Type of access

Register accesses assume the form of Reads, Writes, or Compares:

Read: Performs a register read (of specified width) from a given offset relative to a given address space.

Write: Performs a register write of a given value (of specified width) to a given offset relative to a given address space.

Compare: Performs a Read operation, but additionally applies a user-defined mask to the result of the read operation (using a logical AND). The result of the bit mask is then compared to another user supplied value. The Compare operation is useful for examining individual bits or combinations of bits within a single register.