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 9-3 GAR Table Register Description

Address Range: 32-255 (0x0000 0020 – 0x0000 00FF)

Bits	Name	Reset	Description	Read/Write
		Value
0	RESERVED	‘0’	Reserved bit – always set to zero.	R
10:1	REQUEST	Undefined	The request bits determine which output ports	R/W
		after power	the logical address will arbitrate for. When bit
		on.	1 is set then SpaceWire port 1 will be
		Unaltered	requested. When bit 2 is set then SpaceWire
			port 2 will be accessed and so on.
		by reset.
			By setting more than one bit group adaptive
			routing can be used, allowing the input packet
			to arbitrate for more than one output port.
			If a write is performed and bits 10:1 are set to
			zero then the INVALID_ADDR bit will be set
			and all other bits will be set to zero
			Note: The configuration port (port 0) is not
			accessible through logical addresses.
28:11	NOT USED	-	-	-
29	DEL_HEAD	Undefined	Delete header: when set the leading header	R/W
		after power	byte of the input packet will be removed
		on.	before it is transferred to the output port.
		Unaltered
		by reset.
30	PRIORITY	Undefined	When a packet has a logical address with an	R/W
		after power	entry in the priority filed of this register set, the
		on.	packet will be granted access to a particular
		Unaltered	output port in preference to packets with
			priority bit set to zero.
		by reset.
31	INVALID_ADDR	‘1’	When the Invalid Address bit is set it indicates	R/W
			that the corresponding logical address is
			invalid. In this case, any packets arriving at
			the router with an invalid address are spilt and
			an address error is reported in the port status
			register.

Preliminary 107