Fujitsu 8FX Hardware Manual page 140

CHAPTER 9 WATCH PRESCALER
9.4 Operations and Setting Procedure
Example
■ Setting Procedure Example
Below is an example of procedure for setting the watch prescaler.
● Initial settings
1. Set the interrupt level. (ILR*)
2. Set the interval time. (WPCR:WTC[2:0])
3. Enable interrupts and clear the interrupt request flag. (WPCR:WTIE = 1, WPCR:WTIF = 0)
4. Clear the counter. (WPCR:WCLR = 1)
*: For details of the interrupt level setting register (ILR), refer to "CHAPTER 5 INTERRUPTS" in this
hardware manual and "■ INTERRUPT SOURCE TABLE" in the device data sheet.
● Processing interrupts
1. Clear the interrupt request flag. (WPCR:WTIF = 0)
2. Clear the counter. (WPCR:WCLR = 1)
118 FUJITSU SEMICONDUCTOR LIMITED
MB95630H Series
MN702-00009-2v0-E