Reduced-Swing Differential Signal (RSDS)

RSDS is similar to an LVDS high-speed interface using differential signaling, but with a smaller voltage swing and requiring a parallel termination resistor. RSDS is only intended for point-to-point applications. For more information about RSDS Voltage Swing, see respective PolarFire FPGA Datasheet or PolarFire SoC Advance Datasheet.

While GPIO supports RSDS receive and transmit modes, HSIO supports RSDS receive mode with an external 100 Ω on-board termination.