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 ______________________________
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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)
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 __________________________
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Metering/Industrial Control
Instrumentation
Medical
Pin Configuration ______________________
Ramtron International Corporation
1850 Ramtron Drive Colorado Springs
Colorado, USA, 80921
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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
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
