Achronix ACE Version 5.0 User Manual
Page 162
Views
Chapter 3. Concepts
Data Flow
Arrows connecting nodes for a reconvergent path diagram will point in
the direction of the asynchronous data flow, which (due to the underlying
async ’ack’ backward-propagation) is sometimes in the opposite direction
of the User Logic. These backward-propagation signals will be shown
with dotted line arrows. These backward-propagation signals are
normally hidden/abstracted out, but they are necessarily visible during
Critical Path Timing Analysis, particularly when dealing with
reconvergent paths. See
for more information.
Selection
The
Selection Options control the selection of objects in the Critical Path Diagram view.
Selection Options
Option
Default
Description
Select
Enabled
This radio button controls the action applied to objects in the
selection region. This setting causes the objects to be added to
the current ACE selection set.
Deselect
Disabled
This radio button controls the action applied to objects in the
selection region. This setting causes the objects to be removed
from the current ACE selection set.
Label
The
Label options control the text labels on graph nodes and arrows (instances and net
abstractions) in the Critical Path Diagram view. Note that these labels are only displayed when there is
enough room for them to be printed on-screen. It may be necessary to Zoom In to provide sufficient area
for all the desired text to be displayed.
Label Options
Option
Description
Pipeline Stages
Displays the number of pico-pipeline stages it takes to traverse the node or arrow.
1)
Delays
Displays the delay (in ps) to traverse each node or arrow.
Fanouts
Displays the fanout of the net represented by the arrow.
2)
Instance Names
Displays the instance name each graph node represents.
Instance Types
Displays the instance type (cell) for each graph node.
Net Names
Displays the net name represented by each arrow.
2)
Note:
1)
Only relevant for asynchronous devices. Synchronous target devices will never report stages.
2)
Only displayed when the ”Layer” option Intermediate Nodes is enabled, so that arrows indicate
individual nets.
Tool Tip Text
The
Tooltip options control the tooltip content while hovering over graph nodes and
arrows in the Critical Path Diagram view.
Tooltip Options
Option
Description
None
No tooltips will be displayed for nodes or arrows.
Pipeline Stages
Displays the number of pico-pipeline stages it takes to traverse the node or arrow.
3)
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