Added a powerdown line to shutdown the noisy MMCMs when external PLL is detected

85dd1047 · Mattia Rizzi · Grzegorz Daniluk · 98089675 · 85dd1047 · 85dd1047
Commit 85dd1047 authored Dec 20, 2016 by Mattia Rizzi Committed by Grzegorz Daniluk Aug 09, 2019
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Showing with 4 additions and 2 deletions

ext_pll_100_to_62m.vhd platform/xilinx/ext_pll_100_to_62m.vhd +2 -1

ext_pll_10_to_100.vhd platform/xilinx/ext_pll_10_to_100.vhd +2 -1

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--- a/platform/xilinx/ext_pll_100_to_62m.vhd
+++ b/platform/xilinx/ext_pll_100_to_62m.vhd
@@ -79,6 +79,7 @@ port
  clk_ext_mul_o          : out    std_logic;
  -- Status and control signals
  rst_a_i             : in     std_logic;
+  powerdown_i         : in     std_logic;
  locked_o            : out    std_logic
 );
 end ext_pll_100_to_62m;
@@ -178,7 +179,7 @@ begin
    LOCKED              => locked_o,
    CLKINSTOPPED        => clkinstopped_unused,
    CLKFBSTOPPED        => clkfbstopped_unused,
-    PWRDWN              => '0',
+    PWRDWN              => powerdown_i,
    RST                 => rst_a_i);

  -- Output buffering

--- a/platform/xilinx/ext_pll_10_to_100.vhd
+++ b/platform/xilinx/ext_pll_10_to_100.vhd
@@ -79,6 +79,7 @@ port
  clk_ext_100_o          : out    std_logic;
  -- Status and control signals
  rst_a_i             : in     std_logic;
+  powerdown_i         : in     std_logic;
  locked_o            : out    std_logic
 );
 end ext_pll_10_to_100;
@@ -178,7 +179,7 @@ begin
    LOCKED              => locked_o,
    CLKINSTOPPED        => clkinstopped_unused,
    CLKFBSTOPPED        => clkfbstopped_unused,
-    PWRDWN              => '0',
+    PWRDWN              => powerdown_i,
    RST                 => rst_a_i);

  -- Output buffering