Owner manual

WDOG Functionality VMP3
Page A - 4 © 2005 Kontron Modular Computers GmbH ID 29230, Rev. 01
29230.01.UG.VC.050727/091441
P R E L I M I N A R Y
Figure A-1: WDOG Functional States
Counter Running
RESET
Counter
Overflow
Interrupt State
Counter Running
Force Reset
RST_OUT = active
Counter Running 1
Counter Running 2
Interrupt Path
Reset Path
WD-State-Diagramm VMP3
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WEN = R/W
WMD = R/W WTM = R/W
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WMD[1:0] = 10b
WEN = 1
WTR = 1
IRQ_OUT = active
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WTR = 1
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WTR = 1
Counter
Overflow
Dual Stage
WMD[1:0] = 11b
WEN = 1
IRQ_OUT = active
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WTR = 1
Counter
Overflow
WTR = 1
Counter
Overflow
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
IRQ_OUT = inactive
RST_OUT = active
WTE = R/W WTR = R/W
WMD = R WTM = R
WMD[1:0] = 01b
WEN = 1
Timer Only
WMD[1:0] = 00b
WEN = 1
Counter Running
Counter
Overflow
Timer Expired
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WTR = 1
IRQ_OUT = inactive
RST_OUT = inactive
WTE = R/W WTR = R/W
WMD = R WTM = R
WTR = 1