Interrupt for i.MX8M Mini

[Norihiro]

Hello, 

Our customer need to use 8 IRQ (they planned to use IRQ56 ~ IRQ63) for external interrupt signals on i.MX8M Mini. They designed PCB to use 4-11 of GPIO1, but they noticed that 0-7 of GPIO1 was fixed for interrupt. Therefore, they can only use IRQ56-59 on their board.

Is there any way to support up to 8 interrupts from 4-11 of GPIO1 other than INT0-7?

In worst case scenario, customer is thinking of using the following IRQ 64.

   "Combined interrupt indication for GPIO1 signal 0 throughout 15"

In that case, is it possible to separate the operation of GPIO1  4 - 7 and use only GPIO1  8 - 11 to control IRQ64?

Thanks,

Norihiro Michigami

AVNET

[jimmychan · Accepted solution]

FYI. Please read this thread for the gpio interrupt concept.

https://community.nxp.com/t5/i-MX-Processors/Interrupts-with-GPIO1-INT0-7/m-p/221515#M14660

And you can find the interrupt source by checking the GPIOx_ISR even the same group of gpio. Please read the chapter 8.3.2.3 Interrupt Control Unit in the RM for details.