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EM84510BP

PS/2 SCROLLING MOUSE CONTROLLER

ELAN Microelectronics 

EM84510

PS/2 SCROLLING MOUSE CONTROLLER

iii). The counter accumulators are cleared after receiving any command except “Resend”.

iv). EM84510 receives a Resend command ( FE ), it transmit its last packet of data.

v). In the stream mode “Resend” is received by EM84510 following a 3-byte data packet transmission

to the system. EM84510 resend the 3-byte data packet prior to clearing the counter.

vi). A response is sent within 25 ms if

a). The system requires a response

b). An error is detected in the transmission

vii). When a command requiring a response is issued by the system ,another command should not be issue

until either the response is received or 25ms has passed.

E). PS/2 Mouse Commands Description:

There are 16 valid commands that transmits between the system and EM84510. The “FA” code is always the

first response to any valid input received from the system other than a Set Wrap Mode or Resend command.

The following table list the commands:

Hex Code

FF

FE

F6

F5

F4

F3,XX

F2

F0

EE

EC

EB

EA

E9

E8,XX

E7

E6

Command

Reset

Resend

Set Default

Disable

Enable

Set Sampling Rate

Read Device Type

Set Remote Mode

Set Wrap Mode

Reset Wrap Mode

Read Data

Set Stream Mode

Status Request

Set Resolution

Set Autospeed

Reset Autospeed

EM84510 echo code

FA,AA,00

XX,(XX,XX)

FA

FA

FA

FA,FA

FA,00

FA

FA

FA

FA,XX,XX,XX

FA

FA,XX,XX,XX

FA,FA

FA

FA

The following describes valid commands:

a). Reset ( FF )

EM84510 operation:

i). Completion the reset.

ii). Transmitted FA,AA,00 to the system.

iii). Set default:

sampling rate: 100 reports/s

non-autospeed

* This specification are subject to be changed without notice.

5.30.2001 5

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