EM84520AP Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM84520AP

2-in-one scrolling mouse controller

ELAN Microelectronics 

FUNCTION DESCRIPTIONS

EM84520

2-IN-ONE SCROLLING MOUSE CONTROLLER

Preliminary

(I) Serial Scrolling Mouse :

In Microsoft mode, the transmission cycle consists of four bytes in one report. Each byte contains one start

bit, 7 data bits and two stop bits. The first byte contains "L", "R" key status and four bits of the two most

significant bits in horizontal counter and vertical counter. The second byte represents the value accumulated

by horizontal counter, the third byte is the data of the vertical counter. The last byte contains "M" key status

and Z-axis value. The vertical data is transmitted in 2's complement.

Output byte arrange

Bit no.

1st byte

2nd byte

3rd byte

4th byte

...... 6

5

4

3

2

1

0

...... 1

L

R V7' V6' H7 H6

....

0 H5 H4 H3 H2 H1 H0

....

0 V5' V4' V3' V2' V1' V0'

....

0

0 M Z3 Z2 Z1 Z0

Plug & Play ID code

When RTS input from low to high, EM84520 will send a string ID code. Customer can specify the contains

of the code area and the total lenth below 100 bytes by changing the code layer.

Field Name

Other ID

Begin ID

PnP Revision

EISA ID

Product ID

Serial Number

Class ID

Driver ID

User Name

Length

<17

1

2

3

4

9

<34

<42

<42

Check sum

2

End PnP

1

Field Data

4D, 5A, 40, 00, 00, 00

08

01, 24

25, 2D, 23

10, 10, 10, 11

3C

3C, 2D, 2F, 35, 33, 25

3C, 30, 2E, 30, 10 26, 10, 21

3C, 25, 2D, 23, 00, 33, 23, 32,

2F, 2C, 2C, 29, 2E, 27, 00, 33,

25, 32, 29, 21, 2C, 00, 2D, 2F,

35, 33, 25

21, 15

09

Description

ID for legacy

Begin PnP ID

Version 1.00

EMC

0001

None provided

Mouse Class

PnP0F0A

EMC SCROLLING

SERIAL MOUSE

2 bytes checks um

End PnP ID

(II) Legacy PS/2 mouse operating:

(A) Operating mode

There are four operating modes in PS/2 mouse:

a. Reset Mode:

In this mode a self-test is initiated during power-on or by a Reset command. After reset signal, PS/2 mouse

will :

(a) Send completion code AA & ID code 00.

(b) Set default :

* This specification are subject to be changed without notice.

6.28.1999 3

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