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    • 41. 发明公开
    • Data processor having a break function
    • Datenprozessor mit einer Unterbrechungsfunktion。
    • EP0306644A2
    • 1989-03-15
    • EP88110176.0
    • 1988-06-24
    • HITACHI, LTD.
    • Kurakazu KeiichiAoto, YoshikazuBaba, ShiroMasuda, SatoshiKida, HiroyukiKawashima, ShinjiNaruse, Yoshiaki
    • G06F11/00
    • G06F11/3648G06F11/3656
    • A circuit by which an SWI instruction held in a memory circuit is switchedly input in response to a signal supplied externally, is disposed, whereby the substitution of a program word can be realized using such an internal circuit, so that a high-­speed and reliable break can be effected. Moreover, an interrupt function separate from normal interrupts is established by setting a specified operation mode, whereby when a data processor is used as an emulator, the break of a user program including the ordinary interrupt processes can be easily effected by utilizing the special interrupt function. Also, by additionally providing the function of delivering out a signal indicative of the break status, an external circuit can be simplified.
    • 布置保存在存储器电路中的SWI指令的电路,以响应于外部提供的信号而被切换地输入,从而可以使用这样的内部电路来实现对程序字的替换,使得高速可靠 休息可以实现。 此外,通过设置指定的操作模式来建立与正常中断分离的中断功能,由此当数据处理器用作仿真器时,可以通过利用特殊中断功能容易地实现包括普通中断处理的用户程序的中断 。 此外,通过附加地提供表示中断状态的信号的功能,可以简化外部电路。
    • 48. 发明公开
    • Data processor
    • 数据处理器
    • EP0183231A3
    • 1989-02-15
    • EP85115002.9
    • 1985-11-26
    • HITACHI, LTD.
    • Baba, Shiro
    • G06F12/06
    • G06F12/0653
    • A microprocessor has a register (CR) in which attributive data corresponding to a memory to be coupled to the microprocessor is written, and a control circuit (DCD) which controls address signals to be supplied to the memory in accordance with the attributive data (B o , B i , B 2 ). The attributive data is composed of range data for discriminating ranges of address data supplied to an address bus, system data indicative of addressing systems of the memories corresponding to the respective address ranges, and bit number data indicative of numbers of address bits of the memories. Thus, in a case where the memory to be accessed is of an address multiplexing system as in a dynamic RAM, the address data of the address bus is divided into row address data and column address data, which are then supplied to the memory in time division.