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MVME5100 Single Board Computer Programmer's Reference Guide

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2<br />

Hawk PCI Host Bridge & Multi-Processor Interrupt Controller<br />

RES Timer Resolution Approximate Max<br />

Time<br />

0100 16 us 1 sec<br />

0101 32 us 2 sec<br />

0110 64 us 4 sec<br />

0111 128 us 8 sec<br />

1000 256 us 16 sec<br />

1001 512 us 32 sec<br />

1010 1024 us 1 min<br />

1011 2048 us 2 min<br />

1100 4096 us 4 min<br />

1101 8192 us 8 min<br />

1110 16,384 us 16 min<br />

1111 32,768 us 32 min<br />

RELOAD Reload. This field is written with a value that will be used<br />

to reload the timer. The RELOAD field may only be<br />

modified on the second step of a successful two step<br />

arming process.<br />

Note An R206 resistor must be installed if a board reset is the result of<br />

a timeout of Watchdog Timer 2. See the attached sample for an<br />

example of PPCBug setting WDT2.<br />

PPC6-Bug>md feff0068<br />

FEFF0068 000FFFFF 0000FFFF 03FE4000<br />

00000000 ...........@.....<br />

FEFF0078 00000000 FFFFFFFE FFFFFFFF<br />

FFFFFFFF .................<br />

PPC6-Bug>md feff006c<br />

FEFF006C 0000FFFF 03FE4000 00000000<br />

00000000 ......@...........<br />

FEFF007C FFFFFFFE FFFFFFFF FFFFFFFF<br />

FFFFFFFF ...................<br />

PPC6-Bug>mw feff0068 55:b<br />

Effective address: FEFF0068<br />

Effective data : 55<br />

2-94 <strong>Computer</strong> Group Literature Center Web Site

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