Bi-directional scan flip-flop circuit and method

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12166487
APP PUB NO 20240097661A1
SERIAL NO

18152017

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A scan flip-flop circuit includes a selection circuit including first and second input terminals coupled to first and second I/O nodes, a flip-flop circuit coupled to the selection circuit, a first driver coupled between the flip-flop circuit and the first I/O node, and a second driver coupled between the flip-flop circuit and the second I/O node. The selection circuit and drivers receive a scan direction signal. In response to a first logic level of the scan direction signal, the selection circuit responds to a first signal received at the first input terminal, and the second driver outputs a second signal responsive to a flip-flop circuit output signal. In response to a second logic level of the scan direction signal, the selection circuit responds to a third signal received at the second input terminal, and the first driver outputs a fourth signal responsive to the flip-flop circuit output signal.

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Patent Owner(s)

  • TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.; TSMC NANJING COMPANY, LIMITED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Xiangdong Hsinchu, TW 216 2796
Han, Liu Hsinchu, TW 19 14
Kao, Jerry Chang Jui Hsinchu, TW 85 91
Lin, Tzu-Ying Hsinchu, TW 40 56
Meng, Qingchao Hsinchu, TW 45 59
Xian, Huaixin Hsinchu, TW 23 3

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