Fujitsu FR81S User Manual
CHAPTER 21: 32-BIT FREE-RUN TIMER
7. Q&A
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: 32-BIT FREE-RUN TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
38
7.4. How to Clear the Free-run Timer?
This section shows how to clear the free-run timer.
You can clear the free-run timer using the following method.
⋅
Set using the clear bits (TCCSn.SCLR [n=3 to 5]).
Operation
Clear bit (SCLR)
To clear the free-run timer
Write "1".
⋅
Perform a reset.
When a reset is performed (RSTX pin input, watchdog reset, software reset, etc.), the free-run timer
will be cleared to its initial state.
⋅
Write "0000_0000
H
" while the free-run timer is inactive.
If "0000_0000
H
" is written while the free-run timer is inactive, the count value will be "0000_0000
H
".
⋅
Overflow of the free-run timer will result in the count value returning to "0000_0000
H
".
⋅
It will be cleared if there is a match with the compare clear register.
MB91520 Series
MN705-00010-1v0-E
833