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PIC18 (Priority Interrupts (Not in PIC16, High priority, Low priority,…
PIC18
Priority Interrupts
Not in PIC16
High priority
Low priority
High overides low
Multiplier
Difference from PIC16
Included in hardware
One instruction cycle
Instructions
MULWF
MULLW
Registers
PRODL
PRODH
Access Bank
Not in PIC16
16 banks
Virtual bank
Overflow & Carry
Differences
Contains overflow bit
Similarity
Conatins Carry bit
Tables
PIC16
Lookup tables
Use PCL???
software
PIC18
Table read
table write
Hardware
Branch Instructions
Write directly to PC
Instructions
goto
call
PIC18
More than 1 program word wide
PIC16
1 program word wide
Fast Register Stack
Fast call Intstructions