22.20.1 timer_add_clock_exception

Adds an exception to or from a pin with respect to a specified clock.

timer_add_clock_exception clock clock_name -pin pin_name -dir value

Arguments

-clock clock_name

Specifies the name of the clock.

-pin pin_name

Specifies the exception on the pin in a synchronous network to be excluded from the specified clock period.

-dir value

Specifies direction.

Table 22-2.
Value	Description
from	Refers to paths starting at the specific pin.
to	Refers to paths ending at the specific pin.

Supported Families

All

Exceptions

For the ProASIC3/E, ProASICPLUS, ProASIC, Axcelerator, eX, and SX-A families, the timing analysis tool translates this command to an equivalent SDC command set_multicycle_path.

Examples

The following example adds a clock exception from the pin reg_q_a_10_/U0:CLK with respect to the clock clk.

timer_add_clock_exception clock {clk} -pin {reg_q_a_10_/U0:CLK} -dir {from}

The following example adds a clock exception to the pin reg_q_a_10_/U0:E with respect to the clock clk.

timer_add_clock_exception clock {clk} -pin {reg_q_a_10_/U0:E} -dir {to}

See Also

timer_remove_clock_exception

set_multicycle_path

Tcl documentation conventions