High-Speed Current Steering Logic (HCSL)

HCSL is a differential output standard used in PCI Express applications. Both GPIO and HSIO support the HCSL I/O standards (receive-only mode). Although, the common mode range for this standard is from 250 mV to 550 mV, HCSL I/O receivers support a wider range of 50 mV to 2.4 V.