What is actual size required for scratch area for CCM on nrf52?

[will]

Hello:

I read the documentation and errata for Rev 1 of the nrf52. I am using the Rigado BMD300 module (thus the nrf52) without a softdevice attempting to do on the fly encryption/decryption. I have noticed that the scratch area required by the nrf52 is much greater than the 43 bytes mentioned in the documentation. It appears it is more on the order of 67 words (67 * 4 octets).

Has anyone else experienced this before?

Thanks!

[Torsten Robitzki]

I found this thread, because I was running in the same Problem. BTW: the term MAXPACKETSIZE is used exactly once in the documentation. So I understood it to be the maxium packet size, not the maximum value that could be stored in the length field.