摘要:
A low-density parity-check decoder in a system with multi-level cells identifies zones of reliability where write errors or stuck cells are identifiable. The system uses assumedly successfully decoded pages associated with bits in a cell to identify candidate write errors or stuck cells and erases a corresponding log-likelihood ratio even where such log-likelihood ratio is saturated, thereby breaking a potential trapping set without post-processing.
摘要:
A system for testing a device under test (DUT) includes a test controller unit that includes a first memory operable to store a data pattern; a bridge circuit that includes a second memory that is smaller than the first memory, and a functional unit that includes a third memory that is smaller than the second memory. Portions of the data pattern are selectively transferred from the first memory to the second memory during and for DUT testing operations. The functional circuit interfaces with the DUT for testing. Portions of the data pattern are selectively transferred from the second memory to the third memory for application to the DUT.
摘要:
According to one embodiment, an electromagnet includes a first electromagnet coil having a first portion and a second portion. The first portion of the first electromagnet coil extends in a direction in parallel with a first plane. The second portion of the first electromagnet coil extends in a direction in parallel with a second plane. The first and second planes intersect at a predetermined angle.
摘要:
The invention relates to a method for detecting a subroutine call stack modification, including the steps of, when calling a subroutine, placing a return address at the top of the stack; at the end of the subroutine, using the address at the top of the stack as the return address, and removing the address from the stack; when calling the subroutine, accumulating the return address in a memory location with a first operation; at the end of the subroutine, accumulating the address from the top of the stack in the memory location with a second operation, reciprocal of the first operation; and detecting a change when the content of the memory location is different from its initial value.
摘要:
To measure an inner temperature of a chamber included in a test handler, self-refresh currents of semiconductor memory devices under test are measured. The semiconductor memory devices are disposed in the chamber and have a function of linear temperature compensated self-refresh (Li-TCSR). Local temperature values are generated based on the self-refresh currents, where each local temperature value indicates a temperature near the corresponding semiconductor memory device of the semiconductor memory devices under test.
摘要:
Apparatuses and methods for compressing data responsive to a plurality of memory accesses is described. An example compression circuit includes a comparator configured to compare data provided by a group of memory cells associated with a repair address. Each subset of one or more bits of the data is sequentially provided by the group of memory cells responsive to a respective memory access of a plurality of memory accesses. The example compression circuit further including an error bit latch coupled to the comparison circuit. The error bit latch configured to, responsive to an output received from the comparison circuit indicating an error, compress the data to an error bit by setting the error bit to an error detected state and latching the error bit having the error detected state.
摘要:
According to the embodiments, there are provided semiconductor memories that are mounted individually on two sides of a mounting board; a controller that is mounted either on an obverse side or a reverse side of the mounting board, and performs read and write control of the semiconductor memories; and a connector that is deviated in a lateral direction from the controller so as not to overlap the controller, is mounted either on the obverse side or the reverse side of the mounting board, and transfers a signal exchanged between the controller and outside.
摘要:
A tristate inverter array test structure and method of testing structures in a microchip are disclosed. The structure includes: a PFET stack in series with an NFET stack; an inverted wordline driving a PFET of the PFET stack; a worldline driving an NFET of the NFET stack; a data_in line connecting to an input of the PFET stack and the NFET stack; and a data_out line connecting to an output of the PFET stack and the NFET stack.
摘要:
An automatic test equipment includes a test apparatus, a first control device, a first assisting device, and a second control device. The test apparatus is applied for testing a first object, wherein the test apparatus has a first cover. The first control device has an activating device. The first assisting device is electrically connected to the first control device. The second control device is electrically connected to the first control device and the test apparatus. When the activating device is activated, the first control device controls the first assisting device to lower the first cover and then the first control device transmits a first control signal to the second control device for allowing the test apparatus to test the first object.
摘要:
In accordance with the present disclosure, a dynamic random access memory (DRAM) component is described. The DRAM component may comprise an integrated circuit, with the integrated circuit including an array of volatile memory cells. A first volatile memory cells of the array of volatile memory cells may be defective. The integrated circuit may also include non-volatile memory, and the non-volatile memory may contain a reference to the first volatile memory cell.