Fujitsu MHW2040BS, Product Manual, Page: 79 / 296

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
previous primitive
The CONT primitive allows long strings of
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
acknowledge
Sent in response to a PMREQ_S or
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
denial
Sent in response to a PMREQ_S or
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
request to partial
This primitive is sent continuously until
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
request to slumber
This primitive is sent continuously until
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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