ELECTRONIC SYSTEM, SYSTEM DIAGNOSTIC CIRCUIT AND OPERATION METHOD THEREOF

摘要

An electronic system, a system diagnostic circuit, and an operation method thereof are provided. The system diagnostic circuit includes a data register circuit, an instruction register circuit, a diagnostic controller circuit, a control register circuit, and a detect circuit. The diagnostic controller circuit determines to transmit test data to the instruction register circuit or the data register circuit according to an operating state. The detect circuit update the control register circuit when the first test data transmitted to the data register circuit meets a predefined pattern.

主权项

1. A system diagnostic circuit of an electronic system, comprising:
an interface, configured to receive a first test data; a data register circuit, wherein the data register circuit is an IDCODE register or a bypass register; an instruction register circuit; a diagnostic controller circuit, configured to determine to transmit the first test data to the instruction register circuit or the data register circuit according to an operating state; a control register circuit; and a detect circuit, configured to update the control register circuit when the first test data transmitted to the data register circuit meets a predefined pattern.