DS2251 Overview
The DS2251T 128k Soft Microcontroller Module is an 8051-patible microcontroller module based on nonvolatile RAM technology. It is designed for systems that need large quantities of nonvolatile memory. Like other members of the Secure Microcontroller family, it provides full patibility with the 8051 instruction set, timers, serial port, and parallel I/O ports.
DS2251 Key Features
- 32K, 64K, or 128K bytes of nonvolatile SRAM for program and/or data storage
- In-system programming via on-chip serial port
- Capable of modifying its own program or data memory in the end system
- Provides separate Byte-wide bus for peripherals
- Performs CRC-16 check of NV RAM memory High-reliability operation
- Maintains all nonvolatile resources for over 10 years in the absence of power
- Power-fail reset
- Early Warning Power-fail Interrupt
- Watchdog Timer
- Lithium backed memory remembers system state