UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
925 of 1269
NXP Semiconductors
UM10503
Chapter 34: LPC43xx Windowed Watchdog timer (WWDT)
Fig 109. Early Watchdog Feed with Windowed Mode Enabled
125A
1258
1259
1257
WDCLK / 4
Watchdog
Counter
Early Feed
Event
Watchdog
Reset
Conditions :
WINDOW
= 0x1200
WARNINT
= 0x3FF
TC
= 0x2000
Fig 110. Correct Watchdog Feed with Windowed Mode Enabled
Correct Feed
Event
1201
11FF
1200
WDCLK / 4
Watchdog
Counter
Watchdog
Reset
11FC
11FD
2000
1FFE
1FFF
11FE
1FFD 1FFC
Conditions :
WDWINDOW = 0x1200
WDWARNINT = 0x3FF
WDTC
= 0x2000
Fig 111. Watchdog Warning Interrupt
Watchdog
Interrupt
0403
0401
0402
WDCLK / 4
Watchdog
Counter
03FE
03FF
03FD
03FB
03FC
0400
03FA 03F9
Conditions :
WINDOW
= 0x1200
WARNINT
= 0x3FF
TC
= 0x2000