MCUs enshrine power-saving design from architecture to operating-modes

The MC9S08QE8 and MC9S08QE4 microcontrollers are new additions to the Freescale Semiconductor QE family designed for maximum energy efficiency, featuring architectural enhancements to reduce operating voltage as well as current and thereby extend battery life in portable or handheld products.

The MC9S08QE8 has a wide supply-voltage range from 1.8V to 3.6V, and also features a 20MHz CPU core, two 16-bit timers, and UART, SPI and I²C interfaces. There are also two analogue comparators, a 10-channel 12-bit ADC, an on-chip temperature sensor and an internal oscillator.

The MC9S08QE8 offers low-power features such as two stop modes, run and wait modes, 6µs wake-up time from Stop3 mode, an ultra-lowpower external oscillator, and clock-gating registers to disable clocks to unused peripherals.

The flexibility to turn peripheral clocks on and off individually allows designers to achieve high performance with very low overall power consumption.

The devices have 8-bit and 32-bit compatible options. Commonality between pins, peripherals and tools also aids the design process. The wide range of small-footprint package options comprising 16-pin TSSOP, 16-pin PDIP, 20-pin SOIC, 28-pin SOIC and 32-pin LQFP, provides many choices for designers targeting space-constrained portable applications.

The background debugging system and on-chip In-Circuit Emulation (ICE) with real-time bus-capture capability provide a single-wire debugging and emulation interface that eliminates the need for expensive emulation tools. On-chip memory resources include up to 8 kbytes of Flash memory, and up to 512 bytes of RAM. The Flash memory is specified to 10,000 write/erase cycles over temperature and 100,000 write/erase cycles (typical) at 25°C.

 

FEATURES Up to 26 GPIOs Integrated 1-pin BDM interface Internal-Clock Source (ICS) block On-chip voltage regulator with fast start-up Low-power 32kHz oscillator

APPLICATIONS Personal medical products Healthcare monitoring instrumentation Portable applications

 

 

Freescale’s DEMOQE8 and DEMOQE128 are available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Freescale Semiconductor / MC9S08QE8/QE4