PPC7A Product Manual
Functional Description
8-5
1
st
Edition
Soft Reset
This causes the processor to reach a recoverable state and then branch to either 0x0000 0100 or
0xFFF0 0100, depending on the state of the IP bit in the processor’s Machine State Register.
The following table summarizes events that may cause a soft reset:
S
OURCE
Front-panel Soft Reset
P0 (where fitted) soft reset signal (pin C2)
Hardware Events
P8 (on-board connector) soft reset signal (pin 11)
Software Events
HOT_RESET bit in ISA-bridge
The front panel soft reset switch may be disabled under software control or by fitting hardware jumper
E14.
The standard boot firmware does not support the use of soft reset.
VMEbus Remote Reset
Another VME master may reset the PPC7A
via the Universe II control registers. This causes a hard
reset.
Watchdog Reset
If enabled and triggered (via the Watchdog control register), the watchdog will cause a hard reset unless
re-triggered (via the Watchdog Trigger Register) every 1.6 seconds.
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