International Business Machines Corporation

Ronald J Frishmuth

Cedric Lichtenau

Michael F Fee

Mary Prilotski Kusko

Tobias Webel

Lawrence D Curley

Ulrich Baur

Ralf Ludewig

Ching Lung Tong

Aspects include techniques for implementing a clock path technique for using on-chip circuitry to generate a correct encode pattern to test the on-chip circuitry for encoding and correction of a chip. A computer-implemented method may include initializing a scan of the chip including data and a set of check bits protecting the data; applying a global control bit to a latch on the chip; and applying an additional clock to the latch so the check bits are updated using the on-chip circuitry.

Clock path technique for using on-chip circuitry to generate a correct encode pattern to test the on-chip circuitry

Aspects include techniques for bypassing an encoded latch on a chip during a test-pattern scan and using on-chip circuitry to generate a desired encoded pattern, which is inserted into a scan-bypassed latch, to test the on-chip circuitry for defects. A computer-implemented method may include applying a global control bit to the chip; initializing a scan of the chip while bypassing the encoded latch; and applying an extra scan clock to initiate the encoded latch after completing the scan, wherein the encoded latch is updated with check bits generated by the on-chip circuitry.

Bypassing an encoded latch on a chip during a test-pattern scan

An integrated circuit chip includes a mainline function logic path communicatively connected to a first input/output (I/O) pin, a test logic path communicatively connected to the first I/O pin, a latch disposed between the communicative connection between the test logic function path and the first I/O pin, a second I/O pin communicatively connected to the latch, the second I/O pin operative to send a signal operative to change a state of the latch.

Integrated circuit arrangement for test inputs

Growing community of inventors

Poughkeepsie, NY, United States of America

Ronald J Frishmuth