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All things pertaining to wireless and RF links
By DarioG
#31977
I've come to my first battery-powered device with Nordic RF modules.
I'm using a 18F2620 PIC, which reaches some 50-10uA when in sleep (it's good enough, probably I still have to check for something... I'm using internal oscillator, disabled BOR, PWRTE, WATCHDOG and other fancy things...)
But the TRW24 module, even if CE-disabled, still seems to draw some 350-400uA. I'm wondering "how" do I have to set all of its pins (CLK, CS... DATA? will it be floating so I have to keep it low, or high...? and DR?) in order to reduce consumption.

Thank you for your input. I did not find this in the datasheet...
Supposed current drawing in PowerDown mode should be 12uA, if I'm not wrong from the datasheet...
By DarioG
#32284
A bit of followup:
After having tested every pin of the PIC for "floatness" (I was already sure, but I did double check), I checked every used pin of TRW24, and they too were kept to known state when in sleep.
Then I discovered that leaving CLK2 (I'm not using Channel2) floating, was sinking those 300-500uA. I connected it to VCC and everything seems to be ok now.
Funny is, tieing it to GND, cause the other channel to stop working...

Am not sure that datasheet describes this behaviour, that is, I did not find it.