SN8F2280 Series
USB 2.0 Full-Speed 8-Bit Micro-Controller
If the destination increased by 1, which results overflow of 0xFF to 0x00, the PC will add 2 steps to skip next
instruction.
INCS instruction:
INCS
JMP
…
BUF0
C0STEP
; Jump to C0STEP if ACC is not zero.
; Jump to C0STEP if BUF0 is not zero.
…
NOP
C0STEP:
INCMS instruction:
INCMS
JMP
…
BUF0
C0STEP
…
C0STEP:
NOP
If the destination decreased by 1, which results underflow of 0x00 to 0xFF, the PC will add 2 steps to skip next
instruction.
DECS instruction:
DECS
JMP
…
BUF0
C0STEP
; Jump to C0STEP if ACC is not zero.
…
C0STEP:
NOP
DECMS instruction:
DECMS
JMP
…
BUF0
C0STEP
; Jump to C0STEP if BUF0 is not zero.
…
C0STEP:
NOP
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