diff options
Diffstat (limited to 'usrp2/extramfifo/nobl_if.v')
| -rw-r--r-- | usrp2/extramfifo/nobl_if.v | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/usrp2/extramfifo/nobl_if.v b/usrp2/extramfifo/nobl_if.v index 7ff7eaa03..b5ebe9c6b 100644 --- a/usrp2/extramfifo/nobl_if.v +++ b/usrp2/extramfifo/nobl_if.v @@ -39,6 +39,12 @@ module nobl_if assign RAM_LDn = 0; // ZBT/NoBL RAM actually manages its own output enables very well. assign RAM_OEn = 0; + + // gray code the address to reduce EMI + wire [DEPTH-1:0] address_gray; + + bin2gray #(.WIDTH(DEPTH)) bin2gray (.bin(address),.gray(address_gray)); + // // Pipeline stage 1 @@ -62,7 +68,7 @@ module nobl_if if (enable) begin - address_pipe1 <= address; + address_pipe1 <= address_gray; write_pipe1 <= write; // RAM_WEn <= ~write; // Creates IOB flop |