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    • 5. 发明申请
    • DATA PROCESSING DEVICE ADAPTABLE TO VARIABLE EXTERNAL MEMORY SIZE AND ENDIANESS
    • 数据处理设备适用于可变外部存储器尺寸和可靠性
    • WO2006013498A1
    • 2006-02-09
    • PCT/IB2005/052402
    • 2005-07-19
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.FULCHERI, PatrickCHANCEL, François
    • FULCHERI, PatrickCHANCEL, François
    • G06F13/40
    • G06F13/4013G06F13/4018
    • A data processing device (D) comprises an external memory (EM) for storing data defining at least part of a program in an Endian form, and an integrated circuit (IC), connected to the external memory (EM), via a memory bus (MB) having an N-bit width, and comprising i) an embedded processor (EP) adapted to run the program, ii) an internal memory (IM) for storing at least a bootstrap code of this program, iii) an external memory interface (EMI) connected to the memory bus (MB), and iv) a processor bus (PB) connecting the internal memory (IM) and the external memory interface (EMI) to the embedded processor (EP). The external memory (EM) also stores, at a chosen address, an N-bit data word (C) having a value representative of its size (equal to N/8 bits) and of the Endian form of the stored program data. The data processing device (D) also comprises a configuration means (CM) coupled to the embedded processor (EP) and to the external memory interface (EMI) and arranged to deduce from at least one part of 8 bits of this N-bit data word (C), read by the external memory interface at the chosen address of the external memory (EM), the size and the Endian form of storage of the external memory, and to set the width of the external memory interface (EMI) according to the deduced external memory size and the data processing mode of the embedded processor (EP) according to the deduced Endian form of storage.
    • 数据处理装置(D)包括外部存储器(EM),用于存储以端部形式定义程序的至少一部分的数据,以及通过存储器总线连接到外部存储器(EM)的集成电路(IC) (MB),并且包括i)适于运行该程序的嵌入式处理器(EP),ii)用于存储该程序的至少一个引导代码的内部存储器(IM),iii)外部存储器 接口(EMI)连接到存储器总线(MB),以及iv)将内部存储器(IM)和外部存储器接口(EMI)连接到嵌入式处理器(EP)的处理器总线(PB)。 外部存储器(EM)还在所选择的地址处存储具有表示其大小(等于N / 8位)的值的N位数据字(C)以及存储的程序数据的Endian形式。 数据处理设备(D)还包括耦合到嵌入式处理器(EP)和外部存储器接口(EMI)的配置装置(CM),并且被配置为从该N位数据的8位的至少一部分推导出 字(C),由外部存储器接口在外部存储器(EM)的选定地址读取,外部存储器的大小和端部存储形式,以及根据外部存储器接口(EMI)的宽度设置 根据推断的Endian形式的存储,推断出嵌入式处理器(EP)的外部存储器尺寸和数据处理模式。