The following table lists the differential I/O standards supported by the XC3S1500-4FG676C device.
| Imagecaption |
|---|
Table 1. Supported differential I/O standards. |
|
| ||||
|---|---|---|---|---|---|
BLVDS_25 | Bus Low-Voltage Differential Signaling (2.5V) | ||||
DIFF_HSTL_II_18 | Differential High-Speed Transceiver Logic (1.8V) Class II | ||||
DIFF_SSTL2_II | Differential Stub Series Terminated Logic (2.5V) Class II | ||||
LDT_25 | Lightning Data Transport (2.5V) | ||||
LVDS_25 | Low-Voltage Differential Signaling (2.5V) | ||||
LVDSEXT_25 | Extended Low-Voltage Differential Signaling (2.5V) | ||||
LVPECL_25 | Low-Voltage Positive Emitter-Coupled Logic (2.5V) | ||||
RSDS_25 | Reduced Swing Differential Signaling (2.5V) |
Notes
DCI (Digitally Controlled Impedance) option is available in each case, with the exception of the following:
- BLVDS_25
- LDT_25
- LVPECL_25
- RSDS_25
For more detailed information, refer to the Spartan-3 Generation FPGA User Guide (ug331.pdf), available at www.xilinx.com.