AT89C4051 Datasheet | Atmel

Features - patible with MCS®51 Products - 4K 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 - Brown-out Detection - Power-On Reset (POR) - Green (Pb/Halide-free/Ro HS pliant) Packaging 1. Description The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of Flash programmable and erasable read-only memory. 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 AT89C4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89C4051 provides the following standard features : 4K 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 AT89C4051 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. 8-bit Microcontroller with 4K Bytes Flash 1001F- MICRO- 6/08 2. Pin Configuration 2.1 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...