Subject: DC-WG: Constriants review on DCWG Agenda 5/16
From: sharmav@us.ibm.com
Date: Fri May 05 2000 - 11:39:24 PDT
Mark,
Could we review the following proposed changes to the DCDL syntax on 5/16.
1. The external load command in the current version of the spec is
insufficient to
address asserting wire and pin capacitance. I propose that we either add
options
to external load command or create two separate commands in the Parasitics
section
to address this capability,
The syntax proposal is as follows,
wire_capacitance -total_cap double | -wire_cap double -nets / -pins
list of strings
-process worst_case / best_case / nominal
pin_capacitance -value double -pins list of strings -process
worst_case / best_case /nominal
et::set_driving_cell
2. driver_specification
Add the rise/fall, from pin , library and multiply options to the
driver_specification
-rise string
Specifies the name of the library cell driving the specified port for the rise transition only
-fall string
Specifies the name of the library cell driving the specified port for the fall transition only
-from_pin string
Specifies the name of the input pin on the library cell driving this port. This pin will be used for both rise and fall transitions.
-multiply_by double
Specifies the multiplication factor for delays and slews.
3. Disable command should allow library cells
-Vikas
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