diff --git a/libraries/dsp/st/src/vhdl/mms_st_histogram.vhd b/libraries/dsp/st/src/vhdl/mms_st_histogram.vhd
index 372f5187091d077d31a483556dbfb94ac2b4360d..8472efc40742fd61e77675a888cf84c742b56def 100644
--- a/libraries/dsp/st/src/vhdl/mms_st_histogram.vhd
+++ b/libraries/dsp/st/src/vhdl/mms_st_histogram.vhd
@@ -26,7 +26,7 @@
 --   mms_st_histogram couples the st_histogram component which works entirely
 --   in the dp clock domain through st_histogram_reg that handles the cross
 --   domain conversion to the MM bus.
---
+--   
 --
 --             --------------------------------------
 --             | mms_st_histogram                   |
diff --git a/libraries/dsp/st/src/vhdl/st_histogram.vhd b/libraries/dsp/st/src/vhdl/st_histogram.vhd
index 4177fdd6c43189ed20f8075d5abe46372fae8057..49f9da8e02a1ad45e1bdd428fa56138ce8c75cbe 100644
--- a/libraries/dsp/st/src/vhdl/st_histogram.vhd
+++ b/libraries/dsp/st/src/vhdl/st_histogram.vhd
@@ -67,7 +67,7 @@
 --     read/write limitation and writing takes priority in this case
 --   . When a sync signal appears the RAM has to be swapped 2 cycles later so 
 --     the first 2 cycles may not be read from the old RAM block 
--- 
+--   
 -------------------------------------------------------------------------------
 
 LIBRARY IEEE, common_lib, mm_lib, technology_lib, dp_lib;
diff --git a/libraries/dsp/st/src/vhdl/st_histogram_8_april.vhd b/libraries/dsp/st/src/vhdl/st_histogram_8_april.vhd
index 965564ea25c13c9cf8c3ca7feaf62bd5c7b1593b..c3ff7ed4940c9e0bac5fdb559ad66a360be245bc 100644
--- a/libraries/dsp/st/src/vhdl/st_histogram_8_april.vhd
+++ b/libraries/dsp/st/src/vhdl/st_histogram_8_april.vhd
@@ -101,6 +101,7 @@ BEGIN
   -- . out : bin_reader_mosi (latency: 0)
   -- . out : bin_reader_mosi_pp (latency: 2)
   -- - out : rd_cnt_allowed_pp  (latency: 2)
+  -- . out : dp_pipeline_src_out_pp (latency: 2)
   -----------------------------------------------------------------------------
   bin_reader_mosi.rd                          <= snk_in.valid; -- when 1, count allowed
   bin_reader_mosi.address(c_adr_w-1 DOWNTO 0) <= snk_in.data(g_in_data_w-1 DOWNTO c_adr_low); 
diff --git a/libraries/dsp/st/src/vhdl/st_histogram_reg.vhd b/libraries/dsp/st/src/vhdl/st_histogram_reg.vhd
index 98424485a4e1ca3439959fe4098c2b610cf9aa4e..94b5895787d93f9e24bba470440a8a18b13e70a6 100644
--- a/libraries/dsp/st/src/vhdl/st_histogram_reg.vhd
+++ b/libraries/dsp/st/src/vhdl/st_histogram_reg.vhd
@@ -76,7 +76,7 @@ ARCHITECTURE str OF st_histogram_reg IS
 --                                  adr_w    => 1,
 --                                  dat_w    => c_word_w,
 --                                  nof_dat  => 1,
---                                  init_sl  => g_default_value);
+--                                  init_sl  => g_default_value);  
 
   
 BEGIN 
diff --git a/libraries/dsp/st/tb/vhdl/tb_mms_st_histogram.vhd b/libraries/dsp/st/tb/vhdl/tb_mms_st_histogram.vhd
index 8c74592e65fa4a7776fe01c12e73c17808437444..fbb57a6c0ff7b8c3037c3adad36ed70083133620 100644
--- a/libraries/dsp/st/tb/vhdl/tb_mms_st_histogram.vhd
+++ b/libraries/dsp/st/tb/vhdl/tb_mms_st_histogram.vhd
@@ -105,7 +105,7 @@ BEGIN
   
   
   ----------------------------------------------------------------------------
-  -- Source: counter stimuli
+  -- Source: counter stimuli 
   ----------------------------------------------------------------------------
   
   p_data : PROCESS(dp_rst, dp_clk, st_histogram_snk_in)
diff --git a/libraries/dsp/st/tb/vhdl/tb_st_histogram.vhd b/libraries/dsp/st/tb/vhdl/tb_st_histogram.vhd
index e997850df3698990fdbd06a4a0badc7598ac386b..36a9f7a16dc67b26dc57120b94ee2327f96428ba 100644
--- a/libraries/dsp/st/tb/vhdl/tb_st_histogram.vhd
+++ b/libraries/dsp/st/tb/vhdl/tb_st_histogram.vhd
@@ -122,7 +122,7 @@ BEGIN
   
   ----------------------------------------------------------------------------
   -- Source: stimuli
-  --  st_histogram_snk_in.data    counter or toggle stimuli
+  --  st_histogram_snk_in.data    counter or toggle or same_rw stimuli
   --                     .valid   with or without gap's in valid stimuli
   --                     .sync    sync stimuli
   ----------------------------------------------------------------------------