8-Bit Microcontroller. AT89C2051 Datasheet

AT89C2051 Datasheet PDF, Equivalent


Part Number

AT89C2051

Description

8-Bit Microcontroller

Manufacture

ATMEL Corporation

Total Page 19 Pages
PDF Download
Download AT89C2051 Datasheet PDF


AT89C2051 Datasheet
Features
Compatible with MCS®-51Products
2K Bytes of Reprogrammable Flash Memory
– Endurance: 10,000 Write/Erase Cycles
2.7V to 6V Operating Range
Fully Static Operation: 0 Hz to 24 MHz
Two-level Program Memory Lock
128 x 8-bit Internal RAM
15 Programmable I/O Lines
Two 16-bit Timer/Counters
Six Interrupt Sources
Programmable Serial UART Channel
Direct LED Drive Outputs
On-chip Analog Comparator
Low-power Idle and Power-down Modes
Green (Pb/Halide-free) Packaging Option
8-bit
Microcontroller
with 2K Bytes
Flash
1. Description
The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with
2K bytes of Flash programmable and erasable read-only memory (PEROM). The
device is manufactured using Atmel’s high-density nonvolatile memory technology
and is compatible with the industry-standard MCS-51 instruction set. By combining a
versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a power-
ful microcomputer which provides a highly-flexible and cost-effective solution to many
embedded control applications.
The AT89C2051 provides the following standard features: 2K bytes of Flash, 128
bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt
architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator
and clock circuitry. In addition, the AT89C2051 is designed with static logic for opera-
tion 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 contents but freezes the oscillator disabling all other chip functions until the next
hardware reset.
AT89C2051
0368H–MICRO–6/08

AT89C2051 Datasheet
2. Pin Configuration
2.1 20-lead PDIP/SOIC
3. Block Diagram
RST/VPP
(RXD) P3.0
(TXD) P3.1
XTAL2
XTAL1
(INT0) P3.2
(INT1) P3.3
(TO) P3.4
(T1) P3.5
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 P1.7
18 P1.6
17 P1.5
16 P1.4
15 P1.3
14 P1.2
13 P1.1 (AIN1)
12 P1.0 (AIN0)
11 P3.7
2 AT89C2051
0368H–MICRO–6/08


Features Datasheet pdf Features • Compatible with MCS®-51Pro ducts • 2K Bytes of Reprogrammable Fl ash Memory – Endurance: 10,000 Write/ Erase Cycles • 2.7V to 6V Operating R ange • Fully Static Operation: 0 Hz t o 24 MHz • Two-level Program Memory L ock • 128 x 8-bit Internal RAM • 15 Programmable I/O Lines • Two 16-bit Timer/Counters • Six Interrupt Source s • Programmable Serial UART Channel • Direct LED Drive Outputs • On-chi p Analog Comparator • Low-power Idle and Power-down Modes • Green (Pb/Hali de-free) Packaging Option 8-bit Microc ontroller with 2K Bytes Flash 1. Descr iption The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomput er with 2K bytes of Flash programmable and erasable read-only memory (PEROM). The device is manufactured using Atmel s high-density nonvolatile memory tec hnology and is compatible with the indu stry-standard MCS-51 instruction set. B y combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a powerful microcomputer which provides a hig.
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