Abstract:
An integrated circuit includes a high voltage generator generating a high voltage, a negative voltage generator generating a negative voltage, a divided voltage generator generating a divided voltage by dividing the power source voltage and supplying it to a read voltage terminal, a first power gate supplying the high voltage or the divided voltage to a program voltage terminal, a second power gate supplying the negative voltage or the ground voltage to a deactivation voltage terminal, a third power gate supplying the ground voltage or the divided voltage to an activation voltage terminal, and an e-fuse array circuit operating using voltage of the program voltage terminal as a program voltage, voltage of the divided voltage terminal as a read voltage, voltage of the activation voltage terminal as an activation voltage, and voltage of the deactivation voltage terminal as a deactivation voltage.
Abstract:
A memory system includes one or more memory chips, and a repair information storage chip including a nonvolatile memory configured to store a repair information of the one or more memory chips, wherein during an initial operation of the memory system, the repair information stored in the repair information storage chip is transmitted to the one or more memory chips.
Abstract:
A memory device includes a boot-up control unit configured to control a start of boot-up operation by starting the boot-up operation when an initialization signal is activated, and ignore the initialization signal after a complete signal is activated, a nonvolatile memory unit configured to store repair data, and output the stored repair data during the boot-up operation, a plurality of registers configured to store the repair data outputted from the nonvolatile memory unit, a plurality of memory banks configured to replace a normal cell with a redundant cell, using the repair data stored in the corresponding registers among the plurality of resistors, and a verification unit configured to generate the complete signal to notify that the boot-up operation is completed.
Abstract:
A setting information storage circuit includes first decoders configured to generate first input enable signals, respectively, in response to selection codes and a first set signal, first register sets configured to correspond to the first decoders, respectively, and to receive setting data when first input enable signals generated from the first decoders corresponding to the first register sets, respectively, are enabled, and store the received setting data, a second decoders configured to generate a second input enable signals, respectively, in response to the selection codes and a second set signal, and a second register sets configured to correspond to the second decoders, respectively, and to receive the setting data when second input enable signals generated from the second decoders corresponding to the second register sets, respectively, are enabled, and store the received setting data.
Abstract:
A method for testing a memory device includes entering a test mode in which multiple memory banks operate in a same manner, allowing a row corresponding to a row address in the multiple memory banks to be activated, latching a bank address and the row address corresponding to the multiple memory banks, writing same data in a column selected by a column address in the multiple memory banks, reading the data written in the writing of the data from the multiple memory banks, checking whether the data read from the multiple memory banks in the reading of the data are equal to each other, and programming the row address to locations designated by the bank address latched in the latching in a nonvolatile memory when the data read from the multiple memory banks are different from each other.
Abstract:
A memory device includes a boot-up control unit configured to control a start of boot-up operation by starting the boot-up operation when an initialization signal is activated, and ignore the initialization signal after a complete signal is activated, a nonvolatile memory unit configured to store repair data, and output the stored repair data during the boot-up operation, a plurality of registers configured to store the repair data outputted from the nonvolatile memory unit, a plurality of memory banks configured to replace a normal cell with a redundant cell, using the repair data stored in the corresponding registers among the plurality of resistors, and a verification unit configured to generate the complete signal to notify that the boot-up operation is completed.
Abstract:
A method for testing a memory device includes entering a test mode in which multiple memory banks operate in a same manner, allowing a row corresponding to a row address in the multiple memory banks to be activated, latching a bank address and the row address corresponding to the multiple memory banks, writing same data in a column selected by a column address in the multiple memory banks, reading the data written in the writing of the data from the multiple memory banks, checking whether the data read from the multiple memory banks in the reading of the data are equal to each other, and programming the bank address and the row address to a nonvolatile memory when the data read from the multiple memory banks are different from each other.