some warning when load lef in Encounter

[Greatrebel]

Hi all,

when I load a design in Encounter, I got some warnings which I am not sure would hurt my design.

There are a lot of warnings when I load I/O lef.

Pin 'PAD' in macro 'PRDW0812SCDG_25' has no ANTENNAGATEAREA attribute defined. For any non-power/ground input or inout pin, The attribute should be
defined if any area ratio antenna attribute is defined on any layer.

When load timing lib, a lot of warnings like

**WARN: (TECHLIB-436): Attribute 'max_fanout' on output/inout pin 'Z' of cell 'AN2HVTD0' is not defined in the library

Any help will be appreciated.

 

[shelby]

Both are fine.

PAD pins have no routing so you can't get antenna violations.

max_fanout isn't always defined for library cells (sometimes they have a default at the top of the .lib) Usually max_cap and max_trans are more of a concern than max_fanout.