From 90ffbf0786380b004f7ab9c0f087ceb286d749ac Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Fri, 30 Oct 2020 19:47:48 +0100
Subject: [PATCH] Added comment on internal and external flow control.

---
 applications/lofar2/doc/prestudy/desp_hdl_design_article.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/applications/lofar2/doc/prestudy/desp_hdl_design_article.txt b/applications/lofar2/doc/prestudy/desp_hdl_design_article.txt
index 76087b7e1c..3a6c99add1 100644
--- a/applications/lofar2/doc/prestudy/desp_hdl_design_article.txt
+++ b/applications/lofar2/doc/prestudy/desp_hdl_design_article.txt
@@ -26,6 +26,10 @@ Idea / rule: Distinguish beteen state registers and pipeline registers.
   the pipelining is added as a seperate stage. Either pipeline sosi if no flow control is needed
   or pipeline siso if flow control is needed. For example: dp_block_resize.vhd, dp_block_select.vhd,
   dp_counter.vhd.
+. Components that do not need input flow control can support external flow control by simply wiring the 
+  output_siso to the input_siso.
+. Components that do need input flow control can OR their input flow control with the external flow control
+  and wire that to the input_siso.
 
 
 $RADIOHDL_WORK/applications/lofar2/doc/prestudy/
-- 
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