
Signal Clock Domain Direction Description
jesd204_rx_link_
data_valid
rxlink_clk Input
Indicates whether the jesd204_rx_link_
datain[] is valid or invalid.
• 0—jesd204_rx_link_datain[] is invalid
• 1—jesd204_rx_link_datain[] is valid
Connect this signal to the RX DLL jesd204_rx_
link_valid output pin.
jesd204_rx_link_
data_ready
rxframe_clk Output
Indicates that the transport layer is ready to
sample jesd204_rx_link_datain[].
• 0—transport layer is not ready to sample
jesd204_rx_link_datain[]
• 1—transport layer starts sampling jesd204_
rx_link_datain[] at the next clock cycle.
Connect this signal to the RX DLL jesd204_rx_
link_ready input pin.
jesd204_rx_link_
error
rxlink_clk Output
Indicates an empty data stream due to invalid
data. This signal is asserted high to indicate an
error at the Avalon-ST sink interface (for
example, when jesd204_rx_data_valid = "1"
while jesd204_rx_data_ready = "0"). The DLL
subsequently reports this error to the CSR block.
Connect this signal to the RX DLL jesd204_rx_
frame_error input pin.
Signal Clock Domain Direction Description
CSR in DLL
5-28
RX Path
UG-01142
2015.05.04
Altera Corporation
JESD204B IP Core Design Guidelines
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