
YS XS
X5
Y5
B5
5
X4
Y4
B4
4
X3 X2 X1
Y3 Y2 Y1
Z3
HT82M398A
3
1
October 12, 2006
Z2
M
2
Z1
R
1
X0
Y0
Z0
0
L