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

			SpW-10X	Ref.:	UoD_SpW-10X_
			SpaceWire Router		UserManual
				Issue:	3.4
			User Manual
				Date:	11th July 2008
			should be pulled down (e.g. 4k7 Ω).
166	EXT_TIME_IN(7)	In	EXT_TIME_IN(7:0) provides the value of the time-			CMOS3V3
165	EXT_TIME_IN(6)		code to be distributed by the router when an
164	EXT_TIME_IN(5)		external time-code source is selected i.e. when
163	EXT_TIME_IN(4)		SEL_EXT_TIME is high on the rising edge of
162	EXT_TIME_IN(3)
			EXT_TICK_IN.
161	EXT_TIME_IN(2)
			When SEL_EXT_TIME is high on the rising edge of
160	EXT_TIME_IN(1)
			EXT_TICK_IN the value of the time-code counter is
159	EXT_TIME_IN(0)
			used for bits 5:0 of the time-code and bits 7:6 of the
			EXT_TIME_IN(7:0) are used for the two control
			signals, bits 7:6 of the time-code.
			If the time-code port is not being used these inputs
			should be pulled down (e.g. 4k7 Ω).
167	SEL_EXT_TIME	In	If SEL_EXT_TIME is high on the rising edge of			CMOS3V3
			EXT_TICK_IN the value on EXT_TIME_IN(7:0) is
			loaded into the internal time-code register and
			propagated by the router.
			If SEL_EXT_TIME is low on the rising edge of
			EXT_TICK_IN the value to be sent in the time-code
			will be taken from the internal time-code counter in
			the router. The two control-bits (bits 7:6) of the
			time-code will come from bits 7:6 of the
			EXT_TIME_IN(7:0) input.
			If the time-code port is not being used this input
			should be pulled down (e.g. 4k7 Ω).
168	TIME_CTR_RST	In	This signal causes the internal time-code counter to			CMOS3V3
			be reset to zero.
			The timing parameters used for EXT_TICK_IN also
			apply to the time-code counter reset signal
			(TIME_CTR_RST).
			If the time-code port is not being used this input
			should be pulled down (e.g. 4k7 Ω).
169	EXT_TICK_OUT	Out	The falling edge of EXT_TICK_OUT is used to			CMOS3V3
			indicated the reception of a time-code. The value of
			this time-code is place on the EXT_TIME_OUT(7:0)
			outputs and is valid on the rising edge of
			EXT_TICK_OUT.
179	EXT_TIME_OUT(7)	Out	Received time-code value which is valid when			CMOS3V3
178	EXT_TIME_OUT(6)		EXT_TICK_OUT is asserted.
177	EXT_TIME_OUT(5)
176	EXT_TIME_OUT(4)		The value of a received time-code is output on the
173	EXT_TIME_OUT(3)
			Preliminary			40