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AT89S2051-24SC Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT89S2051-24SC Datasheet(HTML) 1 Page - ATMEL Corporation |
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1 / 45 page  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) 1. 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. 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, four- level interrupt architecture, a full duplex enhanced serial port, a precision analog comparator, on-chip and clock circuitry. Hardware support for PWM with 8-bit resolu- tion and 8-bit prescaler is available by reconfiguring the two on-chip timer/counters. In addition, the AT89S2051/S4051 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 disabling all other chip functions until the next external interrupt or hardware reset. 8-bit Microcontroller with 2K/4K Bytes Flash AT89S2051 AT89S4051 Preliminary 3390C–MICRO–7/05 |
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