Add example timing tree.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
2019-05-07 12:12:36 -07:00 · 2019-05-07 12:12:36 -07:00 · b14952e1da
parent 64798087b1
commit b14952e1da
1 changed files with 28 additions and 0 deletions
--- a/prjxray/timing.py
+++ b/prjxray/timing.py
@ -28,6 +28,34 @@ and inpins are leafs of the elmore tree. Wires and pass-transistor switches are
 nodes in the tree. Wires share their capacitance upstream and downstream using
 a pi-model.

+Example timing tree:
+
+------+
+|Outpin|
+--+---+
+   |
+   |
+   v
+--+--+
+|Wire |
+--+--+
+   |
+   +-----------------+
+   |                 |
+--+---+     +-------+------+
+|Buffer|     |PassTransistor|
+--+---+     +------+-------+
+   |                |
+   v                v
+--+-+           +--+-+
+|Wire|           |Wire|
+--+-+           +--+-+
+   |                |
+   v                v
+--+--+          +--+--+
+|Inpin|          |Inpin|
+-----+          +-----+
+
 """
 import enum
 from collections import namedtuple