AT89S2051 Datasheet | Atmel

Features - patible 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 (x1 and x2 Modes) - 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 parator 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) 8-bit Microcontroller with 2K/4K Bytes Flash AT89S2051 AT89S4051 1. Description The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcontroller 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 patible with the industry-standard MCS-51 instruction set. By bining 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 patible with the AT89C2051/C4051 devices, respectively. The AT89S2051/S4051 provides the following standard features : 2K/4K bytes of Flash, 256 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a six-vector, fourlevel interrupt architecture, a full duplex enhanced serial port, a precision analog parator, on-chip and clock...