eMMC???
????? ???: ???????2020-06-02 ?????102
|
| ?????? eMMC |
| ???eMMC?????????????????flash??????? Flash?????????NOR Flash??NAND Flash?????????????????????顣 1988??Intel???η???NOR flash????,?????????????EPROM??EEPROM?????????档NOR??????DRAM, ??洢????????????????????????????????????????????????????????????????????????У???????? 1989????????????NAND flash???????????????????,??????????????????????????????????????????????NAND flash?????????????NOR?????????д?????????????????????NOR???????????????С????????????????????????????????洢?豸??, ??洢?????????? NAND Flash??洢??????:?? SLC, MLC??TLC?? SLC=Single-Level Cell, ??1bit/cell????д?????????????????MLC??????????10??ζ?д?????? MLC=Multi-Level Cell, ??2bit/cell ,???????????????????????????3000-10000?ζ?д?????? TLC=Triple-Level Cell, ??3bit/cell????????????????????????500?ζ?д???????????????????С? ?????????????????Intel????????????·?????Gordon Moore????????????????????????????????????·?????????????????????18???±???????????????????????????????????????????????????????????18???·????????????NAND Flash?????????????????????12????? NAND Flash??洢??????????SLC?? Single Layer Cell??, ??2003????????MLC (Multi-Layer Cell), ???????SLC?????????????г????????洢????????MLC??TLC??Triple Layer Cell???????????????????洢??????????????????С??о??и???????????洢?????Flash???????????????????????????????????λ?洢?????????? ???????????????????????1bit/cell?????????3bit/cell, ???????????????????????????д????????????????????????????????MLC ?? TLC Flash ?????????????????????о?????EDC??ECC???????д??Flash?????? ?????????????????????????豸??????????????????洢eMMC???????? iphone??iPAD????????????????????????????????????????????????????????洢??????????????????岥???????????GPS??????????????????????С?????????????洢??????и?????????????????д????????????洢о???????????и?С????????NAND Flash ????????????洢???????????????????????????????????д???????????????????д????????????䶮?????洢о?eMMC????????????г??????NAND Flash????????? eMMC ( Embedded Multi Media Card) ????????MMC??????? ??????NAND Flash???MMC Controller????????BGAо??С????Flash???????????????????????Flash???????????????????????????flash?????д???????????????????????????????赣???????flash???????????仯????eMMC????о??????????????????? ???г????????eMMC??????????????????峧????????????SANDISK??samsung??hynix??micron??kingston??????????????????????????????????eMMC?????????????????????????????????????????? eMMC??δ?? eMMC?????????eMMC4.3?????????eMMC4.4??????eMMC4.5?н???????????JEDEC??滮??????????eMMC???????????????UFS(Universal Flash Storage)????????????UFS???????ν?eMMC 4.5????NAND Flash???????????δ?????????????????????????????????????????????????????????????????????????????UFS?????????????????????洢?????????????????????????豸????????????????????????????????????90?????????????????3?????????????????????????????????????????????????????????????????????????????????? |
??????? |
????admin ?????????2020-06-02
