The differential (DIFF_) versions (DIFF_POD10 and DIFF_POD12) use complementary single-ended drivers for outputs, and differential receivers for inputs. Optional untuned split input ODT provides pull-up to VCCO. The untuned on-die source termination feature (OUTPUT_IMPEDANCE) provides the option of 40W, 48W, or 60W of driver impedance in HP I/O banks. The driver output impedance is set to a default of 40W. POD12 standards also have optional EQUALIZATION and OFFSET_CNTRL features in the receivers and PRE_EMPHASIS in the drivers.