We plan to use a low power external oscillator for clocking the the MKW01Zxx for metering application.
As per MKW01xxRM Reference Manual, "
An external clock can be used to replace the crystal
oscillator...." Can you please provide the part# for such an external clock?
Thanks.
You can use the BOM for the FRDM-KW019032 as reference, but this is just a reference you need to test it in your design.
Regards
Vicente Gomez