Interlink-electronics MicroModule PS2 Manual do Utilizador descarregar pdf (Página 13)

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PS2 MicroModule

Integration Guide

7.0 PS/2 Information

Communication from the host to the microprocessor is done via PS/2 and:

 Uses the PS/2 standard

 Is compatible with any PS/2 host

 Will attach as a standard 2 button mouse, or as a 3 button scroll mouse

The microprocessor reports data to the host at a rate of 50 reports/sec, regardless of host

attempts to change the report rate.

7.1 Data Packet

The data packet from the chip is organized as:

Byte1

Bit 

0 LeftButtonStatus

1 RightButtonStatus

2 Always=0(Reservedformiddle

button)

3 Always=1

4 XdataSign,1=negative

5 Ydatasign,1=negative

6 Xdataoverflow,1=overflow

7 Ydataoverflow,1=overflow

Byte2

Bit 

0 LSBofXdata

1 Xdata

2 Xdata

3 Xdata

4 Xdata

5 Xdata

6 Xdata

7 MSBofXdata

1 2 ... 8 9 10 11 12 13 14 15 16 17 18

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Interlink-electronics MicroModule PS2 Manual do Utilizador Página 13