公开(公告)号：US10955472B1

公开(公告)日：2021-03-23

申请号：US16444917

申请日：2019-06-18

Applicant: Amazon Technologies, Inc.

Inventor： Dan Trock ,  Valentin Bader ,  Shlomi Vilozny ,  Shimon Rahamim ,  Danny Sapoznikov ,  Yair Armoza ,  Itai Avron

IPC: G01R31/3177 ,  G01R31/317

Abstract: An integrated circuit includes first and second cores. Each core has a power-switchable portion in a first power domain in which an operating power is turned on or off in response to a power control signal. The first power domain includes a first scan chain, and the first power domain also includes a plurality of outputs. Each core also includes an always-on portion in a second power domain in which the operating power is maintained during testing of the integrated circuit. The second power domain also has a second scan chain. The second power domain further includes respective isolation gates coupled to the plurality of outputs of the first power domain, and the second scan chain includes a respective wrapper cell coupled to some isolation gates. The integrated circuit is configured to power off and isolate the power-switchable portion in the first power domain based on a scan test result.