AT89C4051 datasheet pdf

Features •Compatible 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 Comparator •Low-power Idle and Power-down Modes •Brown-out Detection •Power-On Reset (POR) •Green (Pb/Halide-free/RoHS Compliant) 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 man- ufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versa- tile 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 inter- rupt architecture, a full duplex serial port, a precision analog comparator, 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 AT 8 9 C 4 0 5 1 1001F–MICRO–6/08

Features

• •Compatible with MCS
• •4K Bytes of Reprogrammable Flash Memory
• •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
• •Brown-out Detection
• •Power-On Reset (POR)
• •Green (Pb/Halide-free/RoHS Compliant) Packaging
• 1. Description