In Push-Pull mode (selected by the SIP parameter SysPushPull asserted), ZN is tied to VCC_CORE with a resistor that has a resistance matching the impedance Z0 of the transmission line. ZP is tied to VSS with a resistor that has a resistance matching the impedance Z0 of the transmission line. Pin Descriptions Chapter 11 Preliminary Information 25175H—March 2003 AMD Athlon™ XP Processor Model 8 Data Sheet Ordering Information This section provides the ordering information for the AMD Athlon™ XP pr