SILAN SC83702 Datasheet
Silan
Semiconductors
ALL IN ONE MOUSE CONTROLLER
DESCRIPTION
The SC83702 Mouse Controller is specially designed to control
mouse device. This single chip can interface three key-switches and
four photo-couple direct to RS-232C. The SC83702 does not need
any external power supply, so the mouse can go without a power
line. It is versatile with both microsoft and mouse system.
Debouncing circuit were provided to prevent false entry and to
improve the accuracy. In 1200 baud rate non-auto speed with 200
DPI wheels and photo-couples, the scanning is 650mm/sec without
missing a dot in microsoft mode, and the scanning speed can up to
770mm/sec in mouse system mode.
SC83702
SOP-16
DIP-16
FEATURES
*Built-in two zener diode between VDD and VSS, RTS and VDD
*Built-in noise immunity circuit
*CMOS DIP 16 pins package&SOP 16 pins package
*Low power dissipation
*Use 32.768KHz crystal or 3.58MHz resonator
*Oscillator circuits on-chip
*Serial output in 1200 baud rate
*Can be powered directly from RS-232C
*Can drive directly to RS-232C
*Three key-switches and four photo-couples inputs
*Both key-in and key-release debounce interval 13ms
PIN CONFIGURATIONS
RS
MS
OSCI
OSCO
RTS
RXD
VSS
R
1
2
3
4
SC83702A
5
6
7
8
16
15
14
13
12
11
10
VDD
OPT
Y2
Y1
X2
X1
L
M
9
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
1
*Through three key-switches input,
SC83702 can exert seven different output
*The sampling rate of motion detector is
65KHz
APPLICATIONS
*Optical mouse or pen-mouse
*Mechanical mouse or pen-mouse
*Optomechanical mouse or pen-mouse
*Mechanical track ball
*Optomechanical track ball
RS
OPT
MS
OSCI
OSCO
RTS
RXD
VSS
1
2
3
4
SC83702B
5
6
7
8
16
15
14
13
12
11
10
VDD
Y2
Y1
X2
X1
L
M
R
9
Rev: 1.0 2000.12.31
Silan
Semiconductors
BLOCK DIAGRAM
OPT
2
X1
12
X2
13
Y1
14
Y2
15
L
11
M
10
R
9
MS
3
RS
1
OSCO
5
OSCI
14
MOTION
DETECTOR
DEBOUNCE
SYSTEM
CLOCK
GENERATOR
NOISE
IMMUNITY
VDD Vss
16 8
SELECTOR
MODE
MULTI-
PLEXER
CONTROLLER
LEVEL
SHIFT
CIRCUIT
SC83702
P/S
TIMING
RXD
7
RTS
6
NOTE: The pin numbers refer to SC83702B.
ABSOLUTE MAXIMUM RATINGS
Characteristic Value Unit
Supply Voltage
Temperature Under Bias 0~70
Storage Temperature -65~+150
Power Dissipation 600 mW
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
(Tamb=25°C, unless otherwise specified)
V
Vss -0.3~+7.0 V
DD-
RTS-Vss -0.3~+14 V
Rev: 1.0 2000.12.31
2
°C
°C
Silan
Semiconductors
DC ELECTRICAL CHARACTERISTICS
Parameter Symbol Min Typ Max Unit
Operating Voltage
Operating Current (VDD=5.4V, RTS=VDD, 32.768kHz, No Load) Iop -- -- 0.6 mA
Operating Current (VDD=6.2V, RTS=VDD, 32.768kHz, No Load) Iop 3 -- -- mA
Operating Current (VDD=5.4V, RTS=VDD, 3.58MHz, No Load) Iop -- -- 1.6 mA
Operating Current (VDD=6.2V, RTS=VDD, 3.58MHz, No Load) Iop 4 -- -- mA
RTS Operating Current (VDD=5.6V, RTS=11V) I
RTS Operating Current (VDD=5.6V, RTS=11.8V) I
RXD High Output Current (Vrh=Vrts-2.6V) Irh 2.0 -- -- mA
RXD Low Output Current (Vrl=Vss+2.6V) Irl -- -- -2.0 mA
X1,X2,Y1,Y2 Low Input Voltage Vpl -- -- 0.7 V
X1,X2,Y1,Y2 High Input Voltage Vph 1.3 -- -- V
X1,X2,Y1,Y2 Input Current (Pull Low Resistor, Vds=1.0V) Ipi 57 -- 104
RTS High Input Voltage Vth 9.6 -- -- V
RTS Low Input Voltage Vtl -- -- 6.8 V
Low Input Voltage, Other Pins Vail -- -- 1.5 V
High Input Voltage, Other Pins Vaih 3.5 -- -- V
L,M,R,OPT Input Current (Pull LowResistor, Vds=5.6V) Imi 18.6 -- 56
Rs,Osc-In,L,M,R,X1,X2,Y2,Y2,Opt
Input Leakage Current (Vin=0V)
RS, OSC-IN Input Leakage Current (Vin=5.6V) Iih -1.0 -- 0
NOTE: *All voltages in above table are compared with VSS.
*All parameters in above table are tested under V
AC ELECTRICAL CHARACTERISTICS
Parameter Symbol Min Typ Max Unit
Key debounce Tkd -- 13 -- ms
Transmission time mouse(1200) Tms -- 41.1 -- ms
Transmission time microsoft(1200) Tmx -- 24.7 -- ms
Start bit time (1200) Ts -- 0.85 -- ms
Data bit time (1200) Td -- 0.82 -- ms
Stop bit time (1200) Tp -- 0.82 -- ms
Mode code delay time (1200) Trd 11.9 -- 14 ms
Rising edge crossed width Tr 15 -- -Falling edge crossed width Tf 15 -- --
(Tamb=25~70°C, VDD=5.6V)
V
DD
V
RTS
RTS
RTS
Iil 0 -- 1.0
=5.6V
DD
(Tamb=25~70°C)
-- -- 6.5 V
-- -- 13 V
-- -- 0.6 mA
3----mA
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
3
SC83702
µA
µA
µA
µA
µs
µs
Rev: 1.0 2000.12.31
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