VRS51L3174
Technical Brief
Rev 1.0
FRAM Enhanced High Performance 8051 MCU
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.
Support peripherals include a hardware based arithmetic unit
capable of performing complex mathematical operations, a JTAG
interface for Flash programming and non-intrusive in-circuit
debugging/emulation, an internal oscillator, and a watchdog timer.
Communication and control of external devices is facilitated via an
assortment of digital peripherals such as an enhanced, fully
configurable SPI bus, an I²C
interface, dual UARTs with
dedicated baud rate generators, three 16-bit timers, 8 PWM
controllers each with a 16-bit timer, and 2 pulse width counter
modules.
The VRS51L3174 operates from 3.0 to 3.6 volts over the
industrial temperature range and is available in a QFP-44
package. The device features an active-low reset and is pin-
compatible with an industry standard 8051 microcontroller
footprint.
F
IGURE
1: VRS51L3174 F
UNCTIONAL
D
IAGRAM
Feature Set
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8051 High Performance Single Cycle Processor
(Operation up to 40 MIPS)
64KB Flash Program Memory
(In-System/ln-Application Programmable)
4352 Bytes of SRAM (4KB + 256)
(Ext. 4KB can be used for program or data memory)
8192 Bytes of on-chip FRAM memory
JTAG Interface for Flash Programming and Non-Intrusive
Debugging/In-Circuit Emulation
MULT/DIV/ACCU Unit including Barrel Shifter
40 General Purpose I/Os
2 Serial UARTs/2 Baud Rate Generators (20-bit
resolution)
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
2 Pulse Width Counter Modules
8 PWM Controller Outputs with Individual Timers
PWMs can be used as General Purpose Timers
Internal
Oscillator
Dynamic System Clock Frequency Adjustment
Power Saving Features
Power-On Reset/Brown-Out Detect
Watchdog Timer
Operating voltage: 3.0V to 3.6V
Operating Temperature -40°C to +85°C
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F
IGURE
2: VRS51L3174 QFP-44
Ramtron International Corporation
1850 Ramtron Drive Colorado Springs
Colorado, USA, 80921
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http://www.ramtron.com
mcuinfo@ramtron.com
1-800-545-FRAM, 1-719-481-7000
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
