System for providing on-die termination of a control signal bus
View Patent ↗A system for providing on-die termination (ODT) of a control signal bus. The system includes a memory device that includes a plurality of data bus connectors, one or both of a load signal connector and a reset signal connector, a control bus connector, an ODT, and a mechanism. The ODT is in communication with the control bus connector, and the ODT provides a level of termination resistance to a control bus connected to the control bus connector. The mechanism latches data received via the data bus connectors in response to a signal received via one or both of the load signal connector and the reset signal connector. The data is utilized to set the level of termination resistance provided by the ODT.
1. A memory device comprising:
a plurality of data bus connectors;
one or both of a load signal connector and a reset signal connector;
a control bus connector;
an on-die terminator (ODT) in communication with the control bus connector, the ODT providing a level of termination resistance to a control bus connected to the control bus connector; and
a mechanism to latch data received via the data bus connectors in response to a signal received via one or both of the load signal connector and the reset signal connector, the data utilized to set the level of termination resistance provided by the ODT.
2. The memory device of claim 1 wherein the memory device includes the load signal connector and the data is latched on an edge of the signal received via the load signal connector.
3. The memory device of claim 2 wherein the edge is a rising edge.
4. The memory device of claim 1 wherein the memory device includes the reset signal connector and the data is latched on an edge of the signal received via the reset signal connector plus a programmable delay.
5. The memory device of claim 4 wherein the edge is a falling edge.
6. The memory device of claim 1 wherein the ODT includes one or more resistors for providing the termination resistance.
7. The memory device of claim 6 wherein the data specifies a resistance level for the resistors.
8. The memory device of claim 6 wherein the data specifies whether each of the resistors should be enabled or disabled.
9. A memory module comprising:
a control bus;
a data bus;
one or both of a load signal and a reset signal; and
a memory device comprising:
a plurality of data bus connectors in communication with the data bus;
one or both of a load signal connector in communication with the load signal and a reset signal connector in communication with the reset signal;
a control bus connector in communication with the control bus;
an on-die terminator (ODT) in communication with the control bus connector, the ODT providing a level of termination resistance to the control bus; and
a mechanism to latch data received via the data bus connectors in response to a signal received via one or both of the load signal connector and the reset signal connector, the data utilized to set the level of termination resistance provided by the ODT.
10. The memory module of claim 9 wherein the memory module includes the load signal, the memory device includes the load signal connector and the data is latched on an edge of the signal received via the load signal connector.
11. The memory module of claim 10 wherein the edge is a rising edge.
12. The memory module of claim 9 wherein the memory module includes the reset signal, the memory device includes the reset signal connector and the data is latched on an edge of the signal received via the reset signal connector plus a programmable delay.
13. The memory module of claim 12 wherein the edge is a falling edge.
14. The memory module of claim 9 wherein the ODT includes one or more resistors for providing the termination resistance.
15. The memory module of claim 14 wherein the data specifies a resistance level for the resistors.
16. The memory module of claim 14 wherein the data specifies whether each of the resistors should be enabled or disabled.