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3. Instruction Set
3-53
CJ Instruction Program Flow
X1
CALL P63
P0
P63
CJ P0
I301
X0
0
The program flow
when X0=off,
X1=off
Main program
Main program
Main program
Interrupt subroutine
Command CALL subroutine
EI
DI
FEND
FEND
SRET
IRET
END
The program flow when X0=On
program jumps to P0