描述 Description

The AT89S8253 is a low-power, high-performance CMOS 8-bit microcontroller with 12K bytes of In-System Programmable (ISP) Flash program memory and 2K bytes of EEPROM data memory. The device is manufactured using Atmel’s high-density non volatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout.

特性 Features

? Compatible with MCS? 51 Products

? 12K Bytes of In-System Programmable (ISP) Flash Program Memory

– SPI Serial Interface for Program Downloading

– Endurance: 10,000 Write/Erase Cycles

? 2K Bytes EEPROM Data Memory

– Endurance: 100,000 Write/Erase Cycles

? 64-byte User Signature Array

? 2.7V to 5.5V Operating Range

? Fully Static Operation: 0 Hz to 24 MHz (in x1 and x2 Modes)

? Three-level Program Memory Lock

? 256 x 8-bit Internal RAM

? 32 Programmable I/O Lines

? Three 16-bit Timer/Counters

? Nine Interrupt Sources

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

? Enhanced SPI (Double Write/ReadBuffered) Serial Interface

? Low-power Idle and Power-down Modes

? Interrupt Recovery from Power-down Mode

? Programmable Watchdog Timer

? Dual Data Pointer

? Power-off Flag

? Flexible ISP Programming (Byte and Page Modes)

– Page Mode: 64 Bytes/Page for Code Memory, 32 Bytes/Page for Data Memory

? Four-level Enhanced Interrupt Controller

? Programmable and Fuseable x2 Clock Option

? Internal Power-on Reset

? 42-pin PDIP Package Option for Reduced EMC Emission

? Green (Pb/Halide-free) Packaging Option