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EM84502AP

PS/2 MOUSE CONTROLLER

ELAN Microelectronics 

EM84502

PS/2 MOUSE CONTROLLER

3

4

5

6

7

2

0-7

3

0-7

Reserved

0 = Normal speed, 1 = Autospeed

0 = Disabled, 1 = Enabled

0 = Stream mode, 1 = Remote mode

Reserved

Current resolution setting ( D0 - D7 )

Current sampling rate ( D0 - D7 )

n). Set Resolution ( E8,XX )

EM84502 provides four resolutions selected by the second byte of this command as follows:

Second Byte XX

00

01

02

03

Resolution

8 dot/count

4 dot/count

2 dot/count

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

0

1

2

3

4

5

N(≥6 )

Ouput

0

1

1

3

6

9

2.0*N

p). Reset Autospeed ( E6 )

This command restore normal speed.

F) Testing mode

Whenever OPT is connected to OSC OUT, the chip will enter buyer's testing mode. The X direction output

signals of comparators will present to L and M pin. Pressing "R" key can toggle the output from X direction

to Y direction.

ABSOLUTE MAXIMUM RATINGS

Parameter

Temperature under bias

Storage temperature range

Input voltage

Output voltage

Sym.

T

OPR

TSTR

VIN

VO

* This specification are subject to be changed without notice.

Ratings

0~70

-65~150

-0.3~6.0

-0.3~6.0

Unit

°C

°C

V

V

6.18.1998 7

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