
5 INSTRUCTION SET
30
EPSON
S1C33 FAMILY C33 PE CORE MANUAL
5.6.3 Exception Handling for ext Instructions
For exceptions associated with ext instructions, exception handling is started immediately for reset and debug
break, but is not started for other exceptions until after the target instruction to be extended is executed. This is
intended to simplify operation for the compression of
ext instructions in prefetch. Furthermore, as the address to
which the program is returned by
reti or retd at the end of exception handling is the ext instruction, in no case
will the
ext instructions operate erratically due to exception handling. (For two ext instructions, control returns
to the first
ext.)
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