1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
Title
Number RevisionSize
A3
Date: 2022/6/19 Sheet of
File: I:\办公2021下\呼叫器11.29\原理图\Sheet1.SchDocDrawn By:
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
RST
9
P3.0/RXD
10
P3.1/TXD
11
P3.2/INT0
12
P3.3/INT1
13
P3.4/T0
14
P3.5/T1
15
P3.6/WR
16
P3.7/RD
17
XTAL2
18
XTAL1
19
GND
20
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
PSEN
29
ALE/PROG
30
EA
31
P0.7
32
P0.6
33
P0.5
34
P0.4
35
P0.3
36
P0.2
37
P0.1
38
P0.0
39
VCC
40
U1
80511 2
Y1
XTAL
30pF
C2
Cap
10uF
C1
Cap Pol1
30pF
C3
Cap
10K
R1
Res2
GND
VCC
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q2
PNP
LS1
Speaker
D5
LED3
VCC
GND
10K
R4
Res2
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
S7
SW-PB
S8
SW-PB
S9
SW-PB
S10
SW-PB
S11
SW-PB
S12
SW-PB
S13
SW-PB
S14
SW-PB
S15
SW-PB
S16
SW-PB
S17
SW-PB
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
P34
P35
P36
P37
P10
P11
P12
P13
P14
P15
P16
P17
Vin Vout
GND
7805
Volt Reg
0.1uF
C5
Cap
100uF
C4
Cap Pol1
0.1uF
C7
Cap
100uF
C6
Cap Pol1
1
2
P1
电源接口
GND
VCC
P16
P00
P01
P02
P03
P04
P05
P06
P07
AB/BA
1
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
GND
10
VCC
20
CE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
U2
74LS245
A
B
C
D
E
F
G
DP
1
2
DS1
VCC
GND
Q3
PNP
VCC
10K
R6
Res2
Q4
PNP
VCC
10K
R3
Res2GND
VCC
P00
P01
P02
P03
P04
P05
P06
P07
A
1
B
2
C
3
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
E1
6
E2
4
E3
5
U3
74138
VCC
D6
LED3
D7
LED3
D8
LED3
D1
LED3
D2
LED3
D3
LED3
D4
LED3
P10
P11
P12
10K
R9
Res2
GND
VCC
10K
R7
Res2
10K
R8
Res2
10K
R10
Res2
10K
R11
Res2
10K
R12
Res2
10K
R13
Res2
10K
R14
Res2
D9
LED3
D10
LED3
D11
LED3
D12
LED3
10K
R15
Res2
10K
R16
Res2
10K
R17
Res2
10K
R18
Res2
P27
P26
P25
P24
P23
P22
P21
P20
P27
P26
P25
P24
P23
P22
P21
P20
P13
P14
P15
P17