TP8452AP Просмотр технического описания (PDF) - Topro

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TP8452AP

PS/2 2D 3Key Mouse Controller

Topro 

TP8452

PS/2 2D 3Key Mouse

Controller

(B) PS/2 Mouse Data Report:

a. In stream mode: A data report is sent at the end of a sample interval.

b. In remote mode: A data report is sent in response to Read Data command.

c. Data report format:

Byte

Bit

1

0

1

2

3

4

5

6

7

2

0-7

3

0-7

Description

Left button status; 1 = pressed

Right button status; 1 = pressed

Middle button status; 1 = pressed

Reserved

X data sign; 1 = negative

Y data sign; 1 = negative

X data overflow; 1 = overflow

Y data overflow; 1 = overflow

X data ( D0 - D7 )

Y data ( D0 - D7 )

(C) PS/2 mouse Data Transmission:

a. TP8452 generates the clocking signal when sending data to and receiving data from the

system.

b. The system requests TP8452 to receive system data output by forcing the DATA line to an

inactive level then allowing CLK line to go to an active level.

c. Data transmission frame:

Bit

Function

1

Start bit ( always 0 )

2-9

Data bits ( D0 - D7 )

10

Parity bit ( odd parity )

11

Stop bit ( always 1 )

Page 9 of 20

TOPRO CONFIDNETIAL

2003/7/31 Print

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