Fujitsu FR81S User Manual
CHAPTER 27: UP/DOWN COUNTER
6. Operation and Setting Procedure Examples
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : UP/DOWN COUNTER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
26
Figure 6-3 Operation Performed When the Reload Function Is in Use
Note:
The value of the reload compare register (RCR) serves as both the reload value and compare value.
Therefore, when a value is reloaded to the reload compare register (RCR), the CMPF bit of the counter
status register (CSR) also changes to "1".
Therefore, when a value is reloaded to the reload compare register (RCR), the CMPF bit of the counter
status register (CSR) also changes to "1".
RCR
RCR : Reload compare register
Underflow
00
H
FF
H
(0FFFF
H
)
Reload (underflow interrupt
request generation)
Underflow
Reload (underflow interrupt
request generation)
MB91520 Series
MN705-00010-1v0-E
1033