A Novel Optimized JTAG Interface Circuit Design

Provided by: IDC Technologies Topic: Hardware Date Added: Jan 2012 Format: PDF
In this paper, the authors describe a novel optimized JTAG interface circuit between a JTAG controllers and target IC. Being able to access JTAG using only one or two pins, this circuit does not change the original boundary scanning test frequency of target IC. Compared with the traditional JTAG interface which based on IEEE std. 1149.1, this reduced pin technology is more applicability in pin limited devices, and it is easier to control the scale of target IC for the designer.

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