Features
• Compatible with MCS-51™ Products
• 8K Bytes of User Programmable QuickFlash™ Memory
• 2.7V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 16 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
QuickFlash™
Description
The AT87LV52 is a low-voltage, high-performance CMOS 8-bit microcomputer with
8K bytes of QuickFlash one-time programmable (OTP) read only memory. The device
is manufactured using Atmel’s high-density nonvolatile memory technology and is
compatible with the industry standard MCS-51™ instruction set and pinout. The on-
chip QuickFlash allows the program memory to be user programmed by a conven-
tional nonvolatile memory programmer. By combining a versatile 8-bit CPU with
QuickFlash on a monolithic chip, the Atmel AT87LV52 is a powerful microcomputer
which provides a highly flexible and cost effective solution to many embedded control
AT87LV52
applications.
(continued)
Preliminary
Pin Configurations
TQFP
P1.5
P1.6
1
2
3
4
5
6
7
8
9
33 P0.4 (AD4)
32 P0.5 (AD5)
31 P0.6 (AD6)
30 P0.7 (AD7)
29 EAVPP
P1.7
RST
PDIP
(RXD) P3.0
NC
28 NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
27 ALE/PROG
26 PSEN
(T2) P1.0
(T2 EX) P1.1
P1.2
1
2
3
4
5
6
7
8
9
40 VCC
25 P2.7 (A15)
24 P2.6 (A14)
23 P2.5 (A13)
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
(T0) P3.4 10
(T1) P3.5 11
P1.3
P1.4
P1.5
P1.6
P1.7
RST
(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
XTAL2 18
30 ALE/PROG
29 PSEN
PLCC
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)
XTAL1 19
P1.5
P1.6
P1.7
7
39 P0.4 (AD4)
38 P0.5 (AD5)
37 P0.6 (AD6)
36 P0.7 (AD7)
35 EA/VPP
GND 20
8
9
RST 10
(RXD) P3.0 11
NC 12
34 NC
(TXD) P3.1 13
(INT0) P3.2 14
(INT1) P3.3 15
(T0) P3.4 16
(T1) P3.5 17
33 ALE/PROG
32 PSEN
31 P2.7 (A15)
30 P2.6 (A14)
29 P2.5 (A13)
Rev. 1437A–07/99
1