廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |
廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |
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更新時間:2018-01-18 04:40:06瀏覽次數(shù):217
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1756-IF8 1756-IF8
1756-IF8 1756-IF8
8051單片機的存儲器組織采用何種結(jié)構(gòu)?存儲器地址空間如何劃分?各地址空間的地址范圍和容量如何?使用上有何特點?
解答:(1)80C51在結(jié)構(gòu)上的特點
80C51采用將程序存儲器和數(shù)據(jù)存儲器截然分開,分別尋址的結(jié)構(gòu),稱為Harvard結(jié)構(gòu)。
:張亮(工程師) 專線:
24小時移動專線: 【】
(2)在物理和邏輯上的地址空間
存儲器上設(shè)有4個存儲器空間:片內(nèi)程序存儲器、片外程序存儲器、片內(nèi)數(shù)據(jù)存儲器、片外數(shù)據(jù)存儲器。
在邏輯上有3個存儲器地址空間:片內(nèi)、片外統(tǒng)一的64KB程序存儲器地址空間,片內(nèi)256B數(shù)據(jù)存儲器地址空間,片外64KB的數(shù)據(jù)存儲器地址空間。
(3)訪問格式
訪問片內(nèi)RAM采用MOV格式
訪問片外RAM采用MOVX格式
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