A.C. Characteristics
Ta=25°C
Symbol Parameter
Test Conditions
Min. Typ. Max. Unit
V
DD
Conditions
t
WDTOSC
Watchdog Oscillator Period 5V
¾
32 65 130
ms
t
WDT1
Watchdog Time-out Period 5V Without WDT prescaler 8 17 33 ms
t
RES
External Reset Low Pulse Width
¾¾
1
¾¾ms
HT82M32A/HT82M32B
Rev. 1.00 3 January 24, 2006
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
BitNo. 76543210
1st word YV XV YS XS 1 MB RO LB
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
BitNo. 76543210
1st word YV XV YS XS 1 MB RO LB
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
·
Data format for 5-button Wheel Mouse
BitNo. 76543210
1st word 0 0 YS XS 1 MB RO LB
2nd word X7 X6 X5 X4 X3 X2 X1 X0
3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
4th word 0 0 RB1 RB0 Z3 Z2 Z1 Z0
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
·
Mouse mode changes between Standard and 3D
PS/2 mode
Sending the commands in the following sequence 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
·
Mouse mode changes between Standard and Win2K
PS/2 mode.
Sending the commands in the following sequence will
set the mouse to Win2K PS/2 mode.
Command Response From Mouse
F3h
FAh
C8h
FAh
F3h
FAh
C8h
FAh
F3h
FAh
50h
FAh
F2h
FAh, 04h
¨
Any time the PC sends a reset ²FFh² 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.
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