compatibility between NRF51822G2 and NRF51822H0

[User2]

Hello,

I developed a code (softdevice S110 and SDK 10) on a prototype based on a NRF51822G2 chip. I tried to reproduce the prototype with NRF51822H0 chip.

I flashed softdefice and my application but it doesn't work on NRF51822H0 chip (I can see the device with a smartphone but I can't make a connection).

Is it a problem of compatibility?

Best regard

[tesc]

Hi,

According to the nRF51822 IC revision overview nRF51822 QFAAG2 is IC revision 2, nRF51822 QFAAH0 is IC revision 3. Both have the same package and the same Flash and RAM.

It seems strange then, that the revision 2 chip works fine while the revision 3 chip fails, when the nRF51 Series IC revisions compatibility with SDK and SoftDevices document claims the opposite compatibility.

• Was the project started using SDK 10, or is it ported from an earlier version?
• Can you update your question with further descriptions of how connecting fails?

To me it sounds like it may be a timing and/or chrystal issue.

Regards, Terje

[User2]

Thanks for this response, I check the crystal and associate capacitors propoerties.

The capacitors have 5% of tolerance and the requirements seems to be 2% or less.

I tried to test these oscillators :

I use the code posted here : devzone.nordicsemi.com/.../

I have a 16.44 kHz signal.

I measured the clock at the output of the oscillator and I have an voltage offset of + 0,8 V