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发表于 2019-3-8 23:18:44
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①In figure 2-2, notice the top symbol,CLK.
在图二里,声明首位的标示是计时器。
②This is the computer system clock;the microprecessor uses the system clock to synchronize its operations
这是电脑的记录系统,微处理器用记录系统去校准它的操作。
③The microprecessor places the address onto the bus at the beginning of a clock cycle,a 0/1 sequence
of the system clock.
在记录循环的开始,微处理器把地址放置在总线上,一个系统记录序列开始了。
④One clock cycle later, to allow time for memory to decode the address and access its data, the microprocessor
asserts the READ Signal.
一个记录循环过后,给予存储器解码地址和存取资料的时间,微处理器发出阅读信号。
⑤This causes memory to place its data onto the system data bus.
这是因为存储器把资料存放在资料总线上。
⑥During this clock cycle, the micropercessor reads the data off the system bus and stores it in
one of its registers
在记录循环期间,微处理器阅读完资料并把他们存在一个系统总线里的寄存器中。
⑦At the end of the clock cycle it removes the address from the address bus and deasserts the
READ signal.
在记录循环的最后,它移除了地址总线里的这个地址,并且取消了阅读信号。
⑧Memory then removes the data from the data bus,completing the memory read operation.
存储器之后移除了数据总线里的数据,完成了存储器的阅读操作。 |
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