EM84510
PS/2 SCROLLING MOUSE CONTROLLER
FUNCTIONAL BLOCK DIAGRAM
THREE TYPES SELECTOR
Z1
Z2
COMPARATOR
VOLTAGE
SENSOR
Z-AXIS COUNTER
KEY-SWITCH
DETECTOR
DATA CLK
OPT
X1
X2
Y1
Y2
C
O
M
P
A
R
A
T
O
R
D
ME
O T
T E
I C
O T
NO
R
COUNTER
MULTIPLEXER
DATA
I/O
L
M
R
D
E
B
O
U
N
C
E
COMMON
STATUS
TIMING
CONTROLLER
SYSTEM CLOCK
GENERATOR
OSCR
OSC.OUT
RC
OSCILLATION
PIN DESCRIPTIONS
Symbol
OPT
I/O
I/O
Function
INPUT: 200kohm pull low to VSS.
When OPT is connected to VDD, EM84510 will enter test mode. In test mode,
L will be the output of X1,while M will be the output of X2. Toggling R key can
change these output to be Y1,Y2 or Z1,Z2 respectively.
OUTPUT: 2kHz Z-axis LED driving source.
"1"= VDD, "0"= floating
High duty is about 60us.
RC mode oscillation with 51kohm resistor.
Connect to 8042 auxiliary port CLK line.
Connect to 8042 auxiliary port DATA line.
Three key-switches inputs.
200kohm resistor pull low.
Three step dynamic input impedance.
Use current comparator to measure photo-couples "ON" ,or "OFF".
OSC.OUT
OSCR
CLK
DATA
R/M/L
X1
X2
Y1
Y2
Z1
Z2
O
I
I/O
I/O
I
I
VSS
VDD
Z-axis inputs.
Photo mode: Three step dynamic input impedance. Current comparator input.
Key mode: 200kohm resistor pull low. 7 levels increased by "M" key.
Voltage mode: 200kohm resistor pull low. 7 levels voltage comparator.
Mechanical mode : 13.2kohm resistor pull low.
Negative power.
Power line.
* This specification are subject to be changed without notice.
5.30.2001
2
EMC [ ELAN MICROELECTRONICS CORP ]
