Techniques for using scan storage circuits

摘要

An integrated circuit may include user storage circuits and scan storage circuits. The scan storage circuits may store data from the user storage circuits and provide the data to a user interface during a read-back operation. The user storage circuits may store data from the scan storage circuits, which the scan storage circuits may have received from the user interface during a write-back operation. The scan storage circuits may be arranged in a scan chain and controlled by a local control circuit. The integrated circuit may include multiple local control circuits that each control a sector of the integrated circuit. The local control circuits may communicate with a global control circuit over a communication network, and the global control circuit may communicate with the user interface.

主权项

1. An integrated circuit, comprising:
first and second user storage circuits that store first and second user signals in response to a first clock signal; a scan chain comprising first and second scan storage circuits; a first multiplexer to provide the first user signal from the first user storage circuit to the first scan storage circuit in a first mode, wherein the first scan storage circuit stores the first user signal in response to a second clock signal that is different from the first clock signal, and wherein the first multiplexer provides a first scan signal to the first scan storage circuit in a second mode; and a second multiplexer to provide the second user signal from the second user storage circuit to the second scan storage circuit in the first mode, wherein the second multiplexer provides a second scan signal from the first scan storage circuit to the second scan storage circuit in the second mode, and wherein the second scan storage circuit stores the second scan signal in response to the second clock signal.