Fujitsu FR81S User Manual
CHAPTER 18: WATCHDOG TIMER
1. Overview
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : WATCHDOG TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
3
1. Overview
This section gives an overview of the watchdog timer.
This device has two watchdog timers that can detect both the states of software and hardware running out of
control, and these watchdog timers can generate reset requests.
Figure 1-1 Block Diagram (schematic)
Watchdog 0
(Software Watchdog)
Watchdog reset 0
Watchdog 1
Watchdog reset 1
(Hardware Watchdog)
Bus Access
Peripheral clock
(PCLK)
CR
oscillator
MB91520 Series
MN705-00010-1v0-E
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