89S51 Microcontroller Datasheet

89S51 Datasheet, PDF, Equivalent


Part Number

89S51

Description

8-bit Microcontroller

Manufacture

ATMEL Corporation

Total Page 30 Pages
Datasheet
Download 89S51 Datasheet


89S51
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Features
Compatible with MCS®-51 Products
4K Bytes of In-System Programmable (ISP) Flash Memory
– Endurance: 1000 Write/Erase Cycles
4.0V to 5.5V Operating Range
Fully Static Operation: 0 Hz to 33 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
Full Duplex UART Serial Channel
Low-power Idle and Power-down Modes
Interrupt Recovery from Power-down Mode
Watchdog Timer
Dual Data Pointer
Power-off Flag
Fast Programming Time
Flexible ISP Programming (Byte and Page Mode)
Green (Pb/Halide-free) Packaging Option
1. Description
The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K
bytes of In-System Programmable Flash memory. The device is manufactured using
Atmel’s high-density nonvolatile memory technology and is compatible with the indus-
try-standard 80C51 instruction set and pinout. The on-chip Flash allows the program
memory to be reprogrammed in-system or by a conventional nonvolatile memory pro-
grammer. By combining a versatile 8-bit CPU with In-System Programmable Flash on
a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a
highly-flexible and cost-effective solution to many embedded control applications.
The AT89S51 provides the following standard features: 4K bytes of Flash, 128 bytes
of RAM, 32 I/O lines, Watchdog timer, two data pointers, two 16-bit timer/counters, a
five-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator,
and clock circuitry. In addition, the AT89S51 is designed with static logic for operation
down to zero frequency and supports two software selectable power saving modes.
The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and
interrupt system to continue functioning. The Power-down mode saves the RAM con-
tents but freezes the oscillator, disabling all other chip functions until the next external
interrupt or hardware reset.
8-bit
Microcontroller
with 4K Bytes
In-System
Programmable
Flash
AT89S51
2487C–MICRO–03/05

89S51
www.DataSheet4U.com
2. Pin Configurations
2.1
40-lead PDIP
P1.0
P1.1
P1.2
P1.3
P1.4
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
XTAL2
XTAL1
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 VCC
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
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)
2.2 44-lead TQFP
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
1
2
3
4
5
6
7
8
9
10
11
33 P0.4 (AD4)
32 P0.5 (AD5)
31 P0.6 (AD6)
30 P0.7 (AD7)
29 EA/VPP
28 NC
27 ALE/PROG
26 PSEN
25 P2.7 (A15)
24 P2.6 (A14)
23 P2.5 (A13)
2.3 44-lead PLCC
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
7
8
9
10
11
12
13
14
15
16
17
39 P0.4 (AD4)
38 P0.5 (AD5)
37 P0.6 (AD6)
36 P0.7 (AD7)
35 EA/VPP
34 NC
33 ALE/PROG
32 PSEN
31 P2.7 (A15)
30 P2.6 (A14)
29 P2.5 (A13)
2.4 42-lead PDIP
RST
(RXD) P3.0
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
XTAL2
XTAL1
GND
PWRGND
(A8) P2.0
(A9) P2.1
(A10) P2.2
(A11) P2.3
(A12) P2.4
(A13) P2.5
(A14) P2.6
(A15) P2.7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42 P1.7 (SCK)
41 P1.6 (MISO)
40 P1.5 (MOSI)
39 P1.4
38 P1.3
37 P1.2
36 P1.1
35 P1.0
34 VDD
33 PWRVDD
32 P0.0 (AD0)
31 P0.1 (AD1)
30 P0.2 (AD2)
29 P0.3 (AD3)
28 P0.4 (AD4)
27 P0.5 (AD5)
26 P0.6 (AD6)
25 P0.7 (AD7)
24 EA/VPP
23 ALE/PROG
22 PSEN
2 AT89S51
2487C–MICRO–03/05


Features www.DataSheet4U.com Features • Compat ible with MCS®-51 Products • 4K Byte s of In-System Programmable (ISP) Flash Memory • • • • • • • • • • • • • • • • – En durance: 1000 Write/Erase Cycles 4.0V t o 5.5V Operating Range Fully Static Ope ration: 0 Hz to 33 MHz Three-level Prog ram Memory Lock 128 x 8-bit Internal RA M 32 Programmable I/O Lines Two 16-bit Timer/Counters Six Interrupt Sources Fu ll Duplex UART Serial Channel Low-power Idle and Power-down Modes Interrupt Re covery from Power-down Mode Watchdog Ti mer Dual Data Pointer Power-off Flag Fa st Programming Time Flexible ISP Progra mming (Byte and Page Mode) Green (Pb/Ha lide-free) Packaging Option 8-bit Micr ocontroller with 4K Bytes In-System Pro grammable Flash AT89S51 1. Description The AT89S51 is a low-power, high-perfo rmance CMOS 8-bit microcontroller with 4K bytes of In-System Programmable Flas h memory. The device is manufactured us ing Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80.
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