Can I use the LPC11U24?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by marmot2 on Fri Jan 03 14:44:12 MST 2014
I have an existing product (using pic16lf1947) I would like to redesign using the LPC11U24. It is a battery operated unit which counts switch closures (occuring from 120 to 8000ms apart) and displays counts/min on a segmented LCD with an accuracy of about 1%. It must use less than 40uA while sleeping between events as battery must last for years. The current MCU uses an external 32,768 xtal to count milliseconds between events. It seems that I would need the Power-Down or Deep-Power-down modes to get to my target power consumption, but then I lose all clocks except WD. I'm planning on using the PCF85176 to drive the LCDs. Can anybody think of a slick way to count the milliseconds between events? Am I missing something obvious? :-)

I've been playing with the 11u24 on the mbed and really love the ARM capabilities compared to the PIC as well as the ease of flashing.