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2.7-Volt, 80C31 Microcontroller with 2K Bytes In-System Programmable Flash, 20-pin Package.
- 2K version: AT89S2051
- 4K version: AT89S4051
AT89S2051 概述
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 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, fourlevel interrupt architecture, a full duplex enhanced serial port, a precision analog comparator, on-chip and clock circuitry. Hardware support for PWM with 8-bit resolution 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.
The on-board Flash program memory is accessible through the ISP serial interface. Holding RST active forces the device into a serial programming interface and allows the program memory to be written to or read from, unless one or more lock bits have been activated.
AT89S2051 特性
- 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 (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 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)
AT89S2051 订购型号
Speed (MHz)) |
电源供应 | 订购型号 | 封装 | 适用范围 |
24 | 2.7V to 5.5V | AT89S2051-24PU AT89S2051-24SU |
20P3 20S2 |
Industrial (-40° C to 85° C |