Fujitsu FR81S 사용자 설명서
CHAPTER 21: 32-BIT FREE-RUN TIMER
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: 32-BIT FREE-RUN TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
28
5.1.2. Counting Up
This section shows counting up.
32-bit free-run timer is an up counter. The counter starts counting up from the timer data register (TCDT)
configured in advance. It continues to count up until the count value matches the value of the compare clear
register (CPCLR). The counter will then be cleared to "0000_0000
H
" and start counting up again.
Figure 5-1 Up Counter Operation
FFFFFFFF
H
BFFFFFFF
H
7FFFFFFF
H
3FFFFFFF
H
00000000
H
Count value
Reset
Time
Timer operation start
Compare clear match
7FFFFFFF
H
Compare clear
register
BFFFFFFF
H
FFFFFFFF
H
MB91520 Series
MN705-00010-1v0-E
823