1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/6/15 Sheet of
File: E:\电路城\抢答器(MAX7219)\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
Vin Vout
GND
7805
Volt Reg
30pF
C1
Cap
10uF
C3
Cap Pol1
30pF
C2
Cap
10K
R?
Res2
0.1uF
C5
Cap
100uF
C4
Cap Pol1
0.1uF
C7
Cap
100uF
C6
Cap Pol1
1
2
P1
电源接口
GND
GND
VCC
VCC
S1
SW-PB
LS1
Speaker
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
S7
SW-PB
S8
SW-PB
S9
SW-PB
GND
GND
P10
P11
P12
P13
P14
P15
P16
P17
P10
P11
P12
P13
P14
P15
P16
P17
P17
P17
P30
P31
P32
S10
SW-PB
S11
SW-PB
GND
A
B
C
D
E
F
G
DP
1
2
DS1
A
B
C
D
E
F
G
DP
1
2
DS2
GND
VCC
DIG0
DIG2
DIG3
DIG1
G
B
F
A
C
E
DP
D
DIN
1
DIG0
2
DIG4
3
SEG DP
22
SEG D
23
DOUT
24
GND
4
SEG E
21
DIG6
5
DIG2
6
DIG3
7
ISET
18
V+
19
SEG C
20
DIG7
8
SEG G
17
GND
9
DIG5
10
DIG1
11
SEG A
14
SEG F
15
SEG B
16
LOAD
12
CLK
13
U2
MAX7219
A
B
C
D
E
F
G
DP
A
B
C
D
E
F
G
DP
DIG0
DIG1
DIG2
DIG3