【简答题】【消耗次数:1】
8255有三种工作方式,其中能工作于方式0的口有[填空1]; 能工作于方式1的口有[填空2];能工作于方式2的口有[填空3]
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相关题目
【简答题】 8255具有3种工作方式,其中方式0为[填空1];方式1为[填空2]; 方式2为[填空3]。8255片内可寻址的端口有[填空4]个。
【单选题】 8255A的A口工作在方式2时,B口可工作()
①  方式0或方式1
②  方式1或方式2
③  只能工作在方式1
④  任何方式都不行,只能空着
【简答题】 8255A的工作方式有方式0功能为[填空1], 方式1功能为[填空2], 方式2功能为[填空3]。
【单选题】 8255A的( )可工作于方式2。
①  A口
②  B口
③  C口
④  A口和B口
【简答题】 8253具有[填空1]个独立的[填空2]位计数器,各计数器都有[填空3]种不同的工作方式。
【简答题】 屋面排水方式有[填空(1)]和[填空(2)]两种
【简答题】 MCS-51单片机的T1用作计数方式,工作方式1时,则工作方式控制字为TMOD=[填空1]。
【单选题】 定时器T1作定时方式,工作方式选用方式2,则工作方式控制字为()。
①  02H
②  06H
③  20H
④  60H
【填空题】 疾病的转归有[填空(1)][填空(2)]和[填空(3)]三种结局。
【简答题】 I/O端口的寻址方式有两种,分别是[填空1],[填空2]。
随机题目
【单选题】 I seem to have met you ____.
①  some time
②  ago
③  yet
④  before
【单选题】 Mary regretted not ____ to John’s birthday party last Sunday.
①  going
②  to go
③  having been going
④  to be going
【单选题】 26. We regret to inform you that the materials you ordered are out of____ .
①  work
②  reach
③  practice
④  stock
【单选题】 It’s no use just telling me to do it. Suggest some ____ ways to do it.
①  positive
②  belief
③  attitudes
④  shapes
【单选题】 As a result of the unfavorable working conditions, the project has to be put off ____ .
①  temporarily
②  tremendously
③  traditionally
④  typically
【单选题】 11. I prefer ____ dinner when we arrive there.
①  having
②  to have
③  taking
④  to take
【单选题】 As a teacher of elementary school, you should be patient ____ those pupils.
①  of
②  with
③  for
④  at
【单选题】 ____ the whole, it was a successful evening.
①  On
②  At
③  From
④  In
【单选题】 ____, the more you are aware of content and meaning.
①  The more words you are familiar to
②  The more words you are familiar with
③  You are familiar to more words
④  You are familiar with more words
【单选题】 The English teacher strongly advises that every student ____ an all English dictionary.
①  to buy
②  buying
③  in buying
④  buy