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

Table 9-10 Router Control Register Fields

Bits	Name	Reset Value	Description		Read/
					Write
0	Watchdog	Set by the input signal	When set to ‘1’ then the		R/W
	Timer Mode	POR_TIMEOUT_EN_N.	watchdog timer mode is
	/ Blocking	When ‘0’ – Watchdog Timer Mode	enabled.
	Allowed		When set to ‘0’ then the
	Mode	When ‘1’ – Blocking Allowed Mode
			blocking allowed mode is
			enabled.
			See section 8.3.5.
3:1	Timeout	Set by the input signal	Selects the blockage		R/W
	Selection	POR_SEL_TIMEOUT0_N.	timeout period. Values as
		When 0, timeout period is 60-80 µs.	below:
			“000” => 60-80 µs (N = 2)
		When 1, timeout period is ~1.3 ms.
			“001” => ~1.3 ms (N = 6)
			“010” => ~10 ms (N = 9)
			“011” => ~82 ms (N = 12)
			“100” => ~1.3 s (N = 16)
			“101” => ~1.3 s (N = 16)
			“110” => ~1.3 s (N = 16)
			“111” => ~1.3 s (N = 16)
			The actual value of the
			timeout period is given by:
			200 x (2^N) x TCLK
			+/- 200 x TCLK
			where TCLK is the period of
			the 10 MHz clock signal.
4	Enable	Set by the input signal	When set the		R/W
	disable on	POR_DISCONNECT_ON_SILENCE_N.	corresponding SpaceWire
	silence		port will be disconnected if
			no activity is detected over
			the timeout period.
			The SpaceWire port will
			only be disconnected if	the
			port was initially started
			when a packet arrived at
			the router to be routed out
			of the specific SpaceWire
			port and the start on
			request bit was set.
			If an external device starts
		Preliminary		118