TsctlBusRefreshDesc
From embeddedTS Manuals
Some busses support atomic reading and writing segments of its data. A bus that supports this operation will implement the Refresh function to atomically read those segments that support this function.
One example of a bus that does this is CacheBus. This bus supports caching portions of a (presumably slow) bus backed by hardware registers.
Refresh should always be called before Commit.