EM84510
PS/2 SCROLLING MOUSE CONTROLLER
FUNCTIONAL BLOCK DIAGRAM
THREE TYPES SELECTOR
Z1
Z2
VOLTAGE
SENSOR
KEY-SWITCH
DETECTOR
COMPARATOR
DATA CLK
Z-AXIS COUNTER
C
D
E
T
E
C
T
O
R
OPT
X1
O
M
P
A
R
A
T
M
O
T
I
O
N
DATA
I/O
COUNTER
MULTIPLEXER
X2
Y1
O
R
Y2
D
E
L
M
R
B
O
U
N
C
E
COMMON
STATUS
TIMING
CONTROLLER
SYSTEM CLOCK
GENERATOR
OSCR
OSC.OUT
RC
OSCILLATION
PIN DESCRIPTIONS
Symbol
I/O
Function
INPUT: 200kohm pull low to VSS.
OPT
I/O
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.
OSC.OUT
OSCR
CLK
DATA
R/M/L
O
I
I/O
I/O
I
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.
X1
X2
Y1
Y2
Z1
Z2
I
Three step dynamic input impedance.
Use current comparator to measure photo-couples "ON" ,or "OFF".
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.
VSS
VDD
Power line.
5.30.2001
* This specification are subject to be changed without notice.
2
ELAN [ ELAN MICROELECTRONICS CORP ]
