题目内容
the entry address of external interrupt 0 interrupt is 0003h.
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8051 single chip microcomputer allows five interrupt sources to request interrupt, which can be shielded by software, that is, IE is used to control the permission and prohibition of interrupt
When the system of MCS-51 is reset, the lower four bits of TMOD mode control register are all 0.
Five interrupt sources of. 8051 MCU have interrupt request input pins on the chip.
土压力是土与挡土结构之间相互作用的结果，它与结构的变位有着密切关系。以挡土墙为例，作用在挡土墙墙背上的土压力可以分为哪几种？
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