
MTA41300
DS40101C-page 2
1995 Microchip Technology Inc.
Table of Contents
Page
1.0 Pin Descriptions ............................................................................................................................................................................. 3
2.0 Serial Mouse Mode Operation ....................................................................................................................................................... 4
3.0 IBM PS/2 Mode Operation ............................................................................................................................................................. 5
4.0 Motion Encoder Inputs ................................................................................................................................................................... 8
5.0 Push-Button Inputs ........................................................................................................................................................................ 9
6.0 Trackball Option ............................................................................................................................................................................. 9
7.0 Electrical Characteristics.............................................................................................................................................................. 10
8.0 Application Examples................................................................................................................................................................... 17
9.0 Packaging Diagrams and Dimensions ......................................................................................................................................... 25
10.0 Package Marking Information ...................................................................................................................................................... 27
List of Figures
Positive Motion Input ..................................................................................................................................................... 8
Negative Motion Input .................................................................................................................................................... 8
Trackball Drag Lock Operation ...................................................................................................................................... 9
Input Threshold Voltage (VTH) of all Input and I/O Pins Except MCLR and OSC1...................................................... 12
VIH VIL OF MCLR VS VDD ............................................................................................................................................ 12
Input Threshold Voltage (VTH) of OSC1 Input ............................................................................................................. 13
IOH VS VOH, VDD = 3V .................................................................................................................................................. 13
IOH VS VOH, VDD = 5V .................................................................................................................................................. 13
IOL VS VOL, VDD = 3V................................................................................................................................................... 14
IOL VS VOL, VDD = 5V................................................................................................................................................... 14
Timing Diagrams.......................................................................................................................................................... 16
MTA41300 Based PS/2 Mouse or Trackball................................................................................................................ 18
MTA41300 Based Serial Mouse or Trackball .............................................................................................................. 19
MTA41300 Based Serial - PS/2 Combo Mouse .......................................................................................................... 20
RS232 to PS/2 Adapter Plug Wiring for MTA41300 .................................................................................................... 21
Basic Mouse/Trackball Optical Motion Encoder .......................................................................................................... 22
Improved Mouse/Trackball Optical Motion Encoder .................................................................................................... 23
Mouse/Trackball Mechanical Motion Encoder ............................................................................................................. 24