Fuse data reading circuit having multiple reading modes and related devices, systems and methods

摘要

A fuse data reading circuit is configured to read fuse data in multi-reading modes. The fuse data may be stored in a fuse array that includes a plurality of fuse cells configured to store fuse data. The fuse data reading circuit may include a sensing unit configured to sense the fuse data stored in the fuse cells of the fuse array, and a controller configured to control an operation of reading the fuse data stored in the fuse cells. The controller sets different sensing conditions for sensing the fuse data according to an operation period during the fuse data reading operation to read the fuse data. Methods include operations and use of the fuse data reading circuit.

主权项

1. A fuse data reading circuit comprising:
a fuse array including a plurality of fuse cells configured to store fuse data; a sensing circuit configured to sense the fuse data stored in the fuse cells of the fuse array; and a controller configured to control reading of the fuse data stored in the fuse cells, the controller being configured to read out of the fuse array first data of the fuse data with a first reading mode having first fuse data sensing conditions during a transition period and to read out of the fuse array second data of the fuse data with a second reading mode having second fuse data sensing conditions during a stabilized period, wherein the second fuse data sensing conditions are different from the first fuse data sensing conditions, and the controller is configured to select the first reading mode and second reading mode sequentially in accordance with time lapse after the enabling of the fuse data reading circuit, wherein the first fuse data sensing conditions cause higher sensitivity for sensing the fuse data during the transition period as compared to sensitivity for sensing the fuse data during the stabilized period caused by the second fuse data sensing conditions.