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| VRS51L3074 Preliminary Technical Brief Rev 1.1 FRAM Enhanced High Performance 8051 MCU General Description ____________________ 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's 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 (2% accuracy) and a watchdog timer. Communication and control of external devices is facilitated via an assortment of digital peripherals which include an 2 enhanced fully configurable SPI bus, an I C 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/lnApplication 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) 2 Fully configurable I C 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 Functional Diagram ____________________ Applications __________________________ * * * Metering/Industrial Control Instrumentation Medical Pin Configuration ______________________ Ramtron International Corporation 1850 Ramtron Drive Colorado Springs Colorado, USA, 80921 http://www.ramtron.com MCU customer service: 1-800-943-4625, 1-514-871-2447 x 208 1-800-545-FRAM, 1-719-481-7000 |
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