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Spirit SP1ML internal schematic

Question asked by argonne.dario on Jan 10, 2016
Latest reply on Feb 23, 2017 by Zoran Najdovski
I'm developing a custom firmware for SP1ML but I miss important info regarding connections between the STM32L151RB and the SPIRIT chips. 
Analysing the firmware loaded on the SP1ML, I understood that:

    PA5     ------> SPI1_SCK
    PA6     ------> SPI1_MISO
    PA4     ------> SPI1_NSS
    PA7     ------> SPI1_MOSI 

    PA1     ------> SPIRIT_SDN

But I fail to understand how the 4 different IRQ pins of the SPIRIT are connected to the STM32L151RB. I guess that an IRQ is connected to PC4 but I don't know the corresponding IRQ line on the SPIRIT.