Measurement question: what's the best way to measure the wakeup (idle/power-dn --> active) & shutdown (active --> idle/power-dn) time of LPC2106 by Philips using an oscilloscope? I'm using the IAR kickstart kit. -L
LPC2106: Measure wakeup/shutdown time
Started by ●April 12, 2006
Reply by ●April 13, 20062006-04-13
lawrence wrote:> Measurement question: what's the best way to measure the wakeup > (idle/power-dn --> active) & shutdown (active --> idle/power-dn) time > of LPC2106 by Philips using an oscilloscope? I'm using the IAR > kickstart kit. > > -LHi, for wake up, use EXINT and use that also as trigger, be aware that the 2106 is level triggered only. After waking up, the first instruction would be a toggle pin. The delay of the instruction is not relevant. For shut down, it is sort of easy, it is just the code through the pipeline. There will still be power consumption in your system as there are caps to be charged / discharged but the micro goes into power down within some tens of nanoseconds. I would be interested in your measurement for wakeup. It depends very much on your oscuillator circuit as the oscillator is turned off during power down and starting it up again it by far the dominating time. An Schwob