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AT89C52的详细信息
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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
8-Bit
Microcontroller
with 8K Bytes
Flash
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
AT89C52
applications.
(continued)
PDIP
Pin Configurations
( T 2 ) P 1 . 0
( T 2 E X ) P 1 . 1
P 1 . 2
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
V C C
1
2
3
4
5
6
7
P 0 . 0 ( A D 0 )
P 0 . 1 ( A D 1 )
P 0 . 2 ( A D 2 )
P 0 . 3 ( A D 3 )
P 0 . 4 ( A D 4 )
P 0 . 5 ( A D 5 )
P 0 . 6 ( A D 6 )
P 0 . 7 ( A D 7 )
E A / V P P
P 1 . 3
P 1 . 4
P 1 . 5
P 1 . 6
P 1 . 7
R S T
8
9
PQFP/TQFP
( R X D ) P 3 . 0
( T X D ) P 3 . 1
( I N T 0 ) P 3 . 2
( I N T 1 ) P 3 . 3
( T 0 ) P 3 . 4
( T 1 ) P 3 . 5
( W R ) P 3 . 6
( R D ) P 3 . 7
X TA L 2
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
A L E / P R O G
P S E N
P 2 . 7 ( A 1 5 )
P 2 . 6 ( A 1 4 )
P 2 . 5 ( A 1 3 )
P 2 . 4 ( A 1 2 )
P 2 . 3 ( A 1 1 )
P 2 . 2 ( A 1 0 )
P 2 . 1 ( A 9 )
P 2 . 0 ( A 8 )
I N D E X
C O R N E R
4 4 4 2 4 0 3 8 3 6 3 4
4 3 4 1 3 9 3 7 3 5
X TA L 1
G N D
P 0 . 4 ( A D 4 )
P 0 . 5 ( A D 5 )
P 0 . 6 ( A D 6 )
P 0 . 7 ( A D 7 )
1
2
3
4
5
6
7
8
9
3 3
3 2
3 1
3 0
2 9
P 1 . 5
P 1 . 6
P 1 . 7
R S T
( R X D ) P 3 . 0
N C
( T X D ) P 3 . 1
( I N T 0 ) P 3 . 2
( I N T 1 ) P 3 . 3
( T 0 ) P 3 . 4
( T 1 ) P 3 . 5
E A / V P P
N C
A L E / P R O G
P S E N
P 2 . 7 ( A 1 5 )
P 2 . 6 ( A 1 4 )
P 2 . 5 ( A 1 3 )
2 8
2 7
2 6
2 5
2 4
2 3
68PLCC
1 0
1 1
I N D E X
C O R N E R
1 9
1 8 2 0 2 2
1 3 1 5 1 7
2 1
1 6
1 2 1 4
6
4
2
4 4 4 2 4 0
1 4 3 4 1
5
3
P 1 . 5
7
P 0 . 4 ( A D 4 )
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
P 1 . 6
P 1 . 7
8
9
P 0 . 5 ( A D 5 )
P 0 . 6 ( A D 6 )
P 0 . 7 ( A D 7 )
E A / V P P
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
R S T
( R X D ) P 3 . 0
N C
( T X D ) P 3 . 1
( I N T 0 ) P 3 . 2
( I N T 1 ) P 3 . 3
( T 0 ) P 3 . 4
N C
A L E / P R O G
P S E N
P 2 . 7 ( A 1 5 )
P 2 . 6 ( A 1 4 )
P 2 . 5 ( A 1 3 )
( T 1 ) P 3 . 5
1 9 2 1 2 3 2 5 2 7
2 8
1 8 2 0 2 2 2 4 2 6
0313F-A–12/97
4-61
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