
9
Special Function Registers (SFR) (2 of 2)
Some registers have additional
bits defined
Peripheral behavior remains
unchanged if the default settings are
used
Porting considerations
• To maintain functionality verify that
default bit settings are used for
additional bits in common registers
Example:
• REF0CN register adds REFBGS to
halve the ADC reference voltage
•
Default setting maintains functionality
with the C8051F34A
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