Description

The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcontrol ler with 2K/4K bytes of In-System Programmable (ISP) Flash program memory. 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 AT89S2051/S4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. Moreover, the AT89S2051/S4051 is designed to be function compatible with the AT89C2051/C4051 devices, respectively.

Features

• Compatible with MCS® 51 Products

• 2K/4K Bytes of In-System Programmable (ISP) Flash Program Memory

– Serial Interface for Program Downloading

– Endurance: 10,000 Write/Erase Cycles

• 2.7V to 5.5V Operating Range

• Fully Static Operation: 0 Hz to 24 MHz

• Two-level Program Memory Lock

• 256 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 with Selectable Interrupt

• 8-bit PWM (Pulse-width Modulation)

• Low Power Idle and Power-down Modes

• Brownout Reset

• Enhanced UART Serial Port with Framing Error Detection and Automatic Address Recognition

• Internal Power-on Reset

• Interrupt Recovery from Power-down Mode

• Programmable and Fuseable x2 Clock Option

• Four-level Enhanced Interrupt Controller

• Power-off Flag

• Flexible Programming (Byte and Page Modes)

– Page Mode: 32 Bytes/Page

• User Serviceable Signature Page (32 Bytes)