EM84510

PS/2 SCROLLING MOUSE CONTROLLER

7

* This specification are subject to be changed without notice.

5.30.2001

l). Set Stream Mode ( EA )

This command sets EM84510 in stream mode.

m). Status Request ( E9 )

When this command is issued by the system, EM84510 respond with a 3-byte status report as follows:

Byte

Bit

Description

1

0

1 = Right button pressed

1

1 = Middle button pressed

2

1 = Left button pressed

3

Reserved

4

0 = Normal speed, 1 = Autospeed

5

0 = Disabled, 1 = Enabled

6

0 = Stream mode, 1 = Remote mode

7

Reserved

2

0-7

Current resolution setting ( D0 - D7 )

3

0-7

Current sampling rate ( D0 - D7 )

n). Set Resolution ( E8,XX )

EM84510 provides four resolutions selected by the second byte of this command as follows:

Second Byte XX

Resolution

00

8 dot/count

01

4 dot/count

02

2 dot/count

03

1 dot/count

o). Set Autospeed ( E7 )

At the end of a sample interval in the stream mode, the current X and Y data values are converted new values.

The sign bits are not involved in this conversion. The conversion is only in stream mode. The relationship

between the input and output count follows:

Input

Ouput

00

11

21

33

46

59

N(

≥6 )

2.0*N

p). Reset Autospeed ( E6 )

This command restore normal speed.