Pin configuration limitation

RE: Pin configuration limitation

awneil — Fri, 21 Jun 2019 10:02:39 GMT

[quote userid="73511" url="~/f/nordic-q-a/48848/pin-configuration-limitation/194052"]it should be clearly defined[/quote]

Yes - We've already agreed that in the Verified Answer.

RE: Pin configuration limitation

Vladimir Aparin — Fri, 21 Jun 2019 09:41:30 GMT

Sure I know, that the nRF52 are very flexible SoC. It's very good, but at the same time here may be the problem. Because if you think that you can configure any function on any GPIO and will make a PCB based on think mention, you can got an issue, when you get an exception (required function will not possible to set up on chosen pin). And you will get only when have an PCB and start to program it. So it should be clearly defined.

RE: Pin configuration limitation

awneil — Fri, 21 Jun 2019 09:20:43 GMT

[quote userid="73511" url="~/f/nordic-q-a/48848/pin-configuration-limitation/194030"]UART - it's only one type of pin using. It can be other interface - SPI, I2C etc[/quote]

The same applies to them - in general, any function can be routed to any pin.

Mostly, this is clearly stated in the Product Spec - this case is an exception, rather than the rule.

[quote userid="73511" url="~/f/nordic-q-a/48848/pin-configuration-limitation/194030"]other vendor providing special tool for graphical pin configuration[/quote]

On most other chips, the options are limited - so such a tool is really useful in navigating the options & restrictions.

But the nRF52 chips give you (almost) complete freedom - so it's not really so useful.

RE: Pin configuration limitation

Vladimir Aparin — Fri, 21 Jun 2019 08:55:51 GMT

The question may stay widely.
UART - it's only one type of pin using. It can be other interface - SPI, I2C etc.

The other vendor providing special tool for graphical pin configuration: PinMux by TI, Start by Atmel, CubeMX by ST. It's strange for me, that Nordic haven't someting similar. and I should to collect the information in some paragraphs of documentation, when i'm only want to configure pinout.

RE: Pin configuration limitation

awneil — Fri, 21 Jun 2019 07:34:58 GMT

[quote userid="6462" url="~/f/nordic-q-a/48848/pin-configuration-limitation/194007"]This has come up before regarding the "TWI" blocks - it is a really confusing and unhelpful way of organising the documentation[/quote]

Here:

https://devzone.nordicsemi.com/f/nordic-q-a/47060/at24c512-bmi160-nrf52/186098#186098

RE: Pin configuration limitation

awneil — Fri, 21 Jun 2019 07:32:57 GMT

It is clearly stated in the UARTE section of the Product Specification - page 364 in v1.3:

But you are right that it is not made clear in the UART section.

AFAIK, "UART" and "UARTE" are not two distinct peripheral blocks - there is just one "UART with EasyDMA" - so what applies to one must apply to the other.

This has come up before regarding the "TWI" blocks - it is a really confusing and unhelpful way of organising the documentation!