Texas Instruments TMS320TCI648x Portdisable, Outputportenable, Inputportenable, Errorcheckdisable

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			SRIO Registers
	Table 149. Port Control CSR n (SPn_CTL) Field Descriptions (continued)
Bit	Field	Value	Description
26–24	PORT_WIDTH_OVERRIDE		Port width override. This read-only field is available as a software
			means to override the hardware width.
		000b	No override
		001b	Reserved
		010b	Force single lane, lane 0
		011b	Force single lane, lane 2
		100b–111b	Reserved
23	PORT_DISABLE		Port disable
		0	Port receivers/drivers are enabled.
		1	Port receivers/drivers are disabled and are unable to
			receive/transmit any packets or control symbols.
22	OUTPUT_PORT_ENABLE		Output port enable
		0	The port is stopped and not enabled to issue any packets except
			to route or respond to I/O logical maintenance packets,
			depending upon the functionality of the processing element.
			Control symbols are not affected and are sent normally.
		1	The port is enabled to issue any packets.
21	INPUT_PORT_ENABLE		Input port receive enable
		0	The port is stopped and only enabled to route or respond I/O
			logical maintenance packets, depending upon the functionality of
			the processing element. Other packets generate
			packet-not-accepted control symbols to force an error condition
			to be signaled by the sending device. Control symbols are not
			affected and are received and handled normally.
		1	Port is enabled to respond to any packet.
20	ERROR_CHECK_DISABLE		Error check disable
		0	RapidIO transmission error checking and recovery are enabled.
		1	RapiIO transmission error checking and recovery are disabled. If
			an error condition occurs, device behavior is undefined.
19	MULTICAST_PARTICIPANT	0	Multicast-event participant enable. This read-only bit is 0 to
			indicate that multicast-event control symbols cannot be accepted
			by this port.
18–4	Reserved	0	These read-only bits return 0s when read.
3	STOP_PORT_FLD_ENC_ENABLE		Stop-on-fail enable
		0	Even when the Output Failed-encountered bit is set, the port
			continues to attempt to transmit packets to the connected device.
		1	When the Output Failed-encountered bit is set, the port sets the
			Port Error bit in the Port n Error and Status CSR and stops
			attempting to send packets to the connected device. Packets are
			discarded if the Drop Packet Enable bit is set.
2	DROP_PACKET_ENABLE		Drop packet enable
		0	The output port continues to try to transmit packets that have
			been rejected due to transmission errors.
		1	The output port drops packets that are acknowledged with a
			packet-not-accepted control symbol when the error failed
			threshold is exceeded. If the port "heals", and the current error
			rate falls below the failed threshold, the output no longer drops
			packets. (switch devices only)
1	PORT_LOCKOUT		Port lockout
		0	The port is enabled to issue any packets.
		1	The port is stopped and is not enabled to issue or receive any
			packets. The input port can still follow the training procedure and
			can still send and respond to link-requests. All received packets
			return packet-not-accepted control symbols to force an error
			condition to be signaled by the sending device.
SPRUE13A –September 2006			Serial RapidIO (SRIO)	207
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