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Atmel rolls additional AVR 32bit MCUs

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

Keywords:32bit flash MCU? DSP extensions? USB 2.0? OTG capability?

Atmel Corp. has introduced a second family based on the AVR 32 UC core, its 32bit flash MCU with DSP extensions.

Developed for low power PC-centric applications, the AVR32 UC3B series of MCUs has Full-Speed (12Mbps) USB 2.0 with On-The-Go (OTG) capability. On-chip SRAM ranges from 16Kbytes to 32Kbytes and on-chip flash from 64Kbytes to 256Kbytes.

The family targets applications such as appliance control, security systems, industrial control and automation and PC peripherals.

The AVR32 UC3B devices deliver 72 Dhrystone MIPS (DMIPS) at 60MHz, include true single-cycle MACs and DSP arithmetic and consume only 23mA at 3.3V. With power consumption as low as 1mW/DMIPS, UC3B series MCUs outperform by a ratio of 3 any other available architectures offering similar features, the company said. The standby power consumption of UC3B series is 30mA using a single 3.3V power supply and below 15mA when the dual power supply (1.8V/3.3V) is used.

The AVR32 UC3B Full-Speed USB 2.0 interface allows communication with PCs through various USB classes such as human interface device class for serial data communication or mass-storage class for larger bulk data transfers. The OTG capability changes a USB device into a USB host on-the-fly, enabling peer-to-peer communication between two USB devices. The UC3B series devices also feature a 10bit ADC, one SPI, synchronous serial interface (SSC), I?C-compatible two-wire interface, three UARTs, three general purpose timers, seven pulse width modulators and a full set of supervisory functions.

UC3B series MCUs have DMA-enabled peripherals with a seven-channel peripheral DMA controller and a five-layer high speed bus matrix with point-to-point connections from all masters to all slaves at a maximum speed of 240MBps at 60MHz each.

Atmel provides the AVR32 GNU C tool chain and real-time kernel free of charge. Commercial software is also available including: IAR (C compiler-Embedded Workbench), ExpressLogic (RTOS-ThreadX) and Micrium (RTOS-uCOS/II).

Atmel's AVR32 Studio and AVR JTAGICE mkII, provide the AVR32 UC3B series with a multiplatform IDE already configured for the GNU tool chain, including support for advanced debugging sessions with data and code trace using the AVR32's Nano Trace or Nexus class 2+ interface. The ATEVK1101 kit is available for AVR32 UC3B series evaluation.

The AT32UC3B0256 and AT32UC3B1256 in a QFP package are priced at $4.96 and $4.66, respectively, in 10,000-unit quantities.

The first two devices of the UC3B series are sampling now. The AT32UC3B0256, with OTG, is packaged in a 64-pin QFP/QFN and the AT32UC3B1256, without OTG capability, is packaged in a 48-pin QFP/QFN.

- Ismini Scouras

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