ht82m938r Holtek Semiconductor Inc., ht82m938r Datasheet - Page 3

• Manufacturer Part Number: ht82m938r
• Description: 27mhz 3d Ps2 Mouse Controller
• Manufacturer: Holtek Semiconductor Inc.

Functional Description
Change ID procedure
PS/2 mouse
Rev. 1.30
1st word
2nd word
3rd word
First press Receiver RESET key, the LED will blink
very quickly.
Now press Transmitter L, M, R button at least
3-minutes, the mouse will jump to change ID mode
and output a change ID signal to the receiver.
At the same time, the LED of the Receiver will blink
slowly to wait the change ID information.
The user can decide which ID to be changed by press-
ing M button. If the user wants to change ID to 4, just
press the M button four time (This mouse support 8
ID).
After deciding the ID number, the user can easy return
to normal mode by pressing the L or R button once.
After the Receiver receive the END signal of the
change ID, the LED will no longer blink and the Re-
ceiver returns to normal mode.
PS/2 status byte
Bit
7:
6:
5:
4:
3:
2:
1:
0:
Standard PS/2 data format
Variable rps, 0, 8, 1, bidirectional synchronous.
Bit No.
RESERVED
0=STREAM MODE, 1=REMOTE MODE
0=DISABLED, 1=ENABLED
0=SCALING 1:1, 1=SCALING 2:1
RESERVED
1=LEFT BUTTON PRESSED
1=MIDDLE BUTTON PRESSED
1=RIGHT BUTTON PRESSED
YV XV YS XS
X7
Y7
7
X6
Y6
6
X5
Y5
5
X4
Y4
4
X3
Y3
3
1
X2
Y2
M
2
X1
Y1
R
1
X0
Y0
0
L
3
Note:
1st word
2nd word
3rd word
4th word
Data format for 3D PS/2
Variable rps, 0, 8, 1, bidirectional synchronous.
Mouse mode changes between standard and 3D
PS/2 mode
5-button wheel mouse mode follows the 5-button acti-
vation method of Windows 2000 and 5-button wheel
mouse specification.
Bit No.
Sending the commands in the following sequence
will set the mouse to 3D PS/2 mode.
Command
F3h
C8h
F3h
64h
F3h
50h
F2h
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.
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,
movement 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
YV XV YS XS
X7
Y7
Z7
7
HT82M938T/HT82M938R
X6
Y6
Z6
6
X5
Y5
Z5
5
X4
Y4
Z4
4
Response from mouse
FAh
FAh
FAh
FAh
FAh
FAh
Fah
X3
Y3
Z3
3
1
October 29, 2002
X2
Y2
Z2
M
2
X1
Y1
Z1
R
1
X0
Y0
Z0
0
L