MICRO
CONTROLADORES
®
MCS-51
RICARDO ZELENOVSKY
*RD
MEMORIAS
AO..A15
*RD
*WR
*PSEN
BOOT
*BOOT
AD0..AD7
*RD
RST
P1.7
GRAVADOR
A0..A15
*RD
*WR
RST
P1.7
P1.6
AD0..AD7
VCC
R2
47K
D11N4148
R1
82
SW1
SW PUSHBUTTON
C1
10u
1 2
U5A
74LS14
P1.6 *WR *WR
*PSEN
BOOT
*BOOT
A0
A1
A2
AD0
AD1
AD2
D0
3 Q0 2
D1
4 Q1 5
D2
7 Q2 6
D3
8 Q3 9
D4
13 Q4 12
D5
14 Q5 15
D6
17 Q6 16
D7
18 Q7 19
OC
1
G
11
U2
74LS373
AD0
AD1
AD2
EA/VP
31
X1
19
X2
18
RESET
9
INT0
12
INT1
13
T0
14
T1
15
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
P0.0 39
P0.1 38
P0.2 37
P0.3 36
P0.4 35
P0.5 34
P0.6 33
P0.7 32
P2.0 21
P2.1 22
P2.2 23
P2.3 24
P2.4 25
P2.5 26
P2.6 27
P2.7 28
RD 17
WR 16
PSEN 29
ALE/P 30
TXD 11
RXD 10
U1
8031
C3
30p
RST
C2
30p
X1
3575611Hz
*RST
11 10 U5E
74LS14
VCC
LED6
Q_AM
R9
220
VCC
R4
220
R5
220
LED3
R_AM
LED2
R_VM
P1.0
3 4 U5B 74LS14
5 6 U5C 74LS14
RST
BOOT RST
AD3
AD4
AD5
AD6
AD7
A8
A9
AD3
AD4
AD5
AD6
AD7
ALE
A3
A4
A5
A6
A7
VCC
TXD
INTERF-SERIAL
TXD
RXD
VCC
25V
A10
A11
A12
A13
A14
A15
*RD
*WR
P1.0
P1.1
P1.2
P1.3
*INT0
*INT1
T0
T1
RAM
X
LED1 (Q_VD)
ON --> BOOT SERIAL
1 ROM
0 RAM
P1.1
P1.2
9 8 U5D 74LS14
R6
220
LED4
R_VD
SW2
SW PUSHBUTTON
SW3
SW PUSHBUTTON
P1.3
*INT1
T1
OFF --> PROG RAM
(BOOT=1)
(BOOT=0)
VCC
R9
2K2
P1.4
P1.5
P1.6
P1.7
LED1
Q_VD
PSEN
TXD
RXD
BOOT
RXD 25V
*BOOT
R3
220
D
2 Q 5
CLK
3
Q 6
P
R
4
C
L
1
U8A
74LS74
C4
1u
LED5
Q_VM
11 10
U5E
74LS14
R7
220
*INT0
VCC
SW4
SW SPST
R8
8K2
FECHADA
ABERTA S STEP
(Q_VM OFF)
(Q_VM ON)
RST
VCC
BOOT
*BOOT
RUN
*PSEN *RD *WR