Description
The AT89S8252 is a low-power, high-performance CMOS 8-bit microcomputer with 8K bytes of downloadable Flash programmable and erasable read only memory and 2K bytes of EEPROM. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 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 AT89S8252 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

FEATUREs
• Compatible with MCS-51™ Products
• 8K Bytes of In-System Reprogrammable Downloadable Flash Memory
   – SPI Serial Interface for Program Downloading
   – Endurance: 1,000 Write/Erase Cycles
• 2K Bytes EEPROM
   – Endurance: 100,000 Write/Erase Cycles
• 4V to 6V Operating Range
• Fully Static Operation: 0 Hz to 24 MHz
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Nine Interrupt Sources
• Programmable UART Serial Channel
• SPI Serial Interface
• Low-power Idle and Power-down Modes
• Interrupt Recovery From Power-down
• Programmable Watchdog Timer
• Dual Data Pointer
• Power-off Flag