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Buses
System Controller
PPC/CPCI-690
5 - 5
Watchdog
The system controller includes a bi-level watchdog timer which monitors
the processor activity. The watchdog timer generates a non-maskable inter-
rupt (NMI) after the first time-out period and a system reset pulse after the
second time-out period.
The watchdog can be enabled and disabled via Watchdog Configuration
register by a write sequence of 01b followed by 10b to field CTL1. If en-
abled, the watchdog is a free running counter that needs to be triggered pe-
riodically in order to prevent expiration. Watchdog service is done by
writing 01b followed by 10b to field CTL2 of the Watchdog configuration
register. For further information, refer to the GT-64260A System Controller
for PowerPC Processors data sheet.
The watchdog is running with the system controller’s core frequency and
time-out ranges are from 1.92 µs. to 32 s. Both time-out values are software
programmable and can be changed during watchdog operation.
Note: PowerBoot implements time-out ranges from 1 to 32 s only.
Содержание PPC/CPCI-690
Страница 1: ...PPC CPCI 690 Reference Guide P N 227356 Revision AC June 2006 ...
Страница 12: ...xii PPC CPCI 690 Battery Exchange Figure 19 Battery Location A 3 Figure 20 Dot Position on BatteryA 4 ...
Страница 16: ...xvi PPC CPCI 690 SRAM Static RAM TPE Twisted Pair Ethernet UART Universal Asynchronous Receiver Transmitter ...
Страница 22: ...xxii PPC CPCI 690 ...
Страница 28: ...xxviii PPC CPCI 690 ...
Страница 35: ...1 Introduction ...
Страница 36: ......
Страница 43: ...2 Installation ...
Страница 44: ......
Страница 46: ...Action Plan Installation 2 4 PPC CPCI 690 ...
Страница 64: ...Board Installation Installation 2 22 PPC CPCI 690 ...
Страница 65: ...3 Controls Indicators and Connectors ...
Страница 66: ......
Страница 75: ...4 PowerBoot ...
Страница 76: ......
Страница 128: ...Command Set PowerBoot 4 54 PPC CPCI 690 ...
Страница 129: ...5 Buses ...
Страница 130: ......
Страница 148: ...Local I2C Buses Buses 5 20 PPC CPCI 690 ...
Страница 149: ...6 Maps and Registers ...
Страница 150: ......
Страница 164: ...Register Maps and Registers 6 16 PPC CPCI 690 ...
Страница 165: ...A Battery Exchange ...
Страница 166: ......
Страница 169: ...B Troubleshooting ...
Страница 170: ......
Страница 176: ...I 2 PPC CPCI 690 ...