Features
• Compatible with MCS-51™ Products
• 4K 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
• 128 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Two 16-bit Timer/Counters
8-bit
• Six Interrupt Sources
• Programmable Serial Channel
• Low-power Idle and Power-down Modes
Microcontroller
with 4K Bytes
QuickFlash®
Description
The AT87LV51 is a low-voltage, high-performance CMOS 8-bit microcontroller with
4K 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 AT87LV51 is a powerful microcontroller
that provides a highly flexible and cost-effective solution to many embedded control
AT87LV51
Preliminary
applications.
(continued)
TQFP
Pin Configurations
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
PDIP
RST
(RXD) P3.0
NC
28 NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
27 ALE/PROG
26 PSEN
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RST
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
(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
PLCC
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)
P1.5
P1.6
P1.7
7
8
9
39 P0.4 (AD4)
38 P0.5 (AD5)
37 P0.6 (AD6)
36 P0.7 (AD7)
35 EA/VPP
XTAL1 19
RST 10
(RXD) P3.0 11
NC 12
GND 20
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. 1602A–04/00
1