EM84520

2-IN-ONE SCROLLING MOUSE CONTROLLER

3

* This specification are subject to be changed without notice.

6.28.1999

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

FUNCTION DESCRIPTIONS

(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.

......

654321

0

1st byte

......

1

L

R

V7'

V6'

H7

H6

2nd byte

....

0

H5

H4

H3

H2

H1

H0

3rd byte

....

0

V5'

V4'

V3'

V2'

V1'

V0'

4th byte

....

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

Length

Field Data

Description

Other ID

<17

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

ID for legacy

Begin ID

1

08

Begin PnP ID

PnP Revision

2

01, 24

Version 1.00

EISA ID

3

25, 2D, 23

EMC

Product ID

4

10, 10, 10, 11

0001

Serial Number

9

3C

None provided

Class ID

<34

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

Mouse Class

Driver ID

<42

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

PnP0F0A

User Name

<42

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

EMC SCROLLING

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

SERIAL MOUSE

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

35, 33, 25

Check sum

2

21, 15

2 bytes checks um

End PnP

1

09

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 :