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STC12LE5616AD Datasheet(PDF) 81 Page - STCmicro Technology Co,.Ltd

Part # STC12LE5616AD
Description  Enhanced 8051 Central Processing Unit ,1T per machine cycle, faster 8~12 times than the rate of a standard 8051.
PDF  377 Pages
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Manufacturer  STC [STCmicro Technology Co,.Ltd]
Direct Link  http://www.stcmicro.com/
Logo STC - STCmicro Technology Co,.Ltd

STC12LE5616AD Datasheet(HTML) 81 Page - STCmicro Technology Co,.Ltd

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R6
8.2KΩ
sw6
R5
5.4KΩ
sw5
R4
3.3KΩ
sw4
R3
1.8KΩ
sw3
R2
520Ω
sw2
sw1
R1
10K
Ω
+5V
ADCx
47pF
0
0`0.5
0.5`1
1`1.5
1.5`2.0 2.0`2.5
R1
520Ω
sw2
sw1
R0
10K
Ω
+5V
ADCx
47pF
0
R2
1.2KΩ
sw3
R3
1.6KΩ
sw4
R4
1.8KΩ
sw5
R5
3KΩ
sw6
R6
4KΩ
sw7
R7
6.5Ω
sw8
R8
10KΩ
sw9
R9
30KΩ
sw10
R10
100KΩ
sw11
4.11 Using A/D Conversion to scan key application circuit
This circuit can achieve a signle key
or combin key scan, resistance need to
configure the actual needs
This circuit use 10 keys spaced partial pressure, for each key, range
of allowed error is +/-0.25V, it can effectively avoid failure of key
detection because of resistance or temperature drift. If the requested
key detection more stable and reliable, can reduce the number of
buttons, to relax the voltage range of each key
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Vcc
P2.1
P2.7
P1.7/ADC7
P1.5/ADC5
P1.4/ADC4
P1.3/ADC3
Gnd
P1.1/ADC1/CLKOUT1
P1.0/ADC0/CLKOUT0
P1.2/ADC2
P2.2
RST
P2.5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
P1.6/ADC6
P2.4
P2.0
P3.7/PCA0/PWM0
RxD/P3.0
TxD/P3.1
XTAL2
XTAL1
INT0/P3.2
INT1/P3.3
PWM1/PCA1/T1/P3.5
ECI/T0/P3.4
P2.3
P2.6
81



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