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CHAPTER 16 WILD REGISTER FUNCTION
16.1 Overview of the Wild Register Function
The wild register function is a function for patching the faulty part of a program by
setting the address and the correct data in the incorporated registers. Up to two bytes
of data correction is possible.
■ Wild Register Function
The wild register function assigns an address in the ROM area of the microcontroller and replaces the
existing data corresponding to the address, with new data. For example, if an error exists in a program,
setting the address of the faulty part and correction data to the register can correct the faulty data.
■
Wild Register Applicable Addresses
The address area where the wild register function can apply varies slightly with the models. Table 16.1-1
shows the wild register applicable addresses for each model.
Note:
The wild register function cannot be debugged with a tool. Perform the operation check of the wild
register on the actual microcontroller, MB89202/F202/F202RA.
Table 16.1-1 Wild Register Applicable Addresses
Model name ROM area
MB89V201
8000
H
to FFFF
H
MB89202/F202
C000
H
to FFFF
H