Kontron AdvancedTCA AT8001, Руководство пользователя

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AT8001 User’s Guide
The FWUM itself is a microcontroller with internal flash to store IPMC firmware image. This
microcontroller is also an external watchdog for the IPMC. Functions of this microntroller is kept to
a minimum. The FWUM firmware is field updatable.
Note:
The IPMC and the FWUM have an internal hardware watchdog.
2.14 FPGA
The FPGA has various functions. One of them is to act as a companion chip to the IPMC. The states of
all the critical signals controlled by the IPMC are memorized in the FPGA and are preserved while
the IPMC firmware is being updated.
The FPGA is a RAM-based chip that is preloaded from a separate PROM at power-up. Two such PROMs
are provided. One that can only be programmed in factory and an other one that can be updated in
the field. The PROM is selected through jumper JP8. Field updates require to cycle the power of the
board.
The appropriate procedure to upgrade the FPGA will be provided with the update code when
needed.
Note:
FPGA version is displayed in the BIOS summary screen (you need to enter the BIOS setup).
2.15 Telecom Clock Option
The telecom clock option is not shown on the main block diagram. The circuit is made of MLVDS
buffers, a PLD and a multi-service line card PLL. The PLD is hooked to the main FPGA with a fast
serial link and from there, to the LPC bus.