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[6]
Provides RIBUS device for power up status/configuration. Also, generation and monitoring of various
status and control signals are done through the ports of RIBUS.
[7]
Provides device to control and configure the two "DATA BACK PLANE INTERFACE" blocks through
the SPI bus and process DCC and AUX channels at the backplane.
[8]
Provide EEPROM for storing the configuration data.
[9]
Generates all the required voltages of 3.3V, 2.5V, 1.8V, 1.5V and 1.2V and provides circuitry for
monitoring these voltages.
[10] Provides timing circuitry, which includes 622 MHz VCXO and associated circuits for external clock
generation and PLL function.
[11] Provides one bicolour LED and a laser restart switch (the last drives both the optical interfaces on
board and on access card)
Other functions implemented are :
•
RIBUS I/F
This block is used to read/write from/to the "RIBUS" stream, to control the LED on the unit, to
release the Management–bus in case of power failure, and to use the remote inventory. RIBUS
I/F is powered by the + 3.3 Vdc supply by CONGI boards.
•
REMOTE INVENTORY
It is the memory containing the board information, for identification purposes (see para. 3.17
on page 370 for details).
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