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    • 6. 发明申请
    • Virtual first in first out direct memory access device
    • 虚拟先进先出直接内存访问设备
    • US20070033302A1
    • 2007-02-08
    • US11495888
    • 2006-07-31
    • Yen-Yu LinShih-Chang HuShiau-Wan Chen
    • Yen-Yu LinShih-Chang HuShiau-Wan Chen
    • G06F13/28
    • G06F13/28
    • A virtual first in first out (FIFO) direct memory access (DMA) device applied in an electronic device having a processor, a UART unit and a virtual FIFO unit is provided. In the virtual FIFO DMA device, a DMA unit is for transferring data between the UART unit and the virtual FIFO unit. A virtual FIFO controller, which has a read pointer and a write pointer, is electrically connected with the DMA unit. When the DMA unit reads data from or writes data into the virtual FIFO unit, the virtual FIFO controller correspondingly changes the value of the read pointer or the write pointer. A virtual port is electrically connected to the DMA unit and the processor. A processor reads data from or writes data into the virtual FIFO unit via the virtual port and the DMA unit.
    • 提供了一种应用于具有处理器,UART单元和虚拟FIFO单元的电子设备中的先进先出(FIFO)直接存储器访问(DMA)设备。 在虚拟FIFO DMA设备中,DMA单元用于在UART单元和虚拟FIFO单元之间传输数据。 具有读指针和写指针的虚拟FIFO控制器与DMA单元电连接。 当DMA单元从虚拟FIFO单元读取数据或将数据写入虚拟FIFO单元时,虚拟FIFO控制器相应地改变读指针或写指针的值。 虚拟端口电连接到DMA单元和处理器。 处理器通过虚拟端口和DMA单元从数据读取数据或将数据写入虚拟FIFO单元。
    • 7. 发明授权
    • Method and apparatus for switching frequency of a system clock
    • 用于切换系统时钟频率的方法和装置
    • US07262644B2
    • 2007-08-28
    • US11163676
    • 2005-10-26
    • Yen-Yu Lin
    • Yen-Yu Lin
    • H03B19/00
    • H03K23/667
    • A system clock switching apparatus, which includes a clock source for providing a reference clock signal; a frequency divider electrically connected to the clock source for dividing the reference clock signal to produce a frequency-divided signal and a system clock signal; and an enable signal generator electrically connected to the frequency divider for dividing the frequency-divided signal to produce at least one enable signal. The frequency divider switches the frequency of the system clock signal at a time period corresponding to a pulse edge of the frequency-divided signal.
    • 一种系统时钟切换装置,包括用于提供参考时钟信号的时钟源; 电连接到时钟源的分频器,用于划分参考时钟信号以产生分频信号和系统时钟信号; 电连接到分频器的使能信号发生器,用于分频分频信号以产生至少一个使能信号。 分频器在与分频信号的脉冲沿相对应的时间段切换系统时钟信号的频率。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR SWITCHING FREQUENCY OF A SYSTEM CLOCK
    • 用于切换系统时钟频率的方法和装置
    • US20060091918A1
    • 2006-05-04
    • US11163676
    • 2005-10-26
    • Yen-Yu Lin
    • Yen-Yu Lin
    • H03B19/00
    • H03K23/667
    • A system clock switching apparatus, which includes a clock source for providing a reference clock signal; a frequency divider electrically connected to the clock source for dividing the reference clock signal to produce a frequency-divided signal and a system clock signal; and an enable signal generator electrically connected to the frequency divider for dividing the frequency-divided signal to produce at least one enable signal. The frequency divider switches the frequency of the system clock signal at a time period corresponding to a pulse edge of the frequency-divided signal.
    • 一种系统时钟切换装置,包括用于提供参考时钟信号的时钟源; 电连接到时钟源的分频器,用于划分参考时钟信号以产生分频信号和系统时钟信号; 电连接到分频器的使能信号发生器,用于分频分频信号以产生至少一个使能信号。 分频器在与分频信号的脉冲沿相对应的时间段切换系统时钟信号的频率。
    • 10. 发明申请
    • MEMORY ACCESS SYSTEMS FOR CONFIGURING WAYS AS CACHE OR DIRECTLY ADDRESSABLE MEMORY
    • 用于配置方式的存储器访问系统作为缓存或直接寻址的存储器
    • US20080201528A1
    • 2008-08-21
    • US12107965
    • 2008-04-23
    • Ting-Cheng HsuYen-Yu LinShien-Tai Pan
    • Ting-Cheng HsuYen-Yu LinShien-Tai Pan
    • G06F12/00
    • G06F12/0653G06F12/0895Y02D10/13
    • A memory system is provided. A processor provides a data access address. A memory device includes a predetermined number of ways. The processor selectively configures a selected number less than or equal to the predetermined number of the ways as cache memory belonging to a cacheable region, and configures remaining ways as directly addressable memory belonging to a directly addressable region by memory configuration information. A memory controller determines the data access address corresponding to the cacheable region or the directly addressable region, selects only the way in the directly addressable region corresponding to the data access address when the data access address corresponds to the directly addressable region, and selects only the way(s) belonging to the cacheable region when the data access address corresponds to the cacheable region. A configuration controller monitors the status of the ways and adjusting the memory configuration information according to the status of the ways.
    • 提供了一种存储系统。 处理器提供数据访问地址。 存储器装置包括预定数量的方式。 处理器有选择地将属于可高速缓存区域的高速缓冲存储器的预定数目的小于或等于预定数量的选择性配置,并且通过存储器配置信息将属于可直接寻址区域的直接可寻址存储器的剩余方式配置。 存储器控制器确定与可高速缓存区域或直接可寻址区域相对应的数据访问地址,当数据访问地址对应于直接可寻址区域时,仅选择对应于数据访问地址的直接可寻址区域中的方式,并且仅选择 当数据访问地址对应于可缓存区域时属于可缓存区域的方式。 配置控制器根据方式的状态监控方式的状态并调整内存配置信息。