The MAXQ622® microcontroller with integrated USB transceiver from Maxim Integrated Products (Sunnyvale, CA) features an ultra-low stop-mode current (300nA, typ.) and intelligent supply switching to extend battery life in portable consumer and medical applications. Designed for low-power applications, this microcontroller operates from either an external supply (1.7V to 3.6V) or directly from USB power.

Intelligent supply monitoring enables the microcontroller to conserve power by actively switching from the main supply during periods of USB connectivity. It includes 128KB of flash memory, 6KB of data RAM, dual USART ports, dual SPITM master/slave communication ports, an I2C port, an infrared module with carrier-frequency generation, and up to 56 general purpose I/O pins. It also provides a secure memory-management unit

(MMU) to prevent device cloning and unauthorized access to sensitive application code. It is available in a 64-pin LQFP package and as bare die.

An evaluation kit is available with an evaluation board and a PC-based integrated development environment (IDE), which provides a debugger, assembler/linker, time-limited version of the IAR C-compiler, and simulator.

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This article first appeared in the September, 2010 issue of Embedded Technology Magazine.

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