wishbone.md: add a diagram.

cfe9afe1 · Tristan Gingold · 1bbeef0b · cfe9afe1
Commit cfe9afe1 authored Jun 17, 2019 by Tristan Gingold
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wishbone.md doc/wishbone.md +7 -0

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--- a/doc/wishbone.md
+++ b/doc/wishbone.md
@@ -147,6 +147,13 @@ Note that if ACK is combinational, a transaction requires at least 2 cycles:
  {name: 'ack', wave: '0.10'}
 ]}

+  _
+_| |_
+  ____      __
+_^    v____/  \__[]
+ _____ ____
+X_____X____
+
 For block read/write, STB has to be deasserted before starting a transfer:

 {signal: [