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US 7,064,989 B2Granted
On-die termination control circuit and method of generating on-die termination control signal
AssigneeHynix Semiconductor Inc.
InventorsGwang Jin Na, Young Bae Choi
Life of this patent
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Abstract
Provided is directed to an on-die termination control circuit and a method for generating an on-die termination control signal, and the circuit and the method are capable of performing an optimized termination operation during data input and output, by generating a control signal during read and write operations and then controlling the termination circuit to differentiate an impedance of the termination circuit.
Claims12
An on-die termination control circuit, comprising:
- an output enable signal generator for sequentially generating a plurality of output enable signals of a single pulse by a predetermined interval;
- an output enable signal selector for selecting two signals among the plurality of output enable signals as first and second selected signals according to a column address strobe (CAS) latency and then outputting the first and second selected signals;
- and
- a termination control signal generator for generating a termination control signal which has different levels for read and write operations, respectively, according to the first and second selected signals.
1 more element
A method for generating an on-die termination control signal, comprising the steps of:
- sequentially generating a plurality of output enable signals in the form of one pulse;
- selecting two output enable signals, among the plurality of output enable signals according to a CAS latency;
- and
- generating a termination control signal which has different levels for a read operation and a write operation according to the two output enable signals selected by the CAS latency.
1 more element
Dependencies are inferred from the claim text.