SC83053 Datasheet PDF - Silan Microelectronics

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SC83053
Silan Microelectronics

Part Number SC83053
Description KEYBOARD ENCODER
Page 27 Pages


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Silan
Semiconductors
SC83053
KEYBOARD ENCODER
DESCRIPTION
The SC83053 is dedicated to a keyboard encoder, specially
designed for IBM PC AT and all compatible machines. The
SC83053 control all scan codes, three LEDs status, scan timing
and communications between the keyboard and PC. It is easy to
implement a high performance, low cost keyboard with the minimal
external components.
FEATURES
4 32
5
6
7
8
9
1 39
38
37
36
35
34
33
32
10 31
11 30
12 29
13 28
14 27
15
16 17 18 19 20 21 22 23 24 25 26
• Low cost - eliminate need external components.
• Phantom key detects.
Chip Topography
• RC oscillator (1.8432MHz ).
• Support scan code set 1, 2 and 3.
• Support PC AT and PS/2 keyboard.
• Low power CMOS device technology.
• Internal pull-up resistor.
• Tri-state outputs for easy board application.
• Built-in 4K ROM.
• Support WINDOWSTM 95, 98, 2000 keys.
• 104/107 keys with multi-media or other special application
keyboard encoder.
• WINDOWS is registered trademarks of Microsoft corperation.
APPLICATION
• IBM PC AT or compatible machine
keyboard.
• IBM PS/2 model 30,50,60,80 or
compatible machine keyboard.
• Japanese keyboard.
• Korean keyboard.
• Brazilian keyboard.
• European keyboard.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.11.8.
1



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Semiconductors
PIN CONFIGURATION
SC83053
432
P90 5
1 39 38
37 P70
P91 6
36 P71
P92 7
35 P72
P93 8
34 P67
P94 9
P95 10
SC83053
33 P66
32 P65
P50 11
31 P64
P51 12
30 P63
P52 13
29 P62
P53 14
28 P61
P54 15
27 P60
16 17 18 19 20 21 22 23 24 25 26
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
Characteristic
Symbol
Supply Voltage
VCC
Input Voltage
VIN
Output Voltage
VOUT
Temperature under Bias
TB
Storage Temperature
TS
Value
-0.5~+7
-0.3~+6
-0.3~+6
0~70
-65~150
Unit
V
V
V
°C
°C
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.11.8.
2



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Semiconductors
DC ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Test condition
Operating Voltage
VCC
Operating Supply Current
ICC1 FOSC=1.8432MHz
Input Leakage
IIN VIN=VCC, VSS
Input High Voltage
VIH
Input Low Voltage
VIL
Output Low Voltage
VOL1 IOL1=3.0mA
Output Low Voltage for LEDS
VOL2 IOL2=10mA
Internal Pull-high Resistance (port 6,9) RPH1 VPH1=0V
Internal Pull-high Resistance for
RPH2 VPH2=0V
DATA, CLK
Output Low Voltage for DATA CLK
VOL3 IOL3=5mA
SC83053
Min.
4.5
2.0
12
Typ.
5
Max.
5.5
3
±1
0.8
0.4
3.2
23
Unit
V
mA
µA
V
V
V
V
K
1.5 2.2
3 K
0.4 V
AC ELECTRICAL CHARACTERISTICS
Parameter
Time from DATA transition to falling edge of CLK
Time from rising edge of CLK to DATA transition
Duration of CLK inactive
Duration of CLK active
Time to auxiliary device inhibit after clock 11 to ensure the
auxiliary device does not start another transmission
Time from inactive to active CLK transition, used to time when
auxiliary device samples DATA
System clock
Symbol
T1
T2
T3
T4
T5
T6
FCLK
Min.
5
5
30
30
Typ.
40
40
Max.
25
T4-5
50
50
Unit
µs
µs
µs
µs
50 µs
5 25 µs
1.8432
MHz
PIN DESCRIPTION
Pin no. Symbol
11 P50
12 P51
I/O
O
O
Function
Column 3 low output scan line, 3-state
Column 4 low output scan line, 3-state
(To be continued)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.11.8.
3



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Semiconductors
SC83053
(Continued)
Pin no.
7-10
13
14
15
16
17
18
19
20
21
22
23
24
25
26
5
6
1
35
36
37
27
28
29
30
31
32
33
34
4
3
38
2
39
40
Symbol
P92-P95
P52
P53
P54
P55
P56
P57
P80
P81
P82
P83
P84
P85
P86
P87
P90
P91
GND
SCROLL
NUM
CAPS
P60
P61
P62
P63
P64
P65
P66
P67
CLK
DATA
VDD
OSCO
R_OSCI
NC
I/O Function
O Low output scan line, 3-state
O Column 5 low output scan line, 3-state
O Column 6 low output scan line, 3-state
O Column 7 low output scan line, 3-state
O Column 14 low output scan line, 3-state
O Column 13 low output scan line, 3-state
O Column 12 low output scan line, 3-state
O Column 11 low output scan line, 3-state
O Column 15 low output scan line, 3-state
O Column 10 low output scan line, 3-state
O Column 8 low output scan line, 3-state
O Column 9 low output scan line, 3-state
O Column 0 low output scan line, 3-state
O Column 16 low output scan line, 3-state
O Column 17 low output scan line, 3-state
O Column 1 low output scan line, 3-state
O Column 2 low output scan line, 3-state
I Ground
O Scroll lock indicator
O NUM lock indicator
O Caps lock indicator
I Row 0 input scan line, internal pull high (17K)
I Row 1 input scan line, internal pull high (17K)
I Row 2 input scan line, internal pull high (17K)
I Row 3 input scan line, internal pull high (17K)
I Row 4 input scan line, internal pull high (17K)
I Row 5 input scan line, internal pull high (17K)
I Row 6 input scan line, internal pull high (17K)
I Row 7 input scan line, internal pull high (17K)
I/O CLOCK line for IBM communication, internal pull high (2.2K)
I/O DATA line for IBM communication, internal pull high (2.2K)
I +5V power supply
O CLOCK output
I Connect 51Kresistor for 1.8432MHz oscillation.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.11.8.
4



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SC83053 KEYBOARD ENCODER SC83053
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