AT89C52 Datasheet, PDF (1/22 Pages) ATMEL Corporation – 8-Bit Microcontroller with 8K Bytes Flash

Features
• Compatible with MCS-51™ Products
• 8K Bytes 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
Description
The AT89C52 is a low-power, high-performance CMOS 8-bit microcomputer with 8K
bytes of Flash programmable and erasable read only memory (PEROM). The device
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)
Pin Configurations
PDIP
PQFP/TQFP
INDEX
CORNER
P1.5
P1.6
P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
4 44 ₃₄ 24 ₁₄ 03 ₉3 83 ₇3 63 ₅₃ 4
1
33
2
32
3
31
4
30
5
29
6
28
7
27
8
26
9
25
10
24
11
23
1
21
31
41
51
61
71
1
8
9
2
0
2
12
2
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
(T2) P1.0 1
(T2 EX) P1.1 2
P1.2 3
P1.3 4
P1.4 5
P1.5 6
P1.6 7
P1.7 8
RST 9
(RXD) P3.0 10
(TXD) P3.1 11
(INT0) P3.2 12
(INT1) P3.3 13
(T0) P3.4 14
(T1) P3.5 15
(WR) P3.6 16
(RD) P3.7 17
X TA L 2 1 8
X TA L 1 1 9
GND 20
40 VCC
39 P0.0 (AD0)
38 P0.1 (AD1)
37 P0.2 (AD2)
36 P0.3 (AD3)
35 P0.4 (AD4)
34 P0.5 (AD5)
33 P0.6 (AD6)
32 P0.7 (AD7)
31 EA/VPP
30 ALE/PROG
29 PSEN
28 P2.7 (A15)
27 P2.6 (A14)
26 P2.5 (A13)
25 P2.4 (A12)
24 P2.3 (A11)
23 P2.2 (A10)
22 P2.1 (A9)
21 P2.0 (A8)
68PLCC
INDEX
CORNER
8-Bit
Microcontroller
with 8K Bytes
Flash
AT89C52
(RXD)
(TXD)
(INT0)
(INT1)
(T0)
(T1)
P1.5
P1.6
P1.7
RST
P3.0
NC
P3.1
P3.2
P3.3
P3.4
P3.5
6 4 2 44 42 40
75 ³
1 4 3 4 13 ₉
8
38
9
37
10
36
11
35
12
34
13
33
14
32
15
31
16
30
11781 _{92 02 12 22 32 42 52 62 72289}
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
0313F-A–12/97
4-61