Achronix ACE Version 5.0 Uživatelský manuál stáhnout pdf (Strana 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 Analyzing Critical Paths 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.

Delays

Displays the delay (in ps) to traverse each node or arrow.

Fanouts

Displays the fanout of the net represented by the arrow.

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.

Note:

Only relevant for asynchronous devices. Synchronous target devices will never report stages.

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.

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