Chapter 14 Watch Counter - Fujitsu F2MC-8FX Hardware Manual

Table 14.3-1 Functional Description of Each Bit of Watch Counter Data Register (WCDR)
Bit name
bit7 CS1, 0:
bit6 Count clock select bits
bit5
bit4
RCTR5 to 0:
bit3
Counter reload value
bit2
setting bits
bit1
bit0
These bits select the clock for the watch counter.
12 13
"00" = 2 /F , "01" = 2 /F
CL
(F : Subclock)
CL
These bits should be modified when the WCSR:ISEL bit is "0".
These bits set the counter reload value.
If the value is modified during counting, the modified value will become effective upon a reload after
the counter underflows.
Writing "0" : generates no interrupt request.
If the reload value (RCTR5 to RCTR0) is modified at the same time as an interrupt is generated
(WCSR:WCFLG = "1"), the correct value will not be reloaded. Therefore, the reload value must be
modified before an interrupt is generated, such as when the watch counter is stopped (WCSR:ISEL
bit = 0), or during the interrupt routine.
Function
14 15
, "10" = 2 /F , "11" = 2
CL CL

CHAPTER 14 WATCH COUNTER

/F
CL
211