Manual

4-45
Features
•
Compatible with MCS-51™ Products
•
4K Bytes of Reprogrammable Flash Memory
– Endurance: 1,000 Write/Erase Cycles
•
2.7V to 6V Operating Range
•
Fully Static Operation: 0 Hz to 12 MHz
•
Three-Level Program Memory Lock
•
128 x 8-Bit Internal RAM
•
32 Programmable I/O Lines
•
Two 16-Bit Timer/Counters
•
Six Interrupt Sources
•
Programmable Serial Channel
•
Low Power Idle and Power Down Modes
Description
The AT89LV51 is a low-voltage, high-performance CMOS 8-bit microcomputer with
4K bytes of Flash Programmable and Erasable Read Only Memory. The device is
manufactured using Atmel’s high density nonvolatile memory technology and is com-
patible with the industry standard MCS-51™ instruction set and pinout. The on-chip
Flash allows the program memory to be reprogrammed in-system or by a conven-
tional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash
on a monolithic chip, the Atmel AT89LV51 is a powerful microcomputer which pro-
vides a highly flexible and cost effective solution to many embedded control applica-
tions. The AT89LV51 operates at 2.7 volts up to 6.0 volts.
TQFP
23
1
INDEX
CORNER
34
P1.0 VCC P1.1
P1.2
P1.4
P1.3
NC
42
43
40
41
6
5
4
44
3
2
26
25
28
27
24
18
19
20
21
22
P1.7
P1.6
P1.5
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
()P3.7RD
EA/VPP
()P3.6WR
(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)
()P3.2INT0
(TXD) P3.1
(T1) P3.5
()P3.3INT1
(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)
PDIP
P1.0 V CC
P1.1
P0.0 (AD0)
P1.2
()P3.2INT0
ALE/PROG
()P3.7RD P2.3 (A11)
(TXD) P3.1
EA/VPP
()P3.6WR
P2.4 (A12)
(RXD) P3.0
P0.7 (AD7)
(T1) P3.5
P2.6 (A14)
RST
P0.6 (AD6)
P1.7
P0.5 (AD5)
P1.6
P0.4 (AD4)
P1.5
P0.3 (AD3)
P1.4
P0.2 (AD2)
P1.3
P0.1 (AD1)
()P3.3INT1
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
PLCC
P1.0
VCC
P1.1
P0.0 (AD0)
P1.2
ALE/PROG
()P3.7RD
XTAL1
EA/VPP
()P3.6WR
GND
(RXD) P3.0
P0.7 (AD7)
P2.6 (A14)
P0.6 (AD6)
P0.5 (AD5)
P0.4 (AD4)
P0.3 (AD3)
P1.4
P0.2 (AD2)
P1.3
P0.1 (AD1)
PSEN
XTAL2
()P3.2INT0
(TXD) P3.1
(T1) P3.5
()P3.3INT1
(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
P1.7
P1.6
P1.5
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
8-Bit
Microcontroller
with 4K Bytes
Flash
AT89LV51
Pin Configurations
0303D-D–12/97
(continued)