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UEXT on Cobra


#1

The UEXT connector on FEZ Cobra has IO48 for the UEXT IRQ pin. It looks like IO48 is not interrupt capable.

Has anyone has issues using the SPI interface on the UEXT ?


#2

Io48 on the uext connector is for pwm use, not sip.


#3

Yes Mike IO48 is for PWM but some of the UEXT addons have the following pin out

VCC-----------------GND
TX--------------------RX
CE--------------------IRQ
MISO-----------------MOSI
CLK------------------CSN


#4

There is not pin defined as IRQ but maybe some extension needed this pin as interrupt? What extension are you using?


#5

Yes there is no UEXT pin as IRQ but for the Nordic Wireless Extension, pin 6 is IRQ.

It is not a problem for me as I am not using the extension and I can move the wire to pin 4, RX_IN which is not needed for this extension.