3-15
PLCC
P1.0
(
T
2)
VCCP1.1
(
T
2
EX)
P0.0
(AD0)
P1.2
ALE
(RD)
P3.7
XT
AL1
EA
(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
XT
AL2
(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
(A
9)
P
2
.1
(A
8)
P
2
.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
P1.5
P1.6
P1.7
Features
• Compatible with MCS-51™ Products
• 8K Bytes of Factory Programmable QuickFlash
™
Memory
• Fully Static Operation: 0 Hz to 20 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 AT80F52 is a low-power, high-performance CMOS 8-bit microcomputer with 8K
bytes of QuickFlash memory. 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 QuickFlash allows custom codes to
be quickly programmed in the factory. By combining a versatile 8-bit CPU with Quick-
Flash on a monolithic chip, the Atmel AT80F52 is a powerful microcomputer which
provides a highly flexible and cost effective solution to many embedded control appli-
cations.
0980A-A–12/97
8-Bit
Microcontroller
with 8K Bytes
QuickFlash
™

Memory
AT80F52
PDIP
(T2) P1.0 VCC
(T2 EX) P1.1 P0.0 (AD0)
P1.2
(INT0) P3.2
ALE
(RD) P3.7 P2.3 (A11)
(TXD) P3.1
EA
(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
P1.4
P1.5
P1.6
P1.7
Pin Configurations
TQFP
23
1
INDEX
CORNER
34
P1.0
(
T
2)
VCCP1.1
(
T
2
EX)
P1.2P1.3 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
XT
AL1
GND
XT
AL2
GND
P0.0
(AD0)
ALE
(RD)
P3.7
EA
(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
(A
9)
P
2
.1
(A
8)
P
2
.0
RST
P2.5 (A13)
P1.4
P1.5
P1.6
P1.7
(continued)