The power consumption was reported by Paul Staron to be 100uA higher
when an AnalogIn was used previously.
Problem 1 is that 40uA was used by the async ADC clock, which is never
actually used, so it is disabled. Problem 2 is that setting it for high
speed mode increased it by another 60uA while in deepsleep. This
currently seems to me to be possibly a bug in the design, but the
workaround is checking if this is the case before going to deepsleep,
and if yes, disable it. Afterwards it is re-enabled.
Added extra code for Teensy3.1 deepsleep wake up restore function.
For some reason the Teensy3.1 would not wake from deepsleep, problem with restoring clock set ups. Possibly due to the higher clock frequencies requiring additional PLL locking time.
Most of the SystemInit() code was required. Teensy3.1 has no debug facilities, USBSerial is not usable during deepsleep/wakeup processes. Unless anyone has a better option.
Fully tested with InterruptIn and soft WakeUp.
Deepsleep is not really viable for this platform as it is not possible to isolate the interface chip from the power supply, 2.5mA at best in deepsleep mode.
Sissors
Paul Staron