SC84520 Datasheet PDF - Silan Microelectronics

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SC84520
Silan Microelectronics

Part Number SC84520
Description TWO IN ONE SCROLLING MOUSE CONTROLLER
Page 19 Pages


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Silan
Semiconductors
SC84520
TWO IN ONE SCROLLING MOUSE
CONTROLLER
DESCRIPTION
The SC84520 Scrolling Mouse Controller id specially designed to
control serial mouse or PS/2 mouse device. This single chip can
interface three key-switched and 4 X-Y photo-couples plus Z-axis
directly plus Z-axis directly to RS-232C or 8042 controller.
There are four types Z-axis inputs used to implement scrolling
mouse functionality.
FEATURES
*Using 50kΩ ± 1% resistor for RC oscillation
*Compatible with legacy PS/2 mouse
*Compatible with Microsoft serial scrolling mouse
*Compatible with Microsoft PS/2 scrolling mouse
*Serial or PS/2 port auto-detect
*100 bytes PnP ID code could be filled by code layer
*Built-in noise immunity circuit
*The sampling rate of motion detector is up to 65 kHz
*Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD
*CMOS push-pull RXD output
*Built-in current comparator for photo-couples input
*Built-in three step dynamic input impedance
*Three key-switches and four photo-coupled inputs
*RTS debouncing circuit include
*Photo couple test mode include
*Low power dissipation
*Six types Z direction input:
1. Photo couples input (Z/1)
2. Key-switches input
3. Voltage-sensing input
4. Mechanical input(Z/1)
5. Photo couples input (Z/4)
6. Mechanical input (Z/2)
DIP-16
*Package type:
SC84510AP: 16DIP, Photo coupled
input(Z/1)
SC84510BP: 16DIP, Key-switches input
SC84510CP: 16DIP, Voltage-sensing
Input
SC84510DP: 16DIP, Mechanical input
(Z/1)
SC84510EP: 16DIP, Photo couples input
(Z/4)
SC84510FP: 16DIP, Mechanical input
(Z/2)
APPLICATIONS
*Serial PnP scrolling mouse
*PS/2 scrolling mouse
*Combo PnP scrolling mouse
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
1



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Semiconductors
PIN CONFIGURATIONS
VDD 1
OSC OUT 2
Z1 3
Z2 4
CLK/RTS 5
DATA/RXD 6
OPT 7
VSS 8
16 OSCR
15 Y2
14 Y1
13 X2
12 X1
11 L
10 M
9R
SC84520
BLOCK DIAGRAM
Z1 3
Z2 4
OPT 7
X1 12
X2 13
Y1 14
Y2 15
L 11
M 10
R9
OSCR 16
OSC OUT 2
DATA/RXD CLK/RTS
65
THREE TYPES SELECTOR
COMPARATOR
VOLTAGE
SENSOR
KEY-SWITCH
DETECTOR
Z-AXIS COUNTER
COUNTER
MULTIPLEXER
DATA
I/O
COMMAND
STATUS
TIMING
CONTROLLER
SYSTEM CLOCK GENERATOR
RC OSCILLATION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
2



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Semiconductors
SC84520
ABSOLUTE MAXIMUM RATINGS (Tamb=25°C, unless otherwise specified)
Characteristic
Symbol
Value
Supply Voltage
VSS -0.3 ~ +7.5
Temperature Under Bias
0 ~ 70
Storage Temperature range
TOPR
-65 ~ +150
Power Dissipation
PD
500
DC ELECTRICAL CHARACTERISTICS (Tamb=25~70°C)
Parameter
Symbol
Operating Voltage
VDD
Operating Current (VDD=5.4V, RTS=VDD, 32.768kHz, No Load)
Operating Current (VDD=6.2V, RTS=VDD, 32.768kHz, No Load)
Iop
Iop
Operating Current (VDD=5.4V, RTS=VDD, 3.58MHz, No Load)
Operating Current (VDD=6.2V, RTS=VDD, 3.58MHz, No Load)
Iop
Iop
RTS Operating Current (VDD=5.6V, RTS=11V)
RTS Operating Current (VDD=5.6V, RTS=11.8V)
RXD High Output Current (Vrh=Vrts-2.6V)
IRTS
IRTS
Irh
RXD Low Output Current (Vrl=Vss+2.6V)
Irl
X1,X2,Y1,Y2 Low Input Voltage
Vpl
X1,X2,Y1,Y2 High Input Voltage
Vph
X1,X2,Y1,Y2 Input Current (Pull Low Resistor, Vds=1.0V)
Ipi
RTS High Input Voltage
Vth
RTS Low Input Voltage
Vtl
Low Input Voltage, Other Pins
Vail
High Input Voltage, Other Pins
Vaih
L,M,R,OPT Input Current
(Pull Low Resistor, Vds=5.6V) Imi
Rs,Osc-In,L,M,R,X1,X2,Y2,Y2,Opt
Input Leakage Current
(Vin=0V)
Iil
RS, OSC-IN Input Leakage Current
(Vin=5.6V)
NOTE: *All voltages in above table are compared with VSS.
Iih
*All parameters in above table are tested under VDD=5.6V
Min
--
--
3
--
4
--
3
2.0
--
--
1.3
57
9.6
--
--
3.5
18.6
0
-1.0
Typ
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Unit
V
°C
°C
mW
Max
6.5
0.6
--
1.6
--
0.6
--
--
-2.0
0.7
--
104
--
6.8
1.5
--
56
1.0
0
Unit
V
mA
mA
mA
mA
mA
mA
mA
mA
V
V
µA
V
V
V
V
µA
µA
µA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
3



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Semiconductors
SC84520
AC ELECTRICAL CHARACTERISTICS (Tamb=25~70°C)
PS/2 mouse mode:
Parameter
Symbol Min
Typ Max Unit
Oscillating Frequency
Fosc 37-3% 37 37+3% kHz
Key Debounce
Tkd -- 12 -- ms
Rising Edge Crossed Width
Tr 13.5 --
-- µs
Falling Edge Crossed Width
Tf 13.5 --
-- µs
Mouse CLK Active Time
Tmca
--
40.5
--
µs
Mouse CLK Inactive Time
Tmci -- 40.5 --
µs
Time that Mouse Sample DATA from CLK rising Edge
Tmdc
--
13.5
--
µs
System CLK Active Time
Tsca -- 40.5 --
µs
System CLK Inactive Time
Tsci -- 40.5 --
µs
Time from DATA Transition to Falling Edge of CLK
Tsdc -- 13.5 --
µs
Time from rising Edge of CLK to DATA Transition
Tscd
--
27
--
µs
Time to mouse Inhibit after the 11th CLK to
ensure mouse does not start another Transmission
Tpi 0
-- 50 µs
Serial mouse mode:
Parameter
Oscillating Frequency
Key Debounce
Rising Edge Crossed Width
Falling Edge Crossed Width
Transmission Time
Start bit time
Data bit time
Stop bit time
Mode code delay Time
Symbol Min
Fosc 32.4-3%
Tkd --
Tr 15.4
Tf 15.4
Tmx
--
Ts --
Td --
Tp --
Trd 11
Typ
32.4
13
--
--
33.33
833.3
833.3
833.3
--
Max
32.4+3%
--
--
--
--
--
--
--
14
Unit
kHz
ms
µs
µs
ms
µs
µs
µs
ms
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
4



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SC84520 TWO IN ONE SCROLLING MOUSE CONTROLLER SC84520
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