EM84502

PS/2 MOUSE CONTROLLER

7

* This specification are subject to be changed without notice.

6.18.1998

n). Set Resolution ( E8,XX )

EM84502 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

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 )

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.

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

Sym.

Ratings

Unit

Temperature under bias

T

OPR

0~70

°C

Storage temperature range

T

STR

-65~150

°C

Input voltage

V

IN

-0.3~6.0

V

Output voltage

V

O

-0.3~6.0

V