Tie off unused cell pins
Syntax
tie_unused_pins [‑of_objects <args>] [‑quiet] [‑verbose]Usage
| Name | Description |
|---|---|
[-of_objects]
|
tie unused pins of specified cell(s) |
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
Categories
Description
Tie up or down the unconnected pins of cells in the open synthesized or implemented design. The command uses an internal process to identify whether a pin should be tied up or down.
This command is intended to tie up or down the unconnected pins of cells added to the netlist with the create_cell command.
Arguments
-of_objects <args> - (Optional) Tie up or down the unused pins of the specified cell objects.
Note: The
-of_objects option requires objects to be specified using the get_* commands, such as get_cells or get_pins, rather than specifying objects by name. In addition, -of_objects cannot be used with a search <pattern>.
-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the
set_msg_config command.Example
The following example ties the unused pins of cells up or down, depending on their usage:
tie_unused_pins -of_objects [get_cells cpuEngine]