3. Exception Handling
Rev.3.00 Jul. 19, 2007 page 82 of 532
REJ09B0397-0300
Bit 3—Timer FH Interrupt Request Flag (IRRTFH)
Bit 3: IRRTFH
Description
0
Clearing condition:
When IRRTFH = 1, it is cleared by writing 0
(initial value)
1
Setting condition:
When counter FH matches output compare register FH in 8-bit timer mode, or
when 16-bit counter F (TCFL, TCFH) matches output compare register F
(OCRFL, OCRFH) in 16-bit timer mode
Bit 2—Timer FL Interrupt Request Flag (IRRTFL)
Bit 2: IRRTFL
Description
0
Clearing condition
When IRRTFL = 1, it is cleared by writing 0
(initial value)
1
Setting condition:
When counter FL matches output compare register FL in 8-bit timer mode
Bit 1—Timer C Interrupt Request Flag (IRRTC):
Bit 1 is used in the H8/3857 Group. In the
H8/3854 Group, this bit must always be cleared to 0.
Bit 1: IRRTC
Description
0
Clearing condition:
When IRRTC = 1, it is cleared by writing 0
(initial value)
1
Setting condition:
When the timer C counter value overflows (goes from H'FF to H'00) or
underflows (goes from H'00 to H'FF)
Bit 0—Timer B Interrupt Request Flag (IRRTB
)
Bit 0: IRRTB
Description
0 Clearing
condition:
When IRRTB = 1, it is cleared by writing 0
(initial value)
1
Setting condition:
When the timer B counter value overflows (goes from H'FF to H'00)
Summary of Contents for F-ZTAT H8 Series
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