Visible to Intel only — GUID: sam1412833606516
Ixiasoft
Visible to Intel only — GUID: sam1412833606516
Ixiasoft
5.1.3. LVDS SERDES Intel® FPGA IP Receiver Settings
Parameter | Value | Description |
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Enable bitslip mode |
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Turn on to add a bit slip block to the receiver data path and expose the rx_bitslip_ctrl port (one input per channel). Every assertion of the rx_bitslip_ctrl signal adds one bit of serial latency to the data path of the specified channel. |
Enable rx_bitslip_reset port |
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Turn on to expose the rx_bitslip_reset port (one input per channel) that you can use to reset the bit slip. |
Enable rx_bitslip_max port |
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Turn on to expose the rx_bitslip_max port (one output per channel). When asserted, the next rising edge of rx_bitslip_ctrl resets the latency of the bit slip to zero. |
Bitslip rollover value | Deserialization factor | Specifies the maximum latency that the bit slip can inject. When the bit slip reaches the specified value, it rolls over and the rx_bitslip_max signal asserts. The rollover value is set automatically to the deserialization factor. |
Parameter | Value | Description |
---|---|---|
Enable rx_dpa_reset port |
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Turn on to expose the rx_dpa_reset port that you can use to reset the DPA logic of each channel independently. (Formerly known as rx_reset.) |
Enable rx_fifo_reset port |
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Turn on to use your logic to drive the rx_fifo_reset port to reset the DPA-FIFO block. |
Enable rx_dpa_hold port |
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Turn on to expose the rx_dpa_hold input port (one input per channel). If set high, the DPA logic in the corresponding channel does not switch sampling phases. (Formerly known as rx_dpll_hold.) |
Enable DPA loss of lock on one change |
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Deassertion of rx_dpa_locked does not indicate that the data is invalid. Instead, the deassertion indicates that the DPA has changed phase taps to track variations between the inclock and rx_in data. Intel recommends that you use data checkers to verify data accuracy. |
Enable DPA alignment only to rising edges of data |
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Note: Intel recommends that you use this port only for high jitter systems and turn it off for typical applications.
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(Simulation only) Specify PPM drift on the recovered clock(s) | — | Specifies the amount of phase drift the LVDS SERDES IP simulation model adds to the recovered rx_divfwdclks.
Note: The current release of the Quartus® Prime software does not support this feature.
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Parameter | Value | Description |
---|---|---|
Desired receiver inclock phase shift (degrees) | — | Specifies, in degrees of the LVDS fast clock, the ideal phase delay of inclock with respect to transitions in the incoming serial data. For example, specifying 180° implies that the inclock is center aligned to the incoming data. |
Actual receiver inclock phase shift (degrees) | Depends on the fast_clock and inclock frequencies. Refer to the related information. |
Specifies the closest achievable receiver inclock phase shift to the desired receiver inclock phase shift. |