Input/output circuit and method of semiconductor apparatus and system with the same
AssigneeSK hynix Inc.
InventorKwang Hyun Kim
Life of this patent
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Abstract
A system includes a controller which is capable of operating at one of a first speed and a second speed slower than the first speed; a semiconductor memory apparatus operating at the first speed; and an input/output device which is connected between the semiconductor memory apparatus and the controller, and configured to control input/output of signals between the controller and the semiconductor memory apparatus, wherein the input/output device operates in a normal mode which corresponds to the input/output of the signals between the controller operating at the first speed and the semiconductor memory apparatus and a test mode which corresponds to the input/output of the signals between the controller operating at the second speed and the semiconductor memory apparatus.
Claims13
An output method of a semiconductor apparatus, comprising the steps of:
- (a) generating a first data group based on data applied to a plurality of input lines;
- (b) generating a second data group to be the same as the first data group, based on the data applied to the plurality of input lines;
- (c) outputting at least a portion of the first data group at a first timing;
- and
- (d) outputting at least a portion of the second data group at a second timing after the first timing.
Dependencies are inferred from the claim text.