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Traffic will be affected
Actions required to operator: quick unit replacing
•
PW Fail: Power supply/reference voltage circuits failures.
Consequent actions: shutdown of pump laser and TECH
Classification: internal urgent alarm
Traffic affected
Actions required to operator: unit replacing
•
PuShd: Pump Shutdown: pump laser off (zero current)
•
Cover_Op: Cover Open: access fibre protective cover removed
May force or not pump shutdown (according CoREn configuration control)
SPI Interface
The main interface between preamplifier unit and shelf controller is the standard SPI serial bus.
This interface is managed on the board by the Spider ASIC, acting as Slave Interface and signal buffer;
some pins of the Spider are used as I/O parallel ports.
On the internal SPI bus two other devices are connected:
•
serial EEPROM for remote inventory informations
•
DSP microprocessor
A direct connection between shelf controller and DSP microprocessor (or serial EEPROM) can be
established by Spider (acting as chip select decoder, electrical interface and protocol adapter).
ED
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3AL 91669 AA AA
674
422
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674
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