51单片机开发板原理图

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51单片机开发板原理图DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
Q8
9012
Q9
9012
R38
1K
R39
1K
5
LEDS2 LEDS3 LEDS4 LEDS5
Y5
10
A1
2
A0
1
E2
5
Y2
13
E1
4
Y4
11
GND
8
Y6
9
Y3
12
E3
6
Y1
14
Y0
15
A2
3
Y7
7
VCC
16
U3 74HC138
LEDS0
LEDS1
LEDS2
LEDS3
LEDS4
LEDS5
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
Q7
9012
R37
1K
LEDS6
Y5
10
A1
2
A0
1
E2
5
Y2
13
E1
4
Y4
11
GND
8
Y6
9
Y3
12
E3
6
Y1
14
Y0
15
A2
3
Y7
7
VCC
16
U4 74HC138
LEDC0
LEDC1
LEDC2
LEDC3
LEDC4
LEDC5
5
C22
0.1uF
LEDC6
LEDC7
5
C23
0.1uF
ADDR3
R4
1K
R4
1K
R4
1K
R4
1K
R4
1K
R4
1K
R5
1K
R5
1K
LEDC0
LEDC1
LEDC2
LEDC3
LEDC4
LEDC5
LEDC6
LEDC7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB0
DB1
DB2
DB3
DB5
DB6
DB7
DB4
DIR
1
A1
2
B2
17
A3
4
B4
15
A5
6
B6
13
A7
8
B8
11
GND
10
A8
9
B7
12
A6
7
B5
14
A4
5
B3
16
A2
3
B1
18
OE
19
VCC
20
U2 74HC245
C20
0.1uF
5
5
5
a
b f
c
g
d
e
10
9
8
5
4
2
3
a
b
c
d
e
f
g
7
dp
dp
1
6
com com
DS4LED-7SEG
a
b f
c
g
d
e
10
9
8
5
4
2
3
a
b
c
d
e
f
g
7
dp
dp
1
6
com com
DS5LED-7SEG
a
b f
c
g
d
e
10
9
8
5
4
2
3
a
b
c
d
e
f
g
7
dp
dp
1
6
com com
DS6LED-7SEG
ENLED1
ENLED1
R18 330
R19 330
R20 330
R21 330
R22 330
R23 330
R24 330
R25 330
R10 4.7K
R11 4.7K
R12 4.7K
R13 4.7K
R14 4.7K
R15 4.7K
R16 4.7K
R17 4.7K
R27 4.7K
R28 4.7K
R29 4.7K
R30 4.7K
LED显示、及其驱动电路
GND
4
SDA
SCL
VCC
8
U7
C24
5
ENLCD
MC0 MC1 MC2 MC3
ADDR0 ADDR1 ADDR2 ADDR3
P1.0 P1.1 P1.2 P1.3
显示译码与步进电机的选择接口跳线帽
ENLCD1
ENLCD2
R72 15K
R68
10K
5
C3
0.1uF
C4
0.1uF
C5
0.1uF
C6
0.1uF
5IN
1 2
3 4
5 6
J2
UART
UART-TX UART-RX
RXD TXD
USB-RX USB-TX
USB电源去耦及UART切换电路
RS232串口电路
P1.0/T2
1
P1.1/T2EX
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/A8
21
P2.1/A9
22
P2.2/A10
23
P2.3/A11
24
P2.4/A12
25
P2.5/A13
26
P2.6/A14
27
P2.7/A15
28
PSEN
29
ALE
30
EA
31
P0.7/AD7
32
P0.6/AD6
33
P0.5/AD5
34
P0.4/AD4
35
P0.3/AD3
36
P0.2/AD2
37
P0.1/AD1
38
P0.0/AD0
39
VCC
40
U5
STC89C52
Y2
11.0592MHz
C14 20p
C15 20p
5
C21
0.1uF
RST
5
DB0
DB1
DB2
DB3
DB5
DB6
DB7
DB4
KeyOut1
KeyOut2
KeyOut3
KeyOut4
KeyIn1
KeyIn2
KeyIn3
KeyIn4
P1.0
P1.1
P1.2
P1.3
TXD
RXD
SCL
SDA
ENLED1
SCK
SIO
S1302
BUZZ
1ware
IRD
ENLCD
单片机电路
1
2
3
4
5
6
7
8
J4 CON8
1
2
3
4
5
6
7
8
J5 CON8
1
2
3
4
5
6
7
8
J6 CON8
1
2
3
4
5
6
7
8
J7 CON8
K1
KEY
K5
KEY
K9
KEY
K13
KEY
K2
KEY
K6
KEY
K10
KEY
K14
KEY
K3
KEY
K7
KEY
K11
KEY
K15
KEY
K4
KEY
K8
KEY
K12
KEY
K16
KEY
KeyOut1
KeyOut2
KeyOut3
KeyOut4
KeyIn1
KeyIn2
KeyIn3
KeyIn4
5
R1 4.7K
R2 4.7K
R3 4.7K
R4 4.7K
矩阵按键电路
TXD
1
DTRN
2
RTSN
3
VDD232
4
RXD
5
RIN
6
GND
7
VDD
8
DSRN
9
DCDN
10
CTSN
11
SHTDN
12
EECLK
13
EEDATA
14
DP
15
DM
16
VDD3V3
17
GND3V3
18
RESET
19
VDD
20
GND
21
TRIMODE
22
LDMODE
23
VDDPLL
24
GNDPLL
25
PLLTEST
26
OSC1
27
OSC2
28
U1 PL2303
USB-RX
USB-TX
R5 4.7K
R26 4.7K R57 18
R58 18
DM
DP
R33 1K
C2
0.1uF
R8 4.7K
R9 4.7K
Y1
12MHz
C12 20p
C13 20p
DP
5IN
5IN
5IN
5IN
5IN
5IN
USB－UART转换电路
D5
4148
VCC
1
D-
2
S
5
D
3
S
6
GND
4
J3
USB-B
DP
DM
5IN
LED1
LED
R34
1K

C16
100u
USB接口电路
K17
RESET
R31
4.7K
C11
0.1uF
5
RST R60
18
C10
0.1uF
LED10
LED
R35
1K
5

C19
100u
5IN
单片机复位电路
USB供电电路
1 2
F1
FUSE
虾头Ⅰ代
C1
1
V
2
C1-
3
C2
4
C2-
5
V-
6
T2OUT
7
R2IN
8
R2OUT
9
T2IN
10
T1IN
11
R1OUT
12
R1IN
13
T1OUT
14
GND
15
VCC
16
U11 MAX232
1
6
2
7
3
8
4
9
5
J1
RS-232
PC-RX
PC-TX
C1 0.1uF
C27
0.1uF
C33
0.1uF
C7
0.1uF
C32
0.1uF
UART-TX
UART-RX
5
J13
P1.0
J14
P1.1
J15
P1.2
J16
P1.3
J8
LCDCS
ADDR0
ADDR1
ADDR2
1
3
2
J10A
PWR
4
6
5
J10B
PWR
R32 330