AR# 44215

7 Series Integrated Wrapper for LogiCORE CPRI - v4.1- Should the transceiver transmit and receive elastic buffers be enabled?

描述

Should the transceiver transmit and receive elastic buffers should be enabled?For more information, please see(Xilinx Answer 43244).

解决方案

To enable the transceiver transmit and receive elastic buffers:

  • Set RXBUF_EN to "TRUE" in the <component_name>/example_design/gtx_and_clocks/gtx/v7_gtwizard_gt.vhd file.
  • Set TXBUF_EN to "TRUE" in the <component_name>/example_design/gtx_and_clocks/gtx/v7_gtwizard_gt.vhd file.
  • In the same file, set RX_XCLK_SEL to "RXREC" .
  • In the same file, set TX_XCLK_SEL to "TXOUT".
  • In addition, disable the transmit and receive phase alignment.

Set the RX Elastic Buffer and Phase Alignment Ports section of <component_name>/example_design/gtx_and_clocks/gtx/v7_gtwizard_gt.vhd to:

-------- Receive Ports - RX Elastic Buffer and Phase Alignment Ports -------

RXBUFRESET => tied_to_ground_i,
RXBUFSTATUS => open,
RXDDIEN => tied_to_ground_i,
RXDLYBYPASS => tied_to_vcc_i,
RXDLYEN => tied_to_ground_i,
RXDLYOVRDEN => tied_to_ground_i,
RXDLYSRESET => tied_to_ground_i,
RXDLYSRESETDONE => open,
RXPHALIGN => tied_to_ground_i,
RXPHALIGNDONE => open,
RXPHALIGNEN => tied_to_ground_i,
RXPHDLYPD => tied_to_ground_i,
RXPHDLYRESET => tied_to_ground_i,
RXPHMONITOR => open,
RXPHOVRDEN => tied_to_ground_i,
RXPHSLIPMONITOR => open,
RXSTATUS => open,

Set the TX Elastic Buffer and Phase Alignment Ports section of the same file to:

----------- Transmit Ports - TX Elastic Buffer and Phase Alignment ---------

TXBUFSTATUS => open,
TXDLYBYPASS => tied_to_vcc_i,
TXDLYEN => tied_to_ground_i,
TXDLYHOLD => tied_to_ground_i,
TXDLYOVRDEN => tied_to_ground_i,
TXDLYSRESET => tied_to_ground_i,
TXDLYSRESETDONE => open,

For more information, see the LogiCORE CPRI Release Notes and Known Issues (Xilinx Answer 36969).

链接问答记录

主要问答记录

Answer Number 问答标题 问题版本 已解决问题的版本
36969 LogiCORE IP CPRI - Release Notes and Known Issues N/A N/A

相关答复记录

AR# 44215
日期 08/28/2012
状态 Archive
Type 已知问题
IP