The following table lists the differential DCI (Digitally Controlled Impedance) I/O standards supported by the XC4VLX25-10FF668C device.
Table 1. Supported differential DCI I/O standards.| I/O Standard |
Description |
|---|---|
DIFF_HSTL_II_DCI |
Differential High-Speed Transceiver Logic (1.5V) Class II with Digitally Controlled Impedance technology |
DIFF_HSTL_II_18_DCI |
Differential High-Speed Transceiver Logic (1.8V) Class II with Digitally Controlled Impedance technology |
DIFF_SSTL18_II_DCI |
Differential Stub Series Terminated Logic (1.8V) Class II with Digitally Controlled Impedance technology |
DIFF_SSTL2_II_DCI |
Differential Stub Series Terminated Logic (2.5V) Class II with Digitally Controlled Impedance technology |
LVDS_25_DCI |
Low-Voltage Differential Signaling (2.5V) with Digitally Controlled Impedance Technology |
LVDSEXT_25_DCI |
Extended Low-Voltage Differential Signaling (2.5V) with Digitally Controlled Impedance Technology |
For more information, refer to the Virtex-4 FPGA User Guide (ug070.pdf), available at www.xilinx.com.
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