Emerson 752I Manuel D’Utilisation
Reset Logic:
Reset Sources
3-3
RESET SOURCES
The Katana
752i circuit board can be reset from the following sources:
• Power-On Reset (POR) circuitry
• CompactPCI Reset
• Power Monitor Reset
• 750GL Processor Reset (JTAG header)
• Remote IPMI Reset
• Front Panel Reset
• Watchdog Timer Reset
CompactPCI Reset Enable
The Katana
752i has an optional configuration jumper at JP2 (see
). When installed
(default condition), this jumper enables the board to send a reset signal (when the front
panel reset switch is pressed) to the cPCI system controller via the cPCI_PRST pin. Upon
receiving this signal, the cPCI system controller generates a cPCI reset. When the jumper is
not installed, the Katana
panel reset switch is pressed) to the cPCI system controller via the cPCI_PRST pin. Upon
receiving this signal, the cPCI system controller generates a cPCI reset. When the jumper is
not installed, the Katana
752i does not send the reset signal to the cPCI system controller
when the reset switch is pressed.
Another optional configuration jumper at JP1 (see
), when installed (default condi-
tion), enables the cPCI reset signal to drive a local PCI reset to the 750GL reset logic (see
). When the jumper is not installed, the Katana
752i ignores the cPCI reset signal.
Power Monitor
The Katana
752i has a power monitor circuit that detects low voltage conditions on any of
the power supply sources. The circuit will hold the oscillators off and drive the power-on
reset (POR) for as long as the low voltage condition exists.
reset (POR) for as long as the low voltage condition exists.
750GL Processor Reset
752i implements the 750GL processor
reset logic.
shows how the reset signals connect to the related devices.
Note:
The Device Bus PLD is also known as the MVC PLD.