Having trouble posting links.
To do a quick search on Arm Holdings, go to USPTO.GOV >>> click on Quicksearch and enter ``Arm Holdings``
This is by no means a comprehensive search but is meant to spark some discussion by others more qualified than I.
The patents below seem relevant in a general sense.
6,907,478 Systems and methods optimizing data transfer throughput of a system on chip
6,650,589 Low voltage operation of static random access memory