AT89C2051 Datasheet | Atmel

Features - patible 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 parator - 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 microputer 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 patible with the industry-standard MCS-51 instruction set. By bining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a powerful microputer 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 parator, on-chip oscillator and clock circuitry. In addition, the AT89C2051 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 contents but freezes the oscillator disabling all other chip functions until the next hardware reset. 0368H- MICRO- 6/08 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 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...