EM84520BP Ver la hoja de datos (PDF) - ELAN Microelectronics

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Fabricante

EM84520BP

2-in-one scrolling mouse controller

ELAN Microelectronics 

EM84520

2-IN-ONE SCROLLING MOUSE CONTROLLER

Preliminary

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

d). EM84520 receives a Resend command ( FE ), it transmit its last packet of data.

e). In the stream mode “Resend” is received by EM84520 following a 3-byte data packet transmission

to the system. EM84520 resend the 3-byte data packet prior to clearing the counter.

f). A response is sent within 25 ms if

a). The system requires a response

b). An error is detected in the transmission

g). If EM84520 is in the stream mode :

a). The system disables EM84520 before issuing any command requiring a response.

b). 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 EM84520. 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 Auto-speed

Reset Auto-speed

EM84520 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 )

EM84520 operation:

a). Completion the reset.

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

* This specification are subject to be changed without notice.

6.28.1999 6

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