Hitachi H8/3152 Hardware Manual page 70

instruction are correct. If they are not correct, EEPROM will be incorrectly written to due to
invalid register settings.
In this case, system operation can be stopped by writing 1 to the HLT flag, or the external systems
can be notified of the abnormal operation by outputting a signal to an I/O pin.
--- Example of program in EWE interrupt routine ---
EWEentry:
BTST #6, @TCSR
BEQ ERROR
MOV.W @(2,SP), R0
MOV.W #H'7B5C, R1
MOV.W #H'598F, R2
MOV.W @R0, R3
CMP.W R1, R3
BNE ERROR
MOV.W @(2,R0), R3
CMP.W R2, R3
BNE ERROR
MOV.W @(-18,R0), R2
CMP.W R2,R5
BNE ERROR
RTE
ERROR:
MOV.B #H'FF, R0L
MOV.B R0L, @TCSR
--- End ---
66
; reconfirmation
; EEPMOV instruction line check
; R5 set value check
; system halt