题目内容
A timer must be used as baud rate generator when AT89S51 single chip microcomputer carries out serial communication.
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When AT89S51 MCU communicates with each other in serial mode, the baud rate of timer mode 2 is lower than that of timer mode 1.
The transmit buffer and receive buffer of serial port have only one unit address, but they are actually two different registers.
通用水泥的技术性能标准?
通用硅酸盐水泥强制性化学指标?
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