Dual purpose PCI-X DDR configurable terminator/driver
AssigneeLSI Logic Corporation
InventorFrank Gasparik
Life of this patent
Estimating the term…
Abstract
A dual purpose PCI-X DDR configurable terminator/driver providing programmable termination of the interface in a PCI-X system a plurality of N-channel devices divided into at least two groups and a plurality of P-channel devices also divided into at least two groups. A driver control individually controls selected ones of the groups of N-channel and P-channel devices on or off for providing internal termination to the transmission line. The configurable PCI-X DDR driver/terminator is configurable in three termination modes: pull-up mode, pull-down mode, and symmetric mode.
Claims23
A PCI-X DDR driver for providing internal termination to a transmission line, comprising:
- a driver control;
- a plurality of N-channel devices, the plurality of N-channel devices being divided into at least two groups;
- and
- a plurality of P-channel devices, the plurality of P-channel devices being divided into at least two groups,
- wherein the driver control is suitable for individually controlling selected ones of the groups of N-channel and P-channel devices on or off for providing internal termination to the transmission line.
A PCI-X DDR system, comprising:
- a transmission line;
- and
- driver for providing internal termination to the transmission line, the driver including:
- a driver control;
- a plurality of N-channel devices, the plurality of N-channel devices being divided into at least two groups;
- and
- a plurality of P-channel devices, the plurality of P-channel devices being divided into at least two groups,
- wherein the driver control is suitable for individually controlling selected ones of the groups of N-channel and P-channel devices on or off for providing internal termination to the transmission line.
A PCI-X DDR driver for providing internal termination to a transmission line, comprising:
- a plurality of N-channel devices, the plurality of N-channel devices being divided into at least two groups;
- a plurality of P-channel devices, the plurality of P-channel devices being divided into at least two groups;
- means for individually controlling the groups of N-channel and P-channel devices;
- wherein the controlling means is suitable for individually controlling selected ones of the groups of N-channel and P-channel devices on or off for providing internal termination to the transmission line.
Dependencies are inferred from the claim text.