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SEMI E32-0997 © SEMI 1994 , 1997 21 4.3.3 Ext ended Atomic Tr ansfer Stat e Mo del — Figure 4.8 presen ts an extended atomic transfer state model. This model extends the ato mic transfer model in a wa y similar to the tr…

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SEMI E32-0997 © SEMI 1994, 1997 20
PAUSE
The PAUSE state is an AND substate of TRANSFER
JOB ACTIVE. That is, the pause feature is concurrent
with the execution of the transfer job. The PAUSE state
has three substates: NOT PAUSED, PAUSING, and
PAUSED.
NOT PAUSED
A newly activated job is NOT PAUSED by default. In
this state, the transfer job proceeds as normal.
PAUSING
This state is coordinating the movement of the transfer
job from NOT PAUSED to PAUSED. It is responsible
for making sure that the current activity for each port
for the job has ceased at an appropriate point. The
transfer job is PAUSING until all of its active atomic
transfers are paused.
PAUSED
All activity has ceased. The transfer job is awaiting a
Resume command. Note that the PORT A, PORT B,
etc., substates retain their current states, but their
activity ceases when PAUSED.
The following transition table defines the added
transitions between states for the extended transfer job
state model. It applies to Figure 4.7.
Table 4.3 Extended Transfer Job State Transition Table
# Current State Trigger New State Action(s) Comment
9 ABORTING Abort process is complete. (Transfer Job
Complete)
Send “Transfer Job Complete”
message to host indicating
abnormal termination.
Host or equipment
previously issued
abort.
10 STOPPING Stop process is complete. (Transfer Job
Complete)
Send “Transfer Job Complete”
message to host indicating
abnormal termination.
Host or equipment
previously issued
abort.
11 (Undefined) Default entry into PAUSE state. NOT PAUSED None. None.
12 NOT PAUSED Host or equipment issued a
directive to pause.
PAUSING None. None.
13 PAUSING All transfer job activity has
ceased.
PAUSED None. “Transfer Job
Paused” event has
occurred.
14 PAUSED Host issued a directive to resume
the transfer job.
NOT PAUSED None. “Transfer Job
Resumed” event
has occurred.
15 (Undefined) Default entry into STOP state. NOT STOPPING None. None.
16 NOT STOPPING Stop initiated. STOPPING Begin stop activities. None.
17 (Undefined) Default entry into ABORT state. NOT
ABORTING
None. None.
18 NOT ABORTING Abort initiated. ABORTING Begin abort activities. None.
19 TRANSFER JOB
QUEUED
Cancel, Abort, or Stop command
received.
TRANSFER JOB
CANCELLED
Remove the transfer job from
the queue.
None.
SEMI E32-0997 © SEMI 1994, 199721
4.3.3 Extended Atomic Transfer State Model — Figure
4.8 presents an extended atomic transfer state model.
This model extends the atomic transfer model in a way
similar to the transfer job extension. It provides for the
capability to pause/resume and to abort
12
. Except for
the extensions, this model is the same as that presented
as Figure 4.6. Therefore, only the extensions are
discussed in this section.
Figure 4.8
Extended Atomic Transfer State Diagram
WAIT
The atomic transfer stops activity and awaits a
StartHandoff command from the host. This capability
allows the host to precisely orchestrate the timing of the
handoff in time critical operations.
ABORT
The ABORT state is an AND substate of TRANSFER
ACTIVE. This state is responsible for coordination of
any activities necessary to abort the active atomic
transfer. The ABORT state has two substates:
ABORTING and NOT ABORTING.
NOT ABORTING
In this state, the abort process is not in effect. The
atomic transfer proceeds normally.
12 Note that “stop” does not apply to atomic transfers, since the
active atomic transfers are allowed to complete when the transfer job
is stopped.
ABORTING
In this state, the process of aborting is performed. It is
the responsibility of the equipment to cease physical
activity as quickly as possible and end the current
atomic transfer. This process is application-specific. It
is the responsibility of the supplier to document this
method.
PAUSE
The PAUSE state is an AND substate of ATOMIC
TRANSFER ACTIVE. That is, the pause states are
concurrent with the execution states of the atomic
transfer. The PAUSE state has three substates: NOT
PAUSED, PAUSING, and PAUSED.
NOT PAUSED
A newly activated atomic transfer is NOT PAUSED by
default. In this state, the atomic transfer proceeds as
normal.
PAUSING
This state is coordinating the movement of the atomic
transfer from NOT PAUSED to PAUSED. It is
responsible for making sure that the current activity for
the atomic transfer has ceased at an appropriate point.
PAUSED
All activity has ceased. The atomic transfer is awaiting
a Resume command. Note that the PORT A, PORT B,
etc., substates retain their current states, but their
activity ceases when PAUSED.
The following transition table defines the added
transitions between states for the extended atomic
transfer state model. It applies to Figure 4.8.
SEMI E32-0997 © SEMI 1994, 1997 22
Table 4.4 Extended Atomic Transfer State Transition Table
# Current State Trigger New State Action(s) Comment
3 SETUP Preparation for atomic transfer
is complete, and TRAutoStart
parameter is TRUE.
AWAITING XFR
PARTNER
None. “Committed to Transfer”
event
7 ABORTING Abort process is complete. ATOMIC
TRANSFER
COMPLETE
None. “Atomic Transfer
Complete” event occurs
noting abnormal
termination.
8 (Undefined) Default entry into PAUSE. NOT PAUSED None. None.
9 NOT PAUSED The transfer job transitioned to
PAUSING state (Transition 12,
Figure 4.7).
PAUSING None. None.
10 PAUSING All atomic transfer activity has
ceased.
PAUSED None. None.
11 PAUSED The host issued a directive to
resume the atomic transfer.
NOT PAUSED None. None.
12 (Undefined) Default entry into ABORT. NOT ABORTING None. None.
13 NOT ABORTING Transfer job transitioned to
ABORTING state (Transition
18, Figure 4.7).
ABORTING Begin abort
activities.
May be host- or
equipment- initiated.
14 ATOMIC
TRANSFER
QUEUED
Abnormal Transfer Job
termination.
ATOMIC
TRANSFER
COMPLETE
None. May be caused by transfer
job abort or stop.
15 SETUP Preparation for atomic transfer
is complete, and TRAutoStart
parameter is FALSE.
WAIT Wait for host
command.
None.
16 WAIT StartHandoff command is
received from host.
AWAITING XFR
PARTNER
None. “Committed to Transfer
2” event
4.4 Macro Level Services — This section defines the messaging services required to implement the material
movement concepts. The messages were introduced in Sections 4.2.1 and 4.3.1. These services are independent of
the messaging protocol to be used. They may be mapped to SECS–II (SEMI E5) or to other comparable protocols.
These messaging services define the messages to be used, the nature of the data items or parameters to be contained
within the messages, and data type of the parameters. Not defined here is the internal structure of the actual
messages as transferred, including order of the parameters and how various data structures and data types are
represented.
4.4.1 Service List — The following messages are exchanged between host and equipment for the purpose of
accomplishing material movement tasks.
Host Initiated Services
Service Name Description Confirmed*
TRJobCreate Host request that a transfer job be performed. Yes
TRJobCommand Command which affects a transfer job. Yes
GetAttribute Request for attributes of an object (e.g., transfer job or atomic
transfer). This message service has applicability beyond material
movement.
Yes
* An unconfirmed service requires no response to the request message. This means that no data is required in the response. This does not preclude
the implementation of a response message in the message protocol.