公开(公告)号：US20150242213A1

公开(公告)日：2015-08-27

申请号：US14187272

申请日：2014-02-23

Applicant: QUALCOMM INCORPORATED

Inventor： YANRU LI ,  DEXTER TAMIO CHUN ,  DHAMIM PACKER ALI ,  GREGORY AMERIADA UVIEGHARA ,  ZHONGZE WANG

IPC: G06F9/38

CPC classification number: G06F9/3802 ,  G06F8/66 ,  G06F12/0638

Abstract: Various embodiments of methods and systems for flexible read only memory (“ROM”) storage of coded instructions in a portable computing device (“PCD”) are disclosed. Because certain instructions and/or data associated with a primary boot loader (“PBL”) may be defective or in need of modification after manufacture of a mask ROM component, embodiments of flexible ROM storage (“FRS”) systems and methods use a closely coupled one-time programmable (“OTP”) memory component to store modified instructions and/or data. Advantageously, because the OTP memory component may be manufactured “blank” and programmed at a later time, modifications to code and/or data stored in an unchangeable mask ROM may be accomplished via pointers in fuses of a security controller that branch the request to the OTP and bypass the mask ROM.

Abstract translation: 公开了用于便携式计算设备（“PCD”）中的编码指令的灵活的只读存储器（“ROM”）存储的方法和系统的各种实施例。 由于与主引导加载程序（“PBL”）相关联的某些指令和/或数据在制造掩模ROM组件之后可能是有缺陷的或需要修改的，所以灵活的ROM存储（“FRS”）系统和方法的实施例使用紧密的 耦合的一次性可编程（“OTP”）存储器组件来存储经修改的指令和/或数据。 有利地，因为OTP存储器组件可以在稍后的时间被制造为“空白”并被编程，所以可以通过安全控制器的熔丝中的指针来实现对不可改变的掩模ROM中存储的代码和/或数据的修改，该安全控制器的熔丝将该请求分配到 OTP并绕过掩模ROM。