15.2.1.1 FSR DFM Read
DFM is accessed by loading the FSRxH:FSRxL register pair with the address to be read, and loading
bits [7-4] of the FSRxH register with a value of ‘0111
’. When a
MOVIW
instruction, or any instruction that accesses INDFx, is
executed, the value loaded into the FSRx register pair points to the location in program
memory to be accessed. If the FSRx register pair points to an unimplemented address
location, the read will return ‘0
’.