Curtiss-Wright FHA5-XE1MWB04-00, User Manual

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APPENDIX D
10-5
SL240 XMC User Guide Copyright 2017
Several advantages of an FPDP interface include:
·
Simple hardware is required to interface to FPDP.
·
FPDP does not interfere with the normal bus operations—VME or PCI traffic can
continue without data transfers wasting bus bandwidth.
·
No bus contention is possible because there is only one transmitter.
·
No special backplane is required.
·
FPDP allows connections from VME chassis to VME chassis.
·
Systems may have multiple FPDP buses and thus provides scaleable bandwidth.
·
Multiple FPDP busses may coexist in one chassis.
·
Throughput can be accurately computed in the design stage.
·
Little software development is required to move data between cards.
·
Framed or unframed data may be transmitted across the FPDP link.
·
Low latency.
Some additional advantages of parallel FPDP are:
·
Low cost, 32-bit parallel interface provided through a ribbon cable.
·
160 MBps sustained data rate.
Some additional advantages of Serial FPDP are:
·
Noise immune fiber-optic interface.
·
Significantly increased transmission distance (10 km).
·
Standard cards for parallel FPDP, custom backplanes, PCI (PCI/PMC), and others
available.
10.2 Terminology
Some FPDP specific terms are defined below.
FPDP TRANSMIT MASTER (FPDP-TM)
An FPDP-TM is a device that transmits data and timing signals onto the FPDP bus. This device
also terminates the bus signals at one end of the ribbon cable bus for parallel FPDP. Only one
FPDP-TM may exist on an FPDP bus.
FPDP RECEIVE MASTER (FPDP-RM)
An FPDP-RM is a device that receives data from the FPDP bus synchronously with the timing
signals provided by the FPDP-TM. This device also terminates the bus signals at one end of the
ribbon cable bus for parallel FPDP. Only one FPDP-RM may exist on an FPDP bus.
FPDP RECEIVER (FPDP-R)
An FPDP-R is a device that receives data from the FPDP bus synchronously with the timing
signals provided by the FPDP-TM. As opposed to the FPDP-RM, this device does not terminate
any bus signals on parallel FPDP. Multiple FPDP-R devices may exist on an FPDP bus.