Implementing a JTAG device chain in multi-die integrated circuit

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11199582
APP PUB NO 20210311115A1
SERIAL NO

16841564

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Abstract

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An example integrated circuit (IC) die in a multi-die IC package, the multi-die IC package having a test access port (TAP) comprising a test data input (TDI), test data output (TDO), test clock (TCK), and test mode select (TMS), is described. The IC die includes a Joint Test Action Group (JTAG) controller having a JTAG interface that includes a TDI, a TDO, a TCK, and a TMS, a first output coupled to first routing in the multi-die IC package, a first input coupled to the first routing or to second routing in the multi-die IC package, a master return path coupled to the first input, and a wrapper circuit configured to couple the TDI of the TAP to the TDI of the JTAG controller, and selectively couple, in response to a first control signal, the TDO of the TAP to either the master return path or the TDO of the JTAG controller.

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Patent Owner(s)

  • XILINX INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Flateau,, Jr Roger D San Jose, US 14 132
Sunkara, Srinu Campbell, US 2 0

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