EKM6211 Ver la hoja de datos (PDF) - ELAN Microelectronics

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EKM6211

RF Mouse Rx Controller

ELAN Microelectronics 

eKM6211

RF Mouse Rx Controller

6.1.2 PS/2 Mouse Data Report

6.1.2.1 In stream mode

A data report is sent at the end of a sample interval.

6.1.2.2 In remote mode

A data report is sent in response to Read Data command.

6.1.2.3 Data report format

Byte

1

2

3

Bit

Description

0

Left button status; 1 = pressed

1

Right button status;1 = pressed

2

Middle button status; 1 = pressed

3

Reserved

4

X data sign; 1 = negative

5

Y data sign; 1 = negative

6

X data overflow; 1 = overflow

7

Y data overflow; 1 = overflow

0-7

X data ( D0 - D7 )

0-7

Y data ( D0 - D7 )

6.1.3 PS/2 Mouse Data Transmission

eKM6211 generates the clocking signal when sending data to and receiving data from

the system.

The system requests eKM6211 receive system data output by forcing the DATA line to

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

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 )

Data Output (data from eKM6211 to system):

If CLK is low (inhibit status), data is no transmission. If CLK is high and DATA is low

(request-to-send), data is updated. Data is received from the system and no

transmission are started by eKM6211 until CLK and DATA both high. If CLK and DATA

both are high, the transmission is ready. DATA is valid prior to the falling edge of CLK

and beyond the rising edge of CLK. During transmission, eKM6211 check for line

contention by checking for an inactive level on CLK at intervals not to exceed 100u sec.

4•

Product Specification (V1.0) 11.15.2003

(This specification is subject to change without further notice)

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