![](https://csdnimg.cn/release/download_crawler_static/88751165/bg1.jpg)
1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/9/14 Sheet of
File: I:\办公2021下\收银机9.9\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
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
P27
P26
P25
P24
P23
P22
P21
P20
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
P00
P01
P02
SH_CP
11
DS
14
ST_CP
12
MR
10
OE
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
Q7‘
9
U2
74595
A
B
C
D
E
F
G
DP
1
2
3
4
DS1
VCC
GND
SH_CP
11
DS
14
ST_CP
12
MR
10
OE
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
Q7‘
9
U3
74595
VCC
GND
D0
D1
D2
D3
D4
D5
D6
D7
S0
S1
S2
S3
S4
S5
S6
S7
A
B
C
D
E
F
G
DP
1
2
3
4
DS2
P00
P01
P02
P00
P01
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
S0
S1
S2
S3
S4
S5
S6
S7
Q1
PNP
LS1
Speaker
VCC
GND
10K
R3
Res2
P37
P37
S18
SW-PB
GND
P36
P36