32位微机066教案.ppt

?? 6 ???洢?? 6.1 ?洢????ν? 6.2 ???洢?? 6.3 ???????洢??Cache 6.4 ?洢???? 6.1 ?洢????ν? ?洢??????? ??????????洢???? ???? ???? ???? ?洢????????? ???? ??? ??? ????洢?????????????γ???????洢?? 6.1.1 ??????? 1.?洢???? ????洢??о?:??λb(Bit)???????λ ????洢????:?????B??Byte)???????λ ?洢??????????λ 2.?????? ?????? ??????? ?洢????????????????????????? ?????????????????? 6.1.2 ??ν? ????? ??????棨Cache?? ???洢?? ?????洢?? ???? ?洢?????ν? ???? ???????????????ì?????? 6.1.3 ???????? ??ν?????洢??????????????????ì??? ?????????洢?????????????γ??洢???????????г????Ч???????洢??????????????? ??????????? CPU????洢????????????????????????????????洢??????????????????С???????????С? ???????????????: ???? ????????Temporal Locality?? ?????????????????????????????????????????η???? ???? ???? ????????Spatial Locality?? ????????????????????????????????????????????????????? ???? ????????Order Locality?? ?????????У???????????????????????????е???????к???????е??????????5:1?????????????????????????? ?????????? long mean(long d[], long num) { long i,temp=0; for(i=0; inum; i++) temp=temp+d[i]; temp=temp/num; return (temp); } 6.2 ???洢?? ???洢???????洢?????? ?????????????洢?????? ???????????????????????????????????????????????????洢????? ??MOS?????????????????????????????????????????????? ??????????????洢?????? ??д?洢??RAM ????洢??ROM ???????????棬?????MOS????????????? 6.2.1 ??д?洢?? ??д?洢?? ????洢???????????? ???????????洢???? ???????????????? ?????д?洢?????????Volatile??RAM??????????????????? 1. ??????? SRAM?????RAM??Static RAM?? ?????????????洢??? ????????????μ?· ???????????????????? DRAM?????RAM??Dynamic RAM?? ?????MOS????????洢??? ??????????￡?Refresh?????? ????????????????С????????SRAM?? NVRAM???????RAM??Non-Volatile RAM?? ???к?????SRAMо? ?????????????? 2. ?洢?? ?洢??о????д????洢??? ????洢???????????? ?洢1/4/8/16/32λ???? ?洢??о????? ?洢???????????洢?????????λ?? ??2M??N??о???洢???? M??о?????????? N???????????? 3. ?????д?洢??SRAM ?????????С??????? ??????洢???????8????洢?? 6264 SRAMо? о???????64Kλ ?洢????8K??8 28???????壨DIP?? 13?