Document
WIN2000 3D PS/2 Mouse Controller
Features
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HT82M398A
Compatible with Microsoft Windows 2000 and 5-button Wheel Mouse Compatible with Microsoft Intelli 3D PS/2 and IBM PS/2 mouse Supports rolling buttons in PS/2 mouse mode X/Y axis photo input with built-in Holtek¢s special dynamic photo-input resistor
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Supports three buttons and three axes (X, Y, Z) inputs Z axis can support two kinds of scroller input (optomechanical and mechanical) 2MHz RC oscillator for system frequency with external pull-high resistor 16-pin DIP package
General Description
The HT82M398A is a Plug and Play WIN2000 and 5-button 3D PS/2 mouse controller. It is also compatible with Microsoft Intelli 3D PS/2 and IBM PS/2 mouse. The Z axis can support two kinds of scroller input, namely; mechanical and optomechanical.
Pin Assignment
Z 1 1 2 3 4 5 6 7 8 Z 2 V D D B 5 V S S O S C I C L K D A T A 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 Y 2 Y 1 X 2 X 1 B 4 L B R 0 R B
H T 8 2 M 3 9 8 A 1 6 D IP
1
February 22, 2000
HT82M398A
Pin Description
Pin No. 1, 2 3 4 5 6 7 8 Pin Name Z1, Z2 VDD B5 VSS OSCI CLK DATA I/O I ¾ I ¾ I I/O I/O Description Z, axis input supports two kinds of scroller input, namely; optomechanical and mechanical. Positive power supply Button 5, normal pull-low (50kW), Press connect to high. Negative power supply 2MHz RC oscillator for system frequency with external pull-high resistor and built-in Capacitor. CLK I/O, PS/2 mouse CLK line. NMOS open drain output with 5kW pull-high resistor. DATA I/O, PS/2 mouse DATA line. NMOS open drain output with 5kW pull-high resistor. Right Button: Normal pull-low (50kW), Pressing the button connects to high. Rolling Button: Normal pull-low (50kW), Pressing the button connects to high. Left Button: Normal pull-low (50kW), Pressing the button connects to high. Button 4, normal pull-low (50kW), Press connect to high. X/Y axis photo input with built-in Holtek¢s special dynamic photo input resistor
9~11
RB, RO, LB
I
12 13~16
B4 X1, X2, Y1, Y2
I I
Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 6.5V Input Voltage .................VSS-0.3V to VDD+0.3V Storage Temperature.................-50°C to 125°C Operating Temperature ..............-25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
2
February 22, 2000
HT82M398A
Electrical Characteristics
Symbol VDD IOP fOSC VIL1 VIH1 VIL2 VIH2 RPH2 Isink VIL3 VIH3 RPL3 VIL4 VIH4 RPL5 Parameter Operating Voltage Operating Current RC Oscillator Input Low Voltage (Z1, Z2) Input High Voltage (Z1, Z2) Input Low Voltage (CLK, DATA) Input High Voltage (CLK, DATA) Pull-high Resistor (CLK, DATA) Sink Current (CLK, DATA) Input Low Voltage (RB, Ro, LB) Input High Voltage (RB, Ro, LB) Pull-low Resistor (RB, Ro, LB) Input Low Voltage (X1,X2,Y1,Y2) Input High Voltage (X1, X2, Y1, Y2) Dynamic Photo-resistor (X1, X2, Y1, Y2, Z1, Z2) Test Conditions VDD ¾ 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V 5V Conditions ¾ ROSC=120kW ROSC=120kW ¾ ¾ ¾ ¾ VIL=0V VOH=0.4V ¾ ¾ VIL=0V ¾ ¾ ¾ Ta=25°C Min. Typ. Max. Unit 4.5 ¾ 1.6 0 2.2 0 2.0 2 4 0 1.8 3.0 0 2.2 5.0 ¾ 2 ¾ ¾ ¾ ¾ 5 ¾ ¾ ¾ 60 ¾ ¾ 5.5 15 2.2 1.5 5 0.8 5.0 10 ¾ 1.0 5 125 1.5 5 V mA V V V V V kW mA V V kW V V
See Dynamic resistor characteristics
Dynamic resistor characteristics
· R-V curve
Photo_R: R-V
R
V
3
February 22, 2000
HT82M398A
Functional Description
PS/2 mouse
· PS/2 status byte · Data format for 5-button Wheel Mouse
Bit No. 1st word
7 0
6 0
5
4
3 1
2 M
1 R
0 L
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
YS XS
2nd word X7 X6 X5 X4 X3 X2 X1 X0 3rd word Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 4th word 0 0 B5 B4 Z3 Z2 Z1 Z0
X movement towards the right is positive, moving towards the left is negative Y upward movement is positive, moving down is negative Z rolling towards the user is positive, else negative Button status: 1=pressed, 0=released
· 5-button Wheel Mouse Mode follows the
Variable rps, 0, 8, 1, bidirectional, synchronous Bit No. 1st word 7 6 5 4 3 1 2 M 1 R 0 L YV XV YS XS
5-button Activation Method of Windows 2000 and the 5-button Wheel Mouse Specification. ¨ 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.
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
Varia.