em84502 ELAN Microelectronics Corp, em84502 Datasheet - Page 7

• Manufacturer Part Number: em84502
• Description: Ps/2 Mouse Encoder
• Manufacturer: ELAN Microelectronics Corp

* This specification are subject to be changed without notice.
ABSOLUTE MAXIMUM RATINGS
Temperature under bias
Storage temperature range
Input voltage
Output voltage
n). Set Resolution ( E8,XX )
o). Set Autospeed ( E7 )
p). Reset Autospeed ( E6 )
F) Testing mode
EM84502 provides four resolutions selected by the second byte of this command as follows:
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:
This command restore normal speed.
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.
Parameter
2
3
Input
0
1
2
3
4
5
N( 6 )
Second Byte XX
3
4
5
6
7
0-7
0-7
00
01
02
03
T
T
V
Sym.
V
OPR
STR
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 )
IN
O
8 dot/count
4 dot/count
2 dot/count
1 dot/count
Resolution
Ouput
0
1
1
3
6
9
2.0*N
-65~150
-0.3~6.0
-0.3~6.0
Ratings
0~70
PS/2 MOUSE CONTROLLER
Unit
V
V
C
C
6.18.1998
EM84502
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