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pmd_io: Switch to single-ended tx signal 

The singal-ended to differential conversion will be done by the
transceiver (by the ECL interface circuit).

Signed-off-by: Sean Anderson <seanga2@gmail.com>
This commit is contained in:
Sean Anderson 2022-10-16 17:42:17 -04:00
parent ab341eca0e
commit 2832c79ff0
1 changed files with 4 additions and 16 deletions
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20
rtl/pmd_io.v
View File

@ -19,8 +19,8 @@ module pmd_io (
input rx_clk_125,
input signal_detect,
output reg tx_p, tx_n,
input rx,
output reg tx,
/* PMD */
output signal_status,
@ -187,26 +187,14 @@ module pmd_io (
`ifdef SYNTHESIS
SB_IO #(
.PIN_TYPE(`PIN_OUTPUT_ALWAYS | `PIN_OUTPUT_REGISTERED),
.IO_STANDARD("SB_LVDS_INPUT")
) data_txp_pin (
.PACKAGE_PIN(tx_p),
.OUTPUT_CLK(rx_clk_125),
.D_OUT_0(pmd_data_tx)
);
SB_IO #(
.PIN_TYPE(`PIN_OUTPUT_ALWAYS | `PIN_OUTPUT_REGISTERED_INVERTED),
.IO_STANDARD("SB_LVDS_INPUT")
) data_txn_pin (
.PACKAGE_PIN(tx_n),
.PACKAGE_PIN(tx),
.OUTPUT_CLK(rx_clk_125),
.D_OUT_0(pmd_data_tx)
);
`else
always @(posedge tx_clk) begin
tx_p <= pmd_data_tx;
tx_n <= ~pmd_data_tx;
end
always @(posedge tx_clk)
tx <= pmd_data_tx;
`endif
`ifndef SYNTHESIS