Atmel SpW-10X user manual Time-code Latency, SpaceWire Router, User Manual, Preliminary

SpW-10X	Ref.:	UoD_SpW-10X_
SpaceWire Router		UserManual
	Issue:	3.4
User Manual
	Date:	11th July 2008

SpaceWire port to SpaceWire port

Last bit of data into receiver to last bit of data out of transmitter (Worst case where transmitter is sending a time-code and FCT character before data)

TSSDATA = (5⋅TRXPERIOD)+ (8⋅TSYSPERIOD)+ (23⋅TTXPERIOD)

SpaceWire port to External port

Last bit of data into receiver to external port not empty flag

TSEDATA = (5⋅TRXPERIOD)+ (8⋅TSYSPERIOD)

External port to SpaceWire port

External port write enable to last bit of data out of transmitter (Worst case where transmitter is sending a time-code and FCT character before data)

TESDATA = (4⋅TSYSPERIOD)+ (23⋅TTXPERIOD)

External port to External port

External port write enable to external port not empty flag.

TEEDATA = (5⋅TSYSPERIOD)

10.6.4 Time-code Latency

The maximum time taken to propagate a time code through a routing switch

SpaceWire port to SpaceWire port

Last bit of time-code into receiver to last bit of time-code out of transmitter (worst case where transmitter has started sending a before time-code data character)

TSSTC = (5⋅TRXPERIOD)+ (6⋅TSYSPERIOD)+ (16⋅TTXPERIOD)

SpaceWire port to External port

Last bit of time-code into receiver to external port EXT_TICK_OUT rising edge

TSETC = (5⋅TRXPERIOD)+ (8⋅TSYSPERIOD)

External port to SpaceWire port

EXT_TICK_IN rising edge to last bit of time-code out of transmitter (worst case where transmitter has started sending a before time-code data character)

TESTC = (6⋅TSYSPERIOD)+ (16⋅TTXPERIOD)

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