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Ramtron 8051-based MCU has 2Kbyte FRAM

Posted: 28 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:FRAM? flash memory? 8051-based MCU?


Ramtron International Corp. has launched the VRS51L3072, an 8051-based MCU with 2Kbytes of non-volatile FRAM. Ramtron has added FRAM to its flexible Versa 8051s for a quick and reliable non-volatile data storage and processing system that is suited for saving system status, data logging and storing non-volatile variables in a range of applications from sensors and meters to industrial controls, instrumentation and medical devices.

"We have expanded the Versa 8051 family with the 2Kbyte FRAM MCU for our customers who require a lower density FRAM for real-time data collection and storage," says David Lee, Ramtron international strategic marketing manager. "The high-performance core in the VRS51L3072 controls peripherals and gathers data, and its onboard DSP functions process the data, which is then stored in FRAM. Pin-compatible with our 8Kbyte FRAM MCUs, it's a cost effective alternative for applications that require less than 8Kbyte of FRAM."

The VRS51L3072 combines 2Kbytes of FRAM with a fully-integrated, high-performance SoC. Features include an advanced 40Mips, single-cycle 8051-core, 64Kbyte flash with in-system/in-application programming, 4Kbyte SRAM, DSP extensions, and a robust digital peripheral set. Operating at 3.3V over the entire industrial temperature range, the VRS51L3072 is a well suited embedded DAQ solution for different advanced applications.

Device features
The device offers 2Kbyte FRAM: 2,048 bytes of true non-volatile RAM (no battery/super cap required to maintain data) mapped into the VRS51L3072's XRAM memory for easy access, fast writes and essentially unlimited endurance.

It also has a 40MHz, single-cycle 8051 processor, one of the fastest 8bit processors on the market. Its advanced core can deliver up to 40Mips throughput and is instruction-compatible with standard 8051s for smooth device migration.

Another unique feature of the VRS51L3072 MCU is a MULT/ACCU/DIV unit with 32bit barrel shifter. According to Ramtron, this hardware calculation engine significantly outperforms 8bit processors when executing DSP operations such as FIR filtering, sensor output linearization and multiple-byte arithmetic operations. It performs 16bit signed multiplication and 32bit addition in one cycle and 16bit signed division in five cycles. The barrel shifter enables logic/arithmetic shift operations. And with a 40MHz internal oscillator, the device can cut system costs by eliminating the need for an external crystal oscillator.

Ramtron designed the product with a USB-JTAG Interface to provide user-friendly and quick device programming and real-time, in-circuit debugging/emulation of the user application without the need for a costly emulator.

Dual UARTs with baud rate generator are also integrated in the device. The universal asynchronous receiver/transmitters operate at up to 1.25Mbps. Each UART incorporates a dedicated baud rate generator with 20bit equivalent resolution. The device also offers enhanced SPI, with a communication speeds that can be configured up to 20Mbps and transactions adjustable from 1 to 32bits.

VRS51L3072 also includes two pulse width counter modules provide advanced timer control, simplifying event duration measurement as well as eight pulse width modulators (PWM) with 16bit adjustable resolution. Each PWM includes its own timer, which can also be used as general purpose timers.

Other support peripherals include an I?C interface, three 16bit general purpose timers/counters with three timer capture inputs, a watchdog timer and 49 interrupts that share 16 interrupt vectors.

Engineering samples of the VRS51L3072 are available now. The device is packaged in a RoHS-compliant 64-QFP housing. Unit pricing starts at $4.50 for quantities of 10,000 units.

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