Message Interface Signals

Table 1. Message interface
Signal Name	Direction	Width	Clock Domain	Descriptions
MSG	Output	256	AXI_CLK	Inbound message interface data bus.
MSG_BYTE_EN	Output	32	AXI_CLK	Indicates which bytes of MSG are valid.
MSG_DATA	Output	1	AXI_CLK	Indicates that MSG contains message data.
MSG_END	Output	1	AXI_CLK	Indicates that MSG contains the last stripe of a message.
MSG_PASID	Output	22	AXI_CLK	PASID value.
MSG_PASID_PRESENT	Output	1	AXI_CLK	When asserted with MSG_START, indicates the presence of PASID.
MSG_START	Output	1	AXI_CLK	Indicates that MSG contains the start of a message i.e., a message header.
MSG_VALID	Output	1	AXI_CLK	Indicates that MSG_<name> signals are valid.
MSG_VDH	Output	1	AXI_CLK	Indicates that MSG contains a vendor-defined message header.