Fujitsu MHY2100BS, MHY2160BS, MHY2200BS, MHY2120BS, MHY2040BS, MHY2080BS manual Primitives descriptions

5.1 Physical Interface

5.1.2.2 Primitives descriptions

The following table contains the primitive mnemonics and a brief description of each.

Primitive	Name	Description
ALIGN	Physical layer control	Upon receipt of an ALIGN, the physical layer
		readjusts internal operations as necessary to
		perform its functions correctly.
CONT	Continue repeating	The CONT primitive allows long strings of
	previous primitive	repeated primitives to be eliminated. The
		CONT primitive implies that the previously
		received primitive be repeated as long as
		another primitive is not received.
EOF	End of frame	EOF marks the end of a frame.
PMACK	Power management	Sent in response to a PMREQ_S or
	acknowledge	PMREQ_P when a receiving node is prepared
		to enter a power mode state.
HOLD	Hold data transmission	HOLD is transmitted in place of payload data
		within a frame when the transmitter does not
		have the next payload data ready for
		transmission. HOLD is also transmitted on the
		backchannel when a receiver is not ready to
		receive additional payload data.
HOLDA	Hold acknowledge	This primitive is sent by a transmitter as long
		the HOLD primitive is received by its
		companion receiver.
PMNAK	Power management	Sent in response to a PMREQ_S or
	denial	PMREQ_P when a receiving node is not
		prepared to enter a power mode state or when
		power management is not supported.
PMREQ_P	Power management	This primitive is sent continuously until
	request to partial	PMACK or PMNAK is received. When
		PMACK is received, current node (host or
		device) will stop PMREQ_P and enters the
		Partial power management state.
PMREQ_S	Power management	This primitive is sent continuously until
	request to slumber	PMACK or PMNAK is received. When
		PMACK is received, current node (host or
		device) will stop PMREQ_S and enters the
		Slumber power management state.
R_ERR	Reception error	Current node (host or device) detected error in
		received payload.

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