| HD | HP |
|---|---|
| N/A | Available |
Class-I drivers can be preferred for short, point-to-point board topologies. DCI provides tuned internal parallel split-termination resistors that are always present. The value of the ODT attributes represents the Thevenin equivalent resistance of R (where R = Z0) to the VCCO/2 mid-point level. The source termination feature (OUTPUT_IMPEDANCE) provides the option of 40 Ω, 48 Ω, or 60 Ω tuned driver impedance in HP I/O banks. The driver output impedance is set to a default of 40 Ω. The differential (DIFF_) version uses complementary single-ended drivers for outputs, and differential receivers for inputs.