diff --git a/lib/lpp/lfr_time_management/apb_lfr_time_management.vhd b/lib/lpp/lfr_time_management/apb_lfr_time_management.vhd
--- a/lib/lpp/lfr_time_management/apb_lfr_time_management.vhd
+++ b/lib/lpp/lfr_time_management/apb_lfr_time_management.vhd
@@ -266,11 +266,11 @@ BEGIN
 
       tick           => new_timecode,
       new_coarsetime => new_coarsetime,
-      coarsetime_reg => coarsetime_reg(30 DOWNTO 0),
+      coarsetime_reg => coarsetime_reg(31 DOWNTO 0),
 
       fine_time       => fine_time_49,
       fine_time_new   => fine_time_new_49,
       coarse_time     => coarse_time_49,
       coarse_time_new => coarse_time_new_49);
 
-END Behavioral;
\ No newline at end of file
+END Behavioral;
diff --git a/lib/lpp/lfr_time_management/coarse_time_counter.vhd b/lib/lpp/lfr_time_management/coarse_time_counter.vhd
--- a/lib/lpp/lfr_time_management/coarse_time_counter.vhd
+++ b/lib/lpp/lfr_time_management/coarse_time_counter.vhd
@@ -15,7 +15,7 @@ ENTITY coarse_time_counter IS
     
     tick          : IN STD_LOGIC;
     set_TCU       : IN STD_LOGIC;
-    set_TCU_value : IN STD_LOGIC_VECTOR(30 DOWNTO 0);
+    set_TCU_value : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
     CT_add1       : IN STD_LOGIC;
     fsm_desync    : IN STD_LOGIC;
     FT_max        : IN STD_LOGIC;
@@ -34,6 +34,9 @@ ARCHITECTURE beh OF coarse_time_counter 
   SIGNAL coarse_time_new_counter : STD_LOGIC;
   SIGNAL coarse_time_31 : STD_LOGIC;
   SIGNAL coarse_time_31_reg : STD_LOGIC;
+
+  SIGNAL set_synchronized       : STD_LOGIC;
+  SIGNAL set_synchronized_value : STD_LOGIC_VECTOR(5 DOWNTO 0);
   
   --CONSTANT NB_SECOND_DESYNC : INTEGER := 4; -- TODO : 60 
 BEGIN  -- beh
@@ -48,12 +51,17 @@ BEGIN  -- beh
       RST_VALUE => (OTHERS => '0'),
       MAX_VALUE => "111" & X"FFFFFFF" ,
       set       => set_TCU,
-      set_value => set_TCU_value,
+      set_value => set_TCU_value(30 DOWNTO 0),
       add1      => CT_add1,
       counter   => coarse_time(30 DOWNTO 0));
 
   
   add1_bit31 <= '1' WHEN fsm_desync = '1' AND FT_max = '1' ELSE '0';
+
+  
+  set_synchronized       <= (tick AND (NOT coarse_time_31)) OR (coarse_time_31 AND set_TCU);
+  set_synchronized_value <= STD_LOGIC_VECTOR(to_unsigned(NB_SECOND_DESYNC, 6)) WHEN (set_TCU AND set_TCU_value(31)) =  '1' ELSE
+                            (OTHERS => '0');
   
   counter_2 : general_counter
     GENERIC MAP (
@@ -64,8 +72,8 @@ BEGIN  -- beh
       rstn      => rstn,
       RST_VALUE => STD_LOGIC_VECTOR(to_unsigned(NB_SECOND_DESYNC, 6)),
       MAX_VALUE => STD_LOGIC_VECTOR(to_unsigned(NB_SECOND_DESYNC, 6)),
-      set       => tick,
-      set_value => (OTHERS => '0'),
+      set       => set_synchronized,
+      set_value => set_synchronized_value,
       add1      => add1_bit31,
       counter   => nb_second_counter);
 
diff --git a/lib/lpp/lfr_time_management/lfr_time_management.vhd b/lib/lpp/lfr_time_management/lfr_time_management.vhd
--- a/lib/lpp/lfr_time_management/lfr_time_management.vhd
+++ b/lib/lpp/lfr_time_management/lfr_time_management.vhd
@@ -34,7 +34,7 @@ ENTITY lfr_time_management IS
     tick           : IN STD_LOGIC;      -- transition signal information
     
     new_coarsetime : IN STD_LOGIC;      -- transition signal information
-    coarsetime_reg : IN STD_LOGIC_VECTOR(30 DOWNTO 0);
+    coarsetime_reg : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
 
     fine_time       : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
     fine_time_new   : OUT STD_LOGIC;
diff --git a/lib/lpp/lfr_time_management/lpp_lfr_time_management.vhd b/lib/lpp/lfr_time_management/lpp_lfr_time_management.vhd
--- a/lib/lpp/lfr_time_management/lpp_lfr_time_management.vhd
+++ b/lib/lpp/lfr_time_management/lpp_lfr_time_management.vhd
@@ -57,7 +57,7 @@ PACKAGE lpp_lfr_time_management IS
       rstn            : IN  STD_LOGIC;
       tick            : IN  STD_LOGIC;
       new_coarsetime  : IN  STD_LOGIC;
-      coarsetime_reg  : IN  STD_LOGIC_VECTOR(30 DOWNTO 0);
+      coarsetime_reg  : IN  STD_LOGIC_VECTOR(31 DOWNTO 0);
       fine_time       : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
       fine_time_new   : OUT STD_LOGIC;
       coarse_time     : OUT STD_LOGIC_VECTOR(31 DOWNTO 0);
@@ -72,7 +72,7 @@ PACKAGE lpp_lfr_time_management IS
       rstn            : IN  STD_LOGIC;
       tick            : IN  STD_LOGIC;
       set_TCU         : IN  STD_LOGIC;
-      set_TCU_value   : IN  STD_LOGIC_VECTOR(30 DOWNTO 0);
+      set_TCU_value   : IN  STD_LOGIC_VECTOR(31 DOWNTO 0);
       CT_add1         : IN  STD_LOGIC;
       fsm_desync      : IN  STD_LOGIC;
       FT_max          : IN  STD_LOGIC;