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Spirit1 - External Clock from MCU or using Low Power Oscillator

Question asked by abramo.jacopo on Jul 2, 2015
Latest reply on Jul 7, 2015 by abramo.jacopo

I have a problem with my test board. I am using a Spirit1 module on a PCB toghether with a STM32F103 microcontroller, trying to implement a wireless comunication. On the board there are two different oscillators: a 8 MHz quartz oscillator for the microcontroller and a 52 MHz quartz for the Spirit1. The problem is that I found out that the XIN and XOUT pins of the Spirit1 are not connected to the 52 MHz oscillator, so the module stays in READY state after exiting from shutdown. I wanted to know if:

- it is possible to configure the low frequency  internal oscillator (at 34.7 kHz) of the Spirit1 as the reference clock;
- it is possible to eventually generate an external clock coming from the MCU (for example through a PWM) to one of the GPIOs of the Spirit1.

Thank you for your attention.