| 摘要 |
A system and method of performing off chip drive (OCD) and on-die termina tion (ODT) are provided A common pull-up network composed of transistors and a common pull-down network composed of transistors are employed to implemen t both of these functions. In drive mode, the pull-up network is configured to produce a calibrated drive impedance when an "on" output is to be generat ed, and the pull-down network is configured to produce a calibrated drive im pedance when an "off" output is to be generated. In termination mode, the pu ll- up network and the pull-down network are configured to produce a calibra ted pull-up resistance and pull-down resistance, respectively, such that tog ether they form a split termination. |
