Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook
5.6.6.7.2. IOPLL Parameter Values for External PLL Mode
| Parameter | outclk0 (Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP transmitter or receiver) | outclk1 (Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP transmitter or receiver) | outclk2 (Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP) | 
|---|---|---|---|
| Frequency | data rate | data rate/serialization factor | data rate/serialization factor | 
| Phase shift | 180° | [(deserialization factor – 1)/deserialization factor] × 360° | 0° | 
| Duty cycle | 50% | 100%/serialization factor | 50% | 
The calculations for phase shift, using the RSKM equation, assume that the input clock and serial data are edge aligned. Introducing a phase shift of 180° to sampling clock (outclk0) ensures that the input data is center-aligned with respect to the outclk0, as shown in the following figure.
| Parameter | outclk0 (Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP transmitter or receiver) | outclk1 (Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP transmitter or receiver) Not required for the soft-CDR receiver. | outclk2 (Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP) | VCO Frequency (Connects as phout[7:0] to the ext_vcoph[7:0] port of LVDS SERDES IP) | 
|---|---|---|---|---|
| Frequency | data rate | data rate/serialization factor | data rate/serialization factor | data rate | 
| Phase shift | 180° | [(deserialization factor – 1)/deserialization factor] × 360° | 0° | — | 
| Duty cycle | 50% | 100%/serialization factor | 50% | — | 
| Parameter | outclk0 (Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP receiver) | outclk1 (Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP receiver) Not required for the soft-CDR receiver. | outclk4 (Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP) | VCO Frequency (Connects as phout[7:0] to the ext_vcoph[7:0] ports of LVDS SERDES IP) | 
|---|---|---|---|---|
| outclk2 (Connects as lvds_clk[1] to the ext_fclk port of LVDS SERDES IP transmitter) | outclk3 (Connects as loaden[1] to the ext_loaden port of LVDS SERDES IP transmitter) | |||
| Frequency | data rate | data rate/serialization factor | data rate/serialization factor | data rate | 
| Phase shift | 180° | [(deserialization factor – 1)/deserialization factor] × 360° | 0° | — | 
| Duty cycle | 50% | 100%/serialization factor | 50% | — |