The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2023
Filed:
Dec. 15, 2021
Nuvoton Technology Corporation, Hsinchu, TW;
NUVOTON TECHNOLOGY CORPORATION, Hsinchu Science Park, TW;
Abstract
A bus system is provided. A memory device is electrically connected to a master device via a serial peripheral interface (SPI) bus. A plurality of slave devices are electrically connected to the master device via an enhanced SPI (eSPI) bus. Each of the slave devices has an alert handshake pin. The alert handshake pins of the slave devices are electrically connected together via an alert-handshake control line. The first slave device is electrically connected to the memory device via the SPI bus. After obtaining a program code from the memory device, the first slave device verifies the program code using a security code and controls the alert-handshake control line to unlock all the slave devices except for the first slave device via the alert handshake pin in response to the program code being verified. The unlocked slave devices communicate with the master device via the eSPI bus.