Configuration Of Watch Prescaler - Fujitsu F2MC-8FX Hardware Manual

13.2

Configuration of Watch Prescaler

The watch prescaler consists of the following blocks:
• Watch prescaler counter
• Counter clear circuit
• Interval timer selector
• Watch prescaler control register (WPCR)
Block Diagram of Watch Prescaler
Watch prescaler counter (counter)
F
CL
divided
by 2
Watchdog timer clear
Interrupt
of watch
prescaler
(To the selector of
watch counter)
F : Subclock
CL
Figure 13.2-1 Block Diagram of Watch Prescaler
1 2 3 4 5
x 2 x 2 x 2 x 2 x 2
Counter clear
Resets, stops
Counter clear
Subclock
WTIF WTIE
Watch prescaler control register (WPCR)
To oscillation stabilization wait timer of subclosk,
watchdog timer, watch counter
6 7 8 9 10 11
x 2 x 2 x 2 x 2 x 2 x 2
circuit
- -
CHAPTER 13 WATCH PRESCALER
12 13 14 15
x 2 x 2 x 2 x 2
15
(2 -2)/F to (2
CL
To clock control
oscillation stabilization
wait time selector
Interval timer
selector
- WTC1 WTC0 WCLR
1
-2)/F
CL
193