topic Re: Kinetis / Latch input in Kinetis Microcontrollers

Kinetis / Latch input

asapuntz — Thu, 09 Mar 2023 01:19:48 GMT

Looking at KE1xF (or S32K14x)

PORTx->PCR[IRQC] allows an input pin to latch edges or levels which can then be read in PORTx->PCR[ISF] PORTx->ISFR. This is very handy to avoid missing transitions while software is busy with other activities.

However, it seems that this will produce in an interrupt (or DMA) if any pin on PORTx is configured to do so.

I've seen other (Cortex-M4) processors where masking of such interrupts is configurable on a per-pin (rather than per-port) basis. Is this level of control not available?

Re: Kinetis / Latch input

CarlosGarabito — Tue, 14 Mar 2023 16:09:04 GMT

Hi @asapuntz , sorry, but no, it is not available

Re: Kinetis / Latch input

asapuntz — Tue, 14 Mar 2023 17:07:55 GMT

would be useful to have PORTx->PCR[IRQC] options which don't produce interrupts or DMA

Re: Kinetis / Latch input

CarlosGarabito — Wed, 15 Mar 2023 18:02:14 GMT

We will consider it for new MCU designs, thank you.