OpenLDI/FPD-LINK/LVDS Receiver Interface IP
User Guide
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FPGA-IPUG-02021-1.1
2.3.3.
LVDS71 DDR Group Module
LVDS71 DDR group module is used to convert the incoming serial data into parallel format. Output bus width depends
on the DDR gearing set through parameter. For dual channel FPD-Link configuration, two instances of LVDS71 DDR
group are instantiated.
IDDR71B
SCLK
RST
Q0
ALIGNWD
Q1
Q2
Q3
Q4
Q5
Q6
ECLK
D
IDDR71B
SCLK
RST
Q0
ALIGNWD
Q1
Q2
Q3
Q4
Q5
Q6
ECLK
D
IDDR71B
SCLK
RST
Q0
ALIGNWD
Q1
Q2
Q3
Q4
Q5
Q6
ECLK
D
IDDR71B
SCLK
RST
Q0
ALIGNWD
Q1
Q2
Q3
Q4
Q5
Q6
ECLK
D
IDDR71B
SCLK
RST
Q0
ALIGNWD
Q1
Q2
Q3
Q4
Q5
Q6
ECLK
D
clk_phase_o[RX_GEAR-1:0]
d3_o[RX_GEAR-1:0]
lvds71_ddr_group
d2_o[RX_GEAR-1:0]
d1_o[RX_GEAR-1:0]
d0_o[RX_GEAR-1:0]
d3_i
d2_i
d1_i
d0_i
clk_i
alignwd_i
rst_i
eclk_i
sclk_i
Figure 2.17. LVDS71 DDR Group Block Diagram