Low-Level Access (LLA) operations provide a very efficient way to perform register-based communication. LLA operations incur much less overhead than HLA operations for certain types of accesses. LLA operations perform the same steps that the HLA operations do, except that each individual task performed by an HLA operation is an individual operation under LLA.

Bus Errors

The LLA operations do not report bus errors. In fact, viPeekXX() and viPokeXX() do not report any error conditions. When using the LLA operations, you must ensure that the addresses you are accessing are valid.