W90N745CD/W90N745CDG
Continued
BITS
DESCRIPTIONS
Watchdog Timer Interrupt Enable
[6]
0 = Disable the Watchdog timer interrupt
1 = Enable the Watchdog timer interrupt
WTIE
Watchdog Timer Interval Select
These two bits select the interval for the Watchdog timer. No matter
which interval is chosen, the reset timeout is always occurred 512
WDT clock cycles later than the interrupt timeout.
Interrupt
Timeout
Real Time Interval
(CLK=15MHz/256)
WTIS
00
Reset Timeout
214 + 1024
clocks
216 + 1024
clocks
218 + 1024
clocks
220 + 1024
clocks
0.28 sec.
1.12 sec.
4.47 sec.
17.9 sec.
214 clocks
216 clocks
218 clocks
220 clocks
[5:4]
WTIS
01
10
11
Watchdog Timer Interrupt Flag
If the Watchdog timer interrupt is enabled, then the hardware will set
this bit to indicate that the Watchdog timer interrupt has occurred. If
the Watchdog timer interrupt is not enabled, then this bit indicates that
a timeout period has elapsed.
[3]
WTIF
0 = Watchdog timer interrupt does not occur
1 = Watchdog timer interrupt occurs
NOTE: This bit is read only, but can be cleared by writing 1 to this bit.
Watchdog Timer Reset Flag
When the Watchdog timer initiates a reset, the hardware will set this
bit. This flag can be read by software to determine the source of
reset. Software is responsible to clear it up manually. If WTRE is
disabled, then the Watchdog timer has no effect on this bit.
[2]
WTRF
0 = Watchdog timer reset does not occur
1 = Watchdog timer reset occurs
NOTE: This bit is read only, but can be cleared by writing 1 to this bit.
Publication Release Date: September 22, 2006
- 295 -
Revision A2
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