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AVR flash MCUs roll for high-volume USB apps

Posted: 21 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:transceiver? flash memory? USB? Atmel? AVR?

Flash MCUs from Atmel

Expanding its family of AVR MCUs, Atmel Corp. has launched two new devices for high-volume USB applications ranging from HID to wireless adaptors.

Based on the 8bit AVR core, the new AT90USB82 and AT90USB162 feature a full-speed USB (12Mbps) controller and have 8Kbtyes and 16Kbytes of flash memory, respectively, allowing in-system programming directly through their USB interface. On-chip EEPROM of 512bytes allows for parameters settings without interfering with the application.

On-chip voltage regulator
The devices provide communication with external components with SPI and UART interfaces. A 100mA on-chip voltage regulator can also power companion devices such as laser sensors for high-performance mice or RF transceivers for wireless adapters.

The AT90USB82/162 are available in 32-pin packages including a tiny 5-by-5mm QFN. In addition, they offer 21 GPIOs that can be used to detect interrupts. This is suitable for applications such as high-end mice or joysticks that have an increasing number of switches.

Full-speed USB enables accurate and fast reaction to use the capability of the advanced laser sensors while providing adequate bandwidth for audio streaming applications such as VoIP and handsets. The same device can be used in wireless desktop center to support a mouse, a keyboard and a bidirectional audio device. AT90USB162's flash memory can be programmed in 0.5s due to full-speed bandwidth. The program can be loaded at the end of the manufacturing line without the need for a dedicated connector to accommodate in-system programming, which lowers costs and manages space. This gives flexibility for concurrent engineering, OEM/ODM customization, or even for upgrade of products by the end user.

Cost, flexibility trade-off
"Our new low pin-count USB devices complement the higher-end AVR OTG and USB devices we introduced last year," said Jean-Christophe Lawson, Atmel's USB product marketer manager. "They are two times smaller than most of existing solutions, achieving a trade-off between cost and flexibility."

Evaluation and debugging tools are available. The STK526 development kit is priced at $199. It can be used in standalone form to demonstrate HID, CDC and mass storage. It can also be used as an extension to the generic STK500. The JTAGICE mkII and AVR Dragon can connect to the starter kit for in-system programming and emulation through OCD.

The AT90USB162 is offered in 32-pin QFN and TQFP packages and the AT90USB82 in QFN. The AT90USB162 is already available while production of the AT90USB82 will start Q3 2007. AT90USB162 is priced at $1.65 and AT90USB82 at $1.45, both for 10,000 pieces.

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