Overview
The VRS51L3074 is a FRAM-enhanced, 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 VRS51L3074抯 memory sub-system includes 8KB of FRAM (high endurance, nonvolatile RAM), 64KB of Flash and 4352 bytes of SRAM.

Support peripherals include a hardware based arithmetic unit capable of performing complex mathematical operations, a JTAG interface used for FRAM/Flash Programming and non-intrusive in-circuit debugging/emulation, a precision internal oscillator (bai feng zhi2 accuracy) and a watchdog timer.

Communication and control of external devices is facilitated via an assortment of digital peripherals which include an enhanced fully configurable SPI bus, an I2C interface, dual UARTs with dedicated baud rate generators, 8 PWM controllers, 3 16-bit timers and 2 pulse width counter modules.

The VRS51L3074 is powered by a 3.3 volt supply, can function over the industrial temperature range, and is available in a QFP-64 package (see VRS51L3174 for PLCC44 and QFP-44 packages ?pin-compatible with the industry standard 8051 microcontroller footprint).


Features
?8051 High Performance Single Cycle Processor (Operation up to 40 MIPS)
?8KB Nonvolatile FRAM (Ferroelectric Random Access Data Memory, In-System/ln-Application Programmable)
?64KB Flash (Program Memory, In-System/ln-Application Programmable)
?4K + 256 Bytes of SRAM (4K Bytes - Program Or Data Memory)
?JTAG Interface for FRAM/Flash Programming & Non-Intrusive Debugging/In-Circuit Emulation
?MULT/DIV/ACCU Unit including Barrel Shifter
?56/40 General Purpose I/Os (64/44-Pin Versions)
?2 Serial UARTs/2 Baud Rate Generators (16-bit)
?Enhanced SPI Interface (Fully Configurable Word Size)
?Fully configurable I2C Interface (Master/Slave)
?16 External Interrupt pins/Interrupt on Port Pin Change
?16-bit General Purpose Timer/Counters
?3 Timer Capture Inputs
?2 Pulse Width Counter Modules
?8 PWM Controller Outputs with Individual Timers
?PWMs can be used as General Purpose Timers
?Precision Internal Oscillator
?Dynamic System Clock Frequency Adjustment
?Power Saving Features
?Power-On Reset/Brown-Out Detect
?Watchdog Timer

Ordering Information -- Package

?VRS51L3074-40-QG