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8255a - PowerPoint PPT Presentation

3.8 ???????

3.8 ???????

3.8 ???????. ??. ??. ??. 8155. ????. ? 256 ??? RAM ? 14 ??? / ???. 8255. ??????. 8251. ?? / ??????. 8253. ?? / ???. 8279. ?? / ????. 3.8.1 8155 ? 8031 ???. ?? Intel ?????????. 1 ? 8155 ???????? 8155 ????? ? 1 ? 256 ????? RAM, ????? 400ns ? ? 2 ???????? / ????

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1.68k views • 153 slides
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??? ???????. ??????? ?????????????? 8255A ????????????? 8253. ??????? ?????????????????????? ?????????????????????? ?????? ?????????????? ?????? ???????? ?????? ??????????? FF ?. ????. ????. ?????. ?????. ????.

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1.31k views • 119 slides
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??? ???????. ??????? ?????????????? 8255A ????????????? 8253. ??????? ?????????????????????? ????????????????????????????????????????????????????????????????????????? FF ?. ?????? FF ??????????? ????? ????? FF ?? ????? ???????? ?????????? ?????? ??? ????????????????????????????.

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1.4k views • 113 slides
? 8 ? ?????????

? 8 ? ?????????

? 8 ? ?????????. ?????? ?????????????? ???????? 8255A ?????????? ???????? 8251 ?????????? ???? / ????? 8253 ??????????. ? 8 ? ?????????. 8.1 ?????? 8255A. 8.2 ??????? / ?????? 8251. 8.3 ?????? / ??????? 8253. 8.1 ?????? 8255A. 8.1.1 ???????. 8.1.2 8255A ?????.

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1.18k views • 90 slides
8.3

8.3

8.3. 8255A ??????. ??? ????????? ??????????? ???????? ??? ??????? 8255A ?? 8255A ??????? ?? 8255A ???? ?? 8255A ? ???? ?? 8255A ?????. ??? ????????? ??????????? ????????. ???????????. ?? ????????????????????? ??????? : ?????????. 0. 1. D0 D1 D2 D3 D4 D5 D6 D7. D0

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914 views • 72 slides
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??? ??????. ???? 8255A ??? 8255A ???????? 8255 ???????? 8255 ???. ????????. ???????????????????? 8 ?? 16 ?? 32 ??????? 1 ?????? ???? ??????????????? ???????????????????????? ???????????????????????????? ???????????????????. ??? ?????????? 8255A. 8255A ???????????????????? 40 ????

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807 views • 61 slides
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8255A ????. ??? ????? ????. 8255 A ? INTEL ??????????????????????????????????????????????????????????????????? 8255A ???????????????????????????????. 8255A ???? 8255A ???? 8255A ??? 8255A ???? 8255A ? PC ????? 8255A ????. ?? 8255A ??????? P325 ?. 9.1 8255 ?????. ?? 8255A ??????.

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758 views • 54 slides
?????? 8255A ????

?????? 8255A ????

?????? 8255A ????. ?????? Email ? xtwang@mail.xidian.edu.cn. 1. 2. 3. 4. 5. 8255A ??. 8255A ?????. 8255 A ????????. 8255 A ?????????. 8255 A ????????. Contents. 8255 A ????. ????????????????????????????? ????????????????????????. ?????. 8255 A ???????? 8255 A ?????

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639 views • 40 slides
??? ?????????? 8255A

??? ?????????? 8255A

??? ?????????? 8255A. ??? 8255A ??????????. ??? 8255A ????????. ? ? ? 8255A ????. ???? 8255A ??????????. ? 24 ?????????? I/O ???? 24 ?????? A ? B ? C ???? ???????????? 0 ??? 1 ??? 2. ?? 8255A ???. 8255A. PA3 PA2 PA1 PA0 RD CS GND A1 A0 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0

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664 views • 38 slides
8.2.4 8255A ?????

8.2.4 8255A ?????

8.2.4 8255A ????? ? 8.4 8255A ??????? 8255A ? A ????? 1 ??? B ????? 1 ??? PC 4 ? PC 5 ????? B ????????? CS ? A 9 ? A 2 =10000000 ????????? 8255A ?????? ????????????? 8.26 ???. ? 8.26 8255 ?? 1 ????????. ???????? MOV AL ? 10101110B ????? AL

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332 views • 18 slides

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