nrf52 pinout or dedicated pins

[Nils Minor]

Hi,

I was wondering about that I did not found any information about dedicated pin usage. I am using I2C/SPI and UART and did I understand it correctly that i can use nearly all of the pins for this, there is no dedicated pin/port?

I am also using PWM and since it is Hardware, not software anymore, can i also use every pin I want?

I have attached my Pinout/Pin usage, is this correctly?

best regards, Nils

Bildschirmfoto 2016-05-24 um 12.11.55.png

[MartinBL]

Hi,

Yes, all the digital interfaces like I2C and PWM can be mapped to any GPIO pin. This can be done directly in the registers or using the drivers found in our SDKs. The only exceptions to the rule are the analog and NFC pins which are connected to a fixed set of pins which you can find in the pin assignment diagram.

If you plan to use a lot of serial interfaces at once then this thread is relevant.

[Nils Minor]

Hi Martin,

thanks for your response, I understand this is good for my hardware design. I need I2C UART and SPI this should work i I use UART0, TWIM0 and SPIM, correct?

What about the PWM pins, can I use any pin I want ?

regards, Nils

[MartinBL]

Yes, that is correct. Use UART0, TWIM0, and SPIM1 or SPIM2. Here you can see a table of the peripherals sharing registers: Peripherals with shared ID.

[jefcap]

Hi Martin,

I could not find on nRF52832 datasheet about this restriction in using PWM in pins P0.09 and P0.10 (NFC pins). On nRF52 DK, I've tested the usage of NFC pins with PWM and I could see the voltage changing when applying different PWM values. So I'd like to understand what are the restrictions in using Analog and NFC pins to work with PWM. Is it related to current limitations?

Regards,