Embedded vs External Memory Devices
Kev nco yog lub cim xeeb uas tau muab tso rau hauv lub nti thiab nws yog lub cim xeeb tsis nyob ib leeg. Embedded nco txhawb nqa lub logic core los ua nws cov haujlwm tshem tawm kev sib txuas lus sib txuas. Cov cuab yeej nco sab nraud xa mus rau cov khoom siv nco uas nyob sab nraum lub logic core. Tam sim no, embedded SRAM (Static Random Access Memory) thiab ROM (Read Only Memory) tau siv dav. Ntawm qhov tod tes, Cov cuab yeej nco sab nraud yog sawv ntsug ib leeg lub cim xeeb xws li hard disks thiab RAM uas tsis koom ua ke ntawm lub nti.
Cov Khoom Siv Memory Embedded
Kev nco nco yog lub cim xeeb tsis nyob ib leeg uas tau muab tso rau hauv lub nti. Embedded nco yog ib qho tseem ceeb hauv VLSI (Kev Sib Koom Tes Loj Heev) vim tias cov khoom siv no tuaj yeem muab kev kub ceev thiab dav tsheb npav. Kev txhim kho ntawm cov khoom siv nco tau yooj yim dua vim qhov loj tuag loj uas tso cai rau kev sib xyaw nco nrog cov logic ntawm tib lub nti thiab kev txhim kho hauv cov txheej txheem thev naus laus zis. Embedded SRAM tau dav siv los ua thawj cache lossis qib-ib (L1) cache ntawm nti. Tam sim no, muaj ntau qhov kev txaus siab los tsim DRAM embedded (Dynamic Random Access Memory) vim qhov nce kev ua tau zoo ntawm microprocessors thiab DRAM. Vim yog qhov nyuaj ntawm DRAM txheej txheem thev naus laus zis, lawv yog cov siv tsawg tshaj plaws hauv cov khoom siv nco. Embedded ROM kuj tau siv dav. Lwm qhov kev xaiv rau embedded tsis volatile nco yog embedded flash nco. Ntxiv nrog rau embedded EPROM thiab EEPROM, embedded flash nco kuj siv tau rau hauv cov chaw ntawd.
External Memory Devices
Cov cuab yeej nco sab nraud yog hais txog cov khoom siv nco uas tsis tau koom ua ke hauv cov nti. Cov no suav nrog cov khoom siv xws li hard drives, CD / DVD ROM, RAM thiab ROM uas tsis koom ua ke hauv cov nti. Kev lig kev cai, lub cim xeeb sab nraud raug xa mus rau cov khoom siv uas tau siv los ua kom ruaj khov ntawm cov ntaub ntawv loj xws li sib nqus disks, CD ROM, thiab lwm yam. Feem ntau siv lwm lub cim xeeb ntaus ntawv yog lub hard disk, uas feem ntau muaj peev xwm khaws tau ntau ntawm cov ntaub ntawv. data.
Qhov txawv ntawm Embedded thiab External Memory Devices yog dab tsi?
Cov khoom siv nco tau yog cov khoom siv nco uas tau muab tso rau hauv lub nti nrog lub logic core, thaum lub cim xeeb sab nraud yog cov khoom siv nco uas nyob sab nraum lub nti. Embedded SRAM thiab ROM yog siv dav dua li sab nraud lossis sawv ib leeg SRAM thiab ROM. Kev siv cov khoom siv hauv ncoo yuav txo tau cov chips thiab txo qhov chaw yuav tsum tau siv los ntawm lub cuab yeej. Tsis tas li ntawd, thaum lub cim xeeb tau kos rau ntawm lub nti nws muab lub sijhawm teb sai dua thiab txo lub zog siv dua li siv lub cim xeeb sab nraud. Ntawm qhov tod tes, tsim cov khoom siv hauv ncoo yuav tsum muaj kev tsim thiab tsim cov txheej txheem ntau dua li lwm cov khoom siv nco. Tsis tas li ntawd, kev sib koom ua ke ntau hom kev nco ntawm tib lub nti yuav ua rau cov txheej txheem tsim khoom ntau dua. Tsis tas li ntawd, ib feem ntawm lub cim xeeb (ua los ntawm RAM, ROM, thiab lwm yam) tuaj yeem haus ib feem loj ntawm cov nti ua rau kev tsim qauv nyuaj rau cov neeg tsim qauv.
