HITACHI SEMICONDUCTOR TECHNICAL UPDATE
DATE
TN-H8*-171A/E
No.
25 May 2000
THEME
Attention on use Timer F
Spec. change
Supplement of Documents
Limitation on
CLASSIFICATION
PRODUCT NAME
Lot No. etc.
H8/3887 series, H8/3847 series, H8/3867 series,
H8/3827 series, H8/3847R series,
All Lot
H8/3827R series, H8/3802 series
Effective Date
Eternal
H8/3887 series, H8/3847 series Hardware Manual Rev. 2.0
H8/3867 series, H8/3827 series Hardware Manual Rev. 3.0
H8/3847R series, H8/3827R series, H8/3802 series
Hardware Manual Rev. 1.0
REFERENCE
DOCUMENTS
From
We appreciate your selection of Hitachi microcomputers.
We inform you of additional information for Hitachi single chip
microcomputer H8/3887/47/67/27/47R/27R series, H8/3802 series Hardware Manual.
<Additional contents>
9.4 Timer F ---(For H8/3887/47 series, in section 9.4 on P 197. For H8/3867/27 series,
in section 9.4 on P 194. For H8/3827R series, in section 9.4 on P 193.
For H8/3847R series, in section 9.4 on P203. For H8/3802 series,
in section 9.3 on P 174)
9.4.5 Application Notes ---(For H8/3887/47 series, in section 9.4.5 on P 214.
For H8/3867/27 series, in section 9.4.5 on P 212.
For H8/3827R series, in section 9.4.5 on P 210.
For H8/3847R series, in section 9.4.5 on P 220.
For H8/3802 series, in section 9.3.5 on P192)
(3) Clear timer FH, timer FL interrupt request flags (IRRTFH, IRRTFL), timer overflow flags
H, L (OVFH, OVFL) and compare match flags H, L (CMFH, CMFL)
When f w/4 is selected as the internal clock, “Interrupt factor generation signal” will be operated
with f w and the signal will be outputted with f w width.
And, “Overflow signal” and “Compare match signal” are controlled with 2 cycles of f w signals.
Those signals are outputted with 2 cycles width of f w. (Figure1)
In active (high-speed, medium-speed) mode, even if you cleared interrupt request flag during the
term of validity of “Interrupt factor generation signal” , same interrupt request flag is set. (Figure 1-1).
And, you cannot be cleared timer overflow flag and compare match flag during the term of validity of
“Overflow signal” and “Compare match signal”.
1
ETC [ ETC ]
