Is there any pinout difference in rev1 and rev3 nRF51822 chips

[asma]

Hi Everyone ,

We were using nrf51822 rev1 IC for our project and now it is changed to nrf51822 rev3 . Previously we were able to detect the chip in nRfgo Studio on our custom board , but now it is not getting detect with rev3 IC there is no change of hardware in our board. So need to know if there is any change in pinout of IC .

Thanks & Regards, Asma

[Michael Dietz]

Yes, there is a difference. It is true there is no pinout difference for the three revisions. But there are differences internally. For example newer SDKs won't work on old revisions and it may be true vice versa (older SDKs don't work on newer revisions out of the box? really not sure here). Anyways look at the whitepaper Fredrik linked to above. Also you need to make sure that the softdevice you are using will work on the revision of the chip you have. Another thing: the amount of memory you have (FLASH and RAM) may change so make sure your project settings in keil or linker file in GCC are correct for the revision.

Just know that things change when switching revisions. The link Fredrik posted should solve the problem.

[asma]

Thanks for the reply fredrik and michael. i will go through the white papers , but still one question project settings comes afterward first atleast it should be able to detect my chip on the board, right?