Can one of the GPIOs of Si4x6x be used to supply the TCXO?
The TCXO can be directly powered from GPIO0, GPIO2 or GPIO3. But, it cannot be supplied from GPIO1.
GPIO1 changes its states during booting up, so it is not appropriate to constantly feed the TCXO.
The GPIO0 can also have enough drive capability to power the TCXO.
GPIO0,2,3 can be used with the "DRIVE1" or "IN_SLEEP" command to supply the TCXO.
What's the effect of the TCXO wake-up time (e.g. 2 ms) on the response time listed in table 10 of the Si4463 datasheet?