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mattvenn committed Apr 21, 2023
1 parent dc14a4f commit a27d01e
Showing 1 changed file with 6 additions and 7 deletions.
13 changes: 6 additions & 7 deletions INFO.md
Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,9 @@ and reduces the number of buffers:
The main change to the `scanchain` block is related to the clocking and the
data output. Previously, you'd have something like this :

clk_in ---|>----|>---- clk_out
|
'------- Internal FFs
clk_in ---|>----|>---- clk_out
|
'------- Internal FFs

That is, you had an input buffer receving clock from the previous block and
sending it to all the scan chain FF and to a strong output buffer that would
Expand All @@ -41,10 +41,9 @@ The issues that were identified there are :

The new block is like this :

clk_in ---|>o--------- clk_out
|
'-|>o--- Internal FFs

clk_in ---|>o--------- clk_out
|
'-|>o--- Internal FFs
You have a single inverter that receives the clock and sends it inverted to
the next block. That inverted clock is also fed to another small inverter
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