From f338377108692afa272ca0aa53b647cb5af92cab Mon Sep 17 00:00:00 2001
From: Hadaq in Frankfurt <hadaq@frankfurt>
Date: Thu, 4 Apr 2013 23:23:11 +0200
Subject: [PATCH] Added FF to time-reference signal

---
 cts/trb3_central.vhd | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/cts/trb3_central.vhd b/cts/trb3_central.vhd
index 396d7a6..2af1658 100644
--- a/cts/trb3_central.vhd
+++ b/cts/trb3_central.vhd
@@ -1201,7 +1201,6 @@ gen_TDC : if INCLUDE_TDC = c_YES generate
   THE_TDC : TDC
     generic map (
       CHANNEL_NUMBER => 5,             -- Number of TDC channels
-      STATUS_REG_NR  => 0,
       CONTROL_REG_NR => 2)
     port map (
       RESET                 => reset_i,
@@ -1303,10 +1302,18 @@ end process;
   CLK_MNGR1_USER <= select_tc(19 downto 16);
   CLK_MNGR2_USER <= select_tc(27 downto 24); 
 
+   
+  cts_rdo_trigger <= cts_trigger_out;
 
+process begin
+  -- output time reference synchronously to the 200MHz clock
+  -- in order to reduce jitter
+  wait until rising_edge(clk_200_i);
   TRIGGER_OUT    <= cts_trigger_out;
   TRIGGER_OUT2   <= cts_trigger_out;
-  cts_rdo_trigger <= cts_trigger_out;
+end process;
+  
+  
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-- 
2.43.0