Self burn-in circuit for semiconductor memory
AssigneeHyundai Electronics Industries Co., Ltd.
InventorsSam-Soo Kim, Young-Hyun Jun
Life of this patent
Estimating the term…
Abstract
An improved self burn-in circuit for a semiconductor memory generates a control signal, an address, and a test data for a burn-in test operation when a certain self burn-in test condition is satisfied. The burn-in circuit includes a burn-in detector for generating a control signal, an address signal, and a test data for a burn-in test operation when a self burn-in test condition is achieved. A memory array performs a burn-in test operation when the test data is written into and/or read from a memory cell which is selected by the address signal in accordance with the control signal.
Claims17
A self burn-in circuit for a semiconductor memory, comprising:
- a burn-in detector circuit for generating a control signal, an address signal, and a test data for a burn-in test operation when said burn-in detector circuit detects a burn-in test condition;
- and
- a memory array for performing the burn-in test operation when said test data is at least one of written into and read from a memory cell which is selected by said address signal in accordance with said control signal, wherein said self burn-in circuit further includes a data comparator for comparing a test data read from said memory array with the test data outputted from said burn-in detector circuit, and wherein said burn-in detector circuit includes:
- a burn-in detector for generating a self burn-in test signal when the burn-in test condition is detected,
- a pulse generator for generating a clock pulse in accordance with the self burn-in test signal applied thereto,
- an address counter for generating the address signal using a clock pulse in accordance with the self burn-in test signal applied thereto,
- a control signal generator for generating RAS, CAS, write enable signal and read enable signal using the clock pulse signal and the address signal in accordance with the self burn-in test signal applied thereto, and
- a data generator for reading the test data from the address signal and for outputting the read data to the data comparator in accordance with the self burn-in test signal from said burn-in detector.
A memory device comprising:
- a memory array having a plurality of memory cells;
- means for at least one of reading data from and writing data into each memory cell of said memory array;
- a burn-in detector circuit for detecting a burn-in test operation, said burn-in detector circuit generating an address signal which is applied to said means for at least one of reading data from and writing data into a memory cell corresponding to said address signal when said burn-in test operation is detected, wherein said burn-in detector circuit includes:
- a burn-in detector detecting the burn-in test operation and generating a burn-in test signal,
- a pulse generator for generating a clock signal, and
- an address counter coupled to said burn-in detector and said pulse generator such that said address counter generates said address signal.
Dependencies are inferred from the claim text.