AT89S8253-24AU TQFP-44 8-bit MCU flash 12k

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 Atmels high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51
instruction set and pinout. The on-chip downloadable Flash allows the program memory to be reprogrammed in-system through an SPI serial interface or by a
conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU
with downloadable Flash on a monolithic chip, the Atmel AT89S8253 is a powerful
microcontroller which provides a highly-flexible and cost-effective solution to many
embedded control applications.

Features

* Compatible with MCS®-51 Products
* 12K Bytes of In-System Programmable (ISP) Flash Program Memory
* 2K Bytes EEPROM Data Memory
* 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/Read Buffered) Serial Interface
* Low-power Idle and Power-down Modes
* Interrupt Recovery from Power-down Mode
* Programmable Watchdog Timer
* Four-level Enhanced Interrupt Controller
* Programmable and Fuseable x2 Clock Option
* Temperature Range: Industrial (-40° to +85°C)