Atmel AT89C52 User Manual

8-Bit
Microcontroller
with 8 Kbytes
Flash
AT89C52
Features
•
Compatible with MCS-51
TM
Products
•
8 Kbytes of In-System Reprogrammable Flash Memory
Endurance: 1,000 Write/Erase Cycles
•
Fully Static Operation: 0 Hz to 24 MHz
•
Three-Level Program Memory Lock
•
256 x 8-Bit Internal RAM
•
32 Programmable I/O Lines
•
Three 16-Bit Timer/Counters
•
Eight Interrupt Sources
•
Programmable Serial Channel
•
Low Power Idle and Power Down Modes
(T2) P1.0 V CC
(T2 EX) P1.1
P0.0 (AD0)
P1.2
(INT0) P3.2
ALE/PROG
(RD) P3.7 P2.3 (A11)
(TXD) P3.1
EA/VPP
(WR) P3.6
P2.4 (A12)
(RXD) P3.0
P0.7 (AD7)
(T1) P3.5
P2.6 (A14)
RST
P0.6 (AD6)
P0.5 (AD5)
P0.4 (AD4)
P0.3 (AD3)
P0.2 (AD2)
P1.3
P0.1 (AD1)
(INT1) P3.3
PSEN
XTAL2 P2.2 (A10)
(T0) P3.4
P2.7 (A15)
XTAL1 P2.1 (A9)
GND P2.0 (A8)
P2.5 (A13)
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
21
22
23
24
25
26
40
39
38
37
36
35
34
33
32
31
30
29
28
27
(SS) P1.4
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
Pin Configurations
PDIP/Cerdip
Description
The AT89C52 is a low-power, high-performance CMOS 8-bit microcomputer with 8
Kbytes of Flash programmable and erasable read only memory (PEROM). The de-
vice is manufactured using Atmel’s high density nonvolatile memory technology and
is compatible with the industry standard 80C51 and 80C52 instruction set and pinout.
The on-chip Flash allows the program memory to be reprogrammed in-system or by
a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU
with Flash on a monolithic chip, the Atmel AT89C52 is a powerful microcomputer
which provides a highly flexible and cost effective solution to many embedded control
applications.
(continued)
23
1
INDEX
CORNER
34
P1.0 (T2) VCC P1.1 (T2 EX)
P1.2
P1.3
NC
42
43
40
41
6
5
4
44
3
2
26
25
28
27
24
18
19
20
21
22
NC
7
8
9
10
11
12
13
14
15
16
17
29
30
39
38
37
36
35
33
32
31
NC
PSEN
XTAL1
GND
XTAL2
GND
P0.0 (AD0)
ALE/PROG
(RD) P3.7
EA/VPP
(WR) P3.6
(RXD) P3.0
P0.7 (AD7)
P2.6 (A14)
P0.6 (AD6)
P0.5 (AD5)
P0.4 (AD4)
P0.3 (AD3)
P0.2 (AD2)
P0.1 (AD1)
(INT0) P3.2
(TXD) P3.1
(T1) P3.5
(INT1) P3.3
(T0) P3.4
P2.7 (A15)
(A11) P2.3
(A12) P2.4
(A10) P2.2
(A9) P2.1
(A8) P2.0
RST
P2.5 (A13)
P1.4
(
SS)
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
PQFP/TQFP
P1.0 (T2)
VCC
P1.1 (T2 EX)
P0.0 (AD0)
P1.2
ALE/PROG
(RD) P3.7
XTAL1
EA/VPP
(WR) P3.6
GND
(RXD) P3.0
P0.7 (AD7)
P2.6 (A14)
P0.6 (AD6)
P0.5 (AD5)
P0.4 (AD4)
P0.3 (AD3)
P0.2 (AD2)
P1.3
P0.1 (AD1)
PSEN
XTAL2
(INT0) P3.2
(TXD) P3.1
(T1) P3.5
(INT1) P3.3
(T0) P3.4
P2.7 (A15)
(A11) P2.3
(A12) P2.4
(A10) P2.2
(A9) P2.1
(A8) P2.0
NC
23
1
RST
INDEX
CORNER
NC
NC
P2.5 (A13)
34
NC
42
43
40
41
6
5
444
3
2
26
25
28
27
18
19
20 24
21
22
7
8
9
10
11
12
13
14
15
16
17 29
30
39
38
37
36
35
33
32
31
P1.4 (
SS)
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
PLCC/LCC
0313E

Atmel AT89C52 Specifications

General

Brand	Atmel
Model	AT89C52
Category	Microcontrollers
Language	English