Abstract:
A configuration memory for a programmable logic device (PLD) is described comprising a plurality of memory cells for a configuration memory of a programmable logic device (PLD) each memory cell comprising a storage element and first input means and second input means each being independently operable to provide access to the storage element. The second input means of at least one of the plurality of memory cells is arranged to receive control signals from a test interface for providing test signals to the PLD.
Abstract:
A method of testing a SIP that has a CPU, a nonvolatile memory and a volatile memory. First, the CPU is used to test the memories. Then the CPU is tested separately. Preferably, the programs for testing the memories are pre-stored in and loaded from the nonvolatile memory into the volatile memory and are executed by the CPU in the volatile memory. Preferably, the test results are stored in the nonvolatile memory.
Abstract:
A semiconductor device (10) has a large number of bond pads (24) on the periphery for wirebonding. The semiconductor device (10) has a module (12) as well as other circuitry, but the module (12) takes significantly longer to test than the other circuitry. A relatively small number of the bond pads (20), the module bond pads (20), are required for the module testing due, at least in part, to the semiconductor device having a built-in self-test (BIST) (16) circuitry. The functionality of these module bond pads (22) is duplicated on the top surface of and in the interior of the semiconductor device (10) with module test pads (22) that are significantly larger than the bond pads (24) on the periphery. Having large pads (22) for testing allows longer probe needles, thus increasing parallel testing capability. Duplicating the functionality is achieved through a test pad interface so that the module bond pads (20) and the module test pads (22) do not have to be shorted together.
Abstract:
The present disclosure describes embodiments of a compactor (706) for compressing test results in an integrated circuit (704) and methods for using and designing such embodiments. The disclosed compactors can be utilized, for example, as part of any scan-based design. Moreover, any of the disclosed compactors can be designed, simulated, and/or verified in a computer-executed application, such as an electronic-design-automation ("EDA") software tool. Embodiments of a method for diagnosing faults in the disclosed compactor embodiments are also described.
Abstract:
The invention disclosed herein is a system and method for testing integrated circuit devices, including memory chips. The devices under test are subject to behavioural testing, in which a copy of signals in an application system is directed to the device under test, or to an electronic component connected to the device under test. This permits the device under test to be tested under the operating conditions of the application system, which is preferably similar to the actual application environment in which the device under test will ultimately be used. Conventional tests, including pattern testing and/or parametric tests, may also be performed on devices under test, if desired.
Abstract:
This document describes apparatuses and techniques for integrated DRAM with low-voltage swing I/O. In some aspects, a dynamic random access memory (DRAM) die and application processor (AP) die are mounted to a system-in-package (SiP) die carrier that includes one or more redistribution layers. The DRAM die and AP die are located adjacent to each other on the die-carrier such that respective memory inputs/outputs of each die are proximate the other inputs/outputs.
Abstract:
A method is provided for performing continuous single insertion semiconductor testing of a group of semiconductors that are divided into a first subgroup and a second subgroup at multiple different temperatures. The single insertion semiconductor testing is performed by sequentially executing testing cycles, characterized by the tester alternately executing temperature testing periods and temperature ramping periods for the first subgroup, while simultaneously executing temperature ramping periods and temperature testing periods for the second subgroup. The temperature testing periods operate at two or more different temperatures. The single insertion testing sequence entirely eliminates tester index time when the testing time is equal to or greater than the ramping times, and substantially reduces tester index time when the testing time is less that the ramping times.
Abstract:
An integrated circuit (102) comprises one or more integrated circuit elements which may interact with other circuitry via one or more input/output pins. In the present invention the circuit elements include and interface element (101) for interfacing with external test circuitry. The interface element communicates with the external test circuitry via a single input/output pin (201) dedicated for testing.
Abstract:
The present invention relates generally to data processing systems, in particular, to computer-controlled automatic test systems for testing integrated circuits, and more particularly to memory test systems which interface with high speed protocol memories such as synchronous DRAM, in particular DDR.A data processing system comprises a data transmitter having a plurality of data transmitting sections operable in parallel for transmitting data, wherein the data trasmitter additionally comprises a circuit for synchronising said parallel data transmitting sections; a programmable frequency clock generator for generating a clock signal, wherein said programmed frequency includes a full-frequency and a low-frequency, the low frequency being a quotient of the full frequency and a number of said data transmitting sections; a multiplexer that receives data from said data transmitting sections at said low frequency and provides multiplexed output data at said full frequency; a plurality of registers for latching data and supplying latched data to a plurality of logic devices; wherein said data transmitting sections, said registers and said receiving devices operate at said low frequency; while said output data are transmitted and received at said full frequency.
Abstract:
A method and arrangement for testing external memories of different types coupled to a network interface controller interprets the results of the memory test differently in accordance with the memory test differently in accordance with the memory type. A fail state indicator is used by test controller to indicate the proper offset to add or subtract to a test address to calculate the actual failing memory location.