Overview
The VRS51L3174 is a high performance, 8051-based microcontroller coupled with a fully integrated array of peripherals for addressing a broad range of embedded design applications.
Based on a powerful 40-MIPS, single-cycle, 8051 microprocessor, the VRS51L3174’s memory sub-system features 64KB of Flash and 4352 bytes of SRAM and 8192 bytes of nonvolatile FRAM (ferroelectric random access memory) memory.

FEATURE Set
o 8051 High Performance Single Cycle Processor
   (Operation up to 40 MIPS)
o 64KB Flash Program Memory
   (In-System/ln-Application Programmable)
o 4352 Bytes of SRAM (4KB + 256)
   (Ext. 4KB can be used for program or data memory)
o 8192 Bytes of on-chip FRAM memory
o JTAG Interface for Flash Programming and Non-Intrusive
   Debugging/In-Circuit Emulation
o MULT/DIV/ACCU Unit including Barrel Shifter
o 40 General Purpose I/Os
o 2 Serial UARTs/2 Baud Rate Generators (20-bit resolution)
o Enhanced SPI Interface (fully configurable word size)
o Fully Configurable I2C Interface (Master/Slave)
o 16 External Interrupt Pins/Interrupt On Port Pin Change
o 16-bit General Purpose Timer/Counters
o 2 Pulse Width Counter Modules
o 8 PWM Controller Outputs with Individual Timers
o PWMs can be used as General Purpose Timers
o Internal Oscillator
o Dynamic System Clock Frequency Adjustment
o Power Saving Features
o Power-On Reset/Brown-Out Detect
o Watchdog Timer
o Operating voltage: 3.0V to 3.6V
o Operating Temperature -40°C to +85°C