Overview

The AT89S8253 is an MCS-51/8051-compatible microcontroller with 12K bytes of Flash program memory, 256 bytes of SRAM and 2K bytes of EEPROM data memory, 32 I/O pins, three 16-bit timer/counters, SPI serial interface and USART.

Features

• Compatible with MCS-51 microcontrollers.
• Fully static operation, 0Hz to 24MHz.
• 12K bytes of Flash program memory.
• 256 bytes of SRAM data memory.
• 2K bytes of EEPROM data memory.
• Up to 64K bytes optional external memory space.
• 32 I/O pins with individual direction control.
• Three 16-bit timer/counters.
• Enhanced SPI serial interface (double write/read buffered).
• Enhanced UART serial port with framing error detection and automatic address recognition.
• Nine interrupt sources.
• Four-level enhanced interrupt controller.
• Low-power idle and power-down modes.
• Interrupt recovery from power-down mode.
• Programmable watchdog timer.
• Flexible ISP programming (byte and page modes).
• 5V operation.
• Operating temperature range of-40°C to +85°C.
• 40-pin DIP package.