Figure 14-2 Counter State Machine - Motorola DragonBall MC9328MX1 Reference Manual

Watchdog Timer Module
14.5 State Machine
No
Resets
Negated
?
Counting
Resumed
(fiq, irq,
reset)
Counter
Suspended
14-4
No
Time-out
Value
Yes
?
Yes
No
?
Reload Counter
Assert wdt_rst
Reset
Module
Figure 14-2. Counter State Machine
MC9328MX1 Reference Manual
Idle
No
Watchdog
Enabled
Yes
?
Yes
Start Counter
Decrement Counter
Counting
Yes
Halted
(WHALT=1)
?
No
WSR
Yes
Serviced
?
No
No
= 0
Count
?
Yes
Assert Time-out
Indication
No
Yes
Interrupt
Request
?
Assert wdt_int
Interrupt
Handler
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