FATE: A Flexible FPGA-Based Automatic Test Equipment for Digital ICs

Author:

Zhang Jin1ORCID,Liu Zhenghui1,Hu Xiao23,Liu Peixin23,Hu Zhiling23,Kuang Lidan1

Affiliation:

1. School of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha 410076, China

2. College of Computer Science and Technology, National University of Defense Technology, Changsha 410073, China

3. Key Laboratory of Advanced Microprocessor Chips and Systems, National University of Defense Technology, Changsha 410073, China

Abstract

The limits of chip technology are constantly being pushed with the continuous development of integrated circuit manufacturing processes and equipment. Currently, chips contain several billion, and even tens of billions, of transistors, making chip testing increasingly challenging. The verification of very large-scale integrated circuits (VLSI) requires testing on specialized automatic test equipment (ATE), but their cost and size significantly limit their applicability. The current FPGA-based ATE is limited in its scalability and support for few test channels and short test vector lengths. As a result, it is only suitable for testing specific chips in small-scale circuits and cannot be used to test VLSI. This paper proposes a low-cost hardware and software solution for testing digital integrated circuits based on design for testability (DFT) on chips, which enables the functional and performance test of the chip. The solution proposed can effectively use the resources within the FPGA to provide additional test channels. Furthermore, the round-robin data transmission mode can also support test vectors of any length and it can satisfy different types of chip test projects through the dynamic configuration of each test channel. The experiment successfully tested a digital signal processor (DSP) chip with 72 scan test pins (theoretically supporting 160 test pins). Compared to our previous work, the work in this paper increases the number of test channels by four times while reducing resource utilization per channel by 37.5%, demonstrating good scalability and versatility.

Funder

Army-wide Common Information System Equipment Pre-research Project

Excellent Youth Program of Hunan Provincial Department of Education

Publisher

MDPI AG

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