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8051 ???????? ?2?. ????(Hardware)

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Title: 8051 2 6 Author: Last modified by: Created Date: 9/21/2000 5:58:15 AM Document presentation format – PowerPoint PPT presentation

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Title: 8051 ???????? ?2?. ????(Hardware)


1
8051 ????????
?2?. ????(Hardware)
?? ???(Ext. Memory)
  • ????? ?????? ???

(a) ???? (24?)
(b) ??? (16?)
-1-
????????
?????
2
8051 ????????
?2?. ????(Hardware)
?? ?? ???(Ext. ROM)
  • ?? ROM ?? (64K byte Ext. ROM)



-2-
????????
?????
3
8051 ????????
?2?. ????(Hardware)
?? ?? ???(Ext. ROM)
  • ?? ROM ?? ????



-3-
????????
?????
4
8051 ????????
?2?. ????(Hardware)
?? ??? ???(Ext. RAM)
  • ?? RAM ?? (1K byte RAM)



-4-
????????
?????
5
8051 ????????
?2?. ????(Hardware)
?? ??? ???(Ext. RAM)
  • ?? RAM ?? ???? (MOVX A, _at_DPTR)



-5-
????????
?????
6
8051 ????????
?2?. ????(Hardware)
?? ???(Address Decoding)


(8K byte ROM RAM)
-6-
????????
?????
7
8051 ????????
?2?. ????(Hardware)
?? ??? ??? ??? ??
  • ?? RAM? ??? ??? ??? ??



??? RD PSEN A B C D
0 0 1 1 1 0 0
1 1 0 1 0 1 0
0 1 1 0 1 1 0
0 0 1
-7-
????????
?????
8
8051 ????????
?2?. ????(Hardware)
??
  • ?? ??


- 8051 ??? ROM, RAM ???? - ?? ROM 64K
byte, ?? RAM 32K byte, Latch ?? - ? ???
Datasheet? ?? Part ?(???), Pin ?, Pin ?? ??
????, ???? ?????.
  • ?????


- ??/?/??/?? ?? - ??? ??
-8-
????????
?????
9
8051 ????????
?2?. ????(Hardware)
???(Report) ?
  • ?? 4? 24?(?) 17??? ?? ???? ???? ??


1. Datasheet(???) ??(1?). - AT89C51
- ??(?? - ???), ???(?? - ???) 2. ?? ROM,
RAM? 8051? ???? ???? ????(1?). - 32K byte
ROM, 8K byte RAM, Latch ?? 3. 8051 ?? RAM ?
SFR? ?? ?????(1?).



-9-
????????
?????
10
8051 ????????
?2?. ????(Hardware)
?? ?(7?) ?? ? ??
  • ??


- Datasheet ??(AT89C51) - Datasheet ?? ??,
?? ? ??? ?? ?? ??
  • ?????


- Datasheet ??(???? ??) . ?? ?? ??
. ??? ?? ?? ?? AT89C51 Datasheet 1? ???? ????
??(??)

-10-
????????
?????
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