Semiconductor integrated circuit having CPU and multiplier
    1.
    发明授权
    Semiconductor integrated circuit having CPU and multiplier 失效
    具有CPU和乘法器的半导体集成电路

    公开(公告)号:US5832248A

    公开(公告)日:1998-11-03

    申请号:US555262

    申请日:1995-11-08

    摘要: A logic LSI chip includes a CPU, a bus, a memory, and a multiplier. In addition, the logic LSI chip includes a command signal line for transferring, from the CPU to the multiplier, a command regarding a multiplication instruction relating to data read out, while the data is being read out from the memory, so that the multiplier can fetch the data directly from the bus. While the CPU is reading data from the memory, therefore, a command of a multiplication instruction relating to data read out is transferred from the CPU to the multiplier. A bus cycle control circuit receives a state signal from the multiplier when the multiplier is executing a repetitional operation and the bus cycle control circuit responds to the state signal by signalling the CPU to delay issuance of a succeeding command to the multiplier.

    摘要翻译: 逻辑LSI芯片包括CPU,总线,存储器和乘法器。 此外,逻辑LSI芯片包括用于在从存储器读出数据的同时从CPU向乘法器传送关于与读出的数据相关的乘法指令的命令的命令信号线,使得乘法器 从总线直接获取数据。 因此,当CPU从存储器读取数据时,与读出的数据相关的乘法指令的命令从CPU传送到乘法器。 当乘法器执行重复操作时,总线周期控制电路接收来自乘法器的状态信号,并且总线周期控制电路通过发信号通知CPU来延迟向乘法器发出后续命令来响应状态信号。