Lub hauv paus ntsiab lus thiab Scope ntawm eMMC thiab UFS cov khoom

eMMC (Embedded Multi Media Card)tau txais kev sib koom ua ke MMC tus qauv interface, thiab encapsulates high-density NAND Flash thiab MMC Controller hauv BGA nti.Raws li cov yam ntxwv ntawm Flash, cov khoom lag luam tau suav nrog Flash tswj thev naus laus zis, suav nrog kev tshawb pom thiab kho qhov yuam kev, flash nruab nrab tshem tawm thiab sau ntawv, kev tswj tsis zoo, kev tiv thaiv hluav taws xob thiab lwm yam thev naus laus zis.Cov neeg siv tsis tas yuav txhawj xeeb txog kev hloov pauv hauv cov txheej txheem flash wafer thiab txheej txheem hauv cov khoom.Nyob rau tib lub sijhawm, eMMC ib lub nti txuag tau ntau qhov chaw hauv lub motherboard.

Cias muab, eMMC = Nand Flash + tswj + tus qauv pob

Tag nrho cov qauv ntawm eMMC tau qhia hauv daim duab hauv qab no:

eMMC integrates Flash Controller hauv nws kom ua tiav cov haujlwm xws li tshem tawm thiab sau cov kev sib npaug, kev tswj hwm tsis zoo, thiab ECC pov thawj, tso cai rau tus tswv sab los tsom rau cov kev pabcuam sab saud, tshem tawm qhov xav tau tshwj xeeb ntawm NAND Flash.

eMMC muaj qhov zoo hauv qab no:

1. Simplify lub cim xeeb tsim ntawm cov khoom siv xov tooj ntawm tes.
2. Qhov hloov tshiab ceev ceev.
3. Ceev cov khoom tsim khoom.

eMMC tus qauv

JEDD-JESD84-A441, luam tawm nyob rau lub Rau Hli 2011: v4.5 raws li tau hais tseg hauv Embedded MultiMediaCard (e•MMC) Cov Qauv Khoom Muag v4.5.JEDEC kuj tau tso tawm JESD84-B45: Embedded Multimedia Card e•MMC), tus qauv hluav taws xob rau eMMC v4.5 (version 4.5 li) thaum Lub Rau Hli 2011. Lub Ob Hlis 2015, JEDEC tau tso tawm version 5.1 ntawm tus qauv eMMC.

Feem ntau cov xov tooj ntawm tes nruab nrab siv eMMC5.1 flash nco nrog lub theoretical bandwidth ntawm 600M / s.Kev nyeem nrawm nrawm yog 250M / s, thiab cov ntawv sau nrawm yog 125M / s.

Cov tiam tshiab ntawm UFS

UFS: Universal Flash Storage, peb tuaj yeem suav tias nws yog ib qho kev tshaj lij ntawm eMMC, uas yog ib qho chaw cia khoom tsim los ntawm ntau lub cim xeeb flash chips, tus tswv tswj, thiab cache.UFS ua rau qhov tsis xws luag uas eMMC tsuas yog txhawb nqa ib nrab-duplex ua haujlwm (nyeem thiab sau ntawv yuav tsum tau ua nyias), thiab tuaj yeem ua tiav kev ua haujlwm puv duplex, yog li qhov kev ua tau zoo tuaj yeem ua ob npaug.

UFS tau muab faib ua UFS 2.0 thiab UFS 2.1 ua ntej, thiab lawv cov qauv yuav tsum tau nyeem thiab sau nrawm yog HS-G2 (High ceev GEAR2), thiab HS-G3 yog xaiv tau.Ob txheej txheej txheem tuaj yeem khiav hauv 1Lane (ib leeg-channel) lossis 2Lane (dual-channel) hom.Kev nyeem ntawv thiab sau nrawm npaum li cas lub xov tooj ntawm tes tuaj yeem ua tiav yog nyob ntawm UFS flash nco tus qauv thiab cov xov tooj ntawm tes, nrog rau cov processor muaj peev xwm siv UFS flash nco.Kev them nyiaj yug Bus interface.

UFS 3.0 qhia txog HS-G4 specification, thiab ib leeg-channel bandwidth tau nce mus rau 11.6Gbps, uas yog ob npaug ntawm kev ua haujlwm ntawm HS-G3 (UFS 2.1).Txij li thaum UFS txhawb nqa dual-channel bidirectional nyeem thiab sau, interface bandwidth ntawm UFS 3.0 tuaj yeem ncav cuag 23.2Gbps, uas yog 2.9GB / s.Tsis tas li ntawd, UFS 3.0 txhawb nqa ntau qhov kev faib tawm (UFS 2.1 yog 8), txhim kho kev txhim kho kev ua yuam kev thiab txhawb nqa qhov tseeb NAND Flash flash media.

Txhawm rau ua kom tau raws li qhov xav tau ntawm 5G cov khoom siv, UFS 3.1 muaj 3 npaug ntawm kev sau nrawm ntawm lub cim dhau los ntawm lub hom phiaj flash cia.Tus tsav lub 1,200 megabytes ib ob (MB / s) ceev txhim kho kev ua haujlwm siab thiab pab tiv thaiv kev tsis sib xws thaum rub tawm cov ntaub ntawv, tso cai rau koj txaus siab rau qhov qis-latency txuas ntawm 5G hauv lub ntiaj teb kev sib txuas.

Sau nrawm txog 1,200MB / s (sau nrawm yuav txawv ntawm qhov muaj peev xwm: 128 gigabyte (GB) txog 850MB / s, 256GB thiab 512GB txog 1,200MB / s).

UFS kuj tseem siv rau hauv cov khoom siv hauv xeev U disk, 2.5 SATA SSD, Msata SSD thiab lwm yam khoom, UFS hloov NAND Flash siv.