The SMAMA5D27 part is relatively well documented.
The data sheet is comprehensive and the evaluation kit makes it easy to get started with this device.
There are an amazing array of internal peripherals that have some documentation, but many details are not clear.
The crypto unit has a lot of information on performance, but the detail on how fast the crypto core is run is not obvious.
The performance of the various memories is also not so clear. What is the overhead to get to Li, L2 or SRAM?
There are details, like the 256 bit register, is it truly in the register file or an alternate register file?
How fast can the crypto unit be clocked? What is recommended speed?
Thanks for any suggestions of pointers.