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    • 13. 发明申请
    • SEMICONDUCTOR DEVICE AND DATA PROCESSOR
    • 半导体器件和数据处理器
    • US20110314323A1
    • 2011-12-22
    • US13220747
    • 2011-08-30
    • Yoshihiko HOTTASeiichi SAITOHiroyuki HAMASAKIHirotaka HARAItaru NONOMURA
    • Yoshihiko HOTTASeiichi SAITOHiroyuki HAMASAKIHirotaka HARAItaru NONOMURA
    • G06F1/12
    • G06F1/3253G06F1/3237Y02D10/128Y02D10/151
    • To improve the speed of accessing a low-speed circuit block from a high-speed circuit block without significantly increasing power consumption.In a data processor having a bus controller that performs timing control of access from the CPU operated in synchronization with a high-speed first clock signal to a peripheral circuit operated in synchronization with a low-speed second clock signal, a timing control circuit is provided between the peripheral circuit and the bus controller, and the bus controller causes, in response to a read instruction from the peripheral circuit, the timing control circuit to output data held by the peripheral circuit to the bus controller in synchronization with the cycle of the high-speed clock signal, causes the timing control circuit to start, in response to a write instruction directed to the peripheral circuit, writing into the peripheral circuit in synchronization with the cycle of the high-speed clock signal, and terminates the writing in synchronization with the cycle of the low-speed clock signal.
    • 提高从高速电路块访问低速电路块的速度,而不会显着增加功耗。 在具有总线控制器的数据处理器中,总线控制器执行与高速第一时钟信号同步操作的CPU的访问定时控制到与低速第二时钟信号同步操作的外围电路,提供定时控制电路 在外围电路和总线控制器之间,并且总线控制器响应于来自外围电路的读取指令而导致定时控制电路将周边电路保持的数据与高速的周期同步地传送到总线控制器 速度时钟信号,使定时控制电路响应于指向外围电路的写指令而启动,与高速时钟信号的周期同步地写入外围电路,并且与 低速时钟信号的周期。