Qhov txawv ntawm Static RAM thiab Dynamic RAM

Qhov txawv ntawm Static RAM thiab Dynamic RAM
Qhov txawv ntawm Static RAM thiab Dynamic RAM

Video: Qhov txawv ntawm Static RAM thiab Dynamic RAM

Video: Qhov txawv ntawm Static RAM thiab Dynamic RAM
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Static RAM vs Dynamic RAM (SRAM vs DRAM)

RAM (Random Access Memory) yog thawj lub cim xeeb siv hauv computer. Nws tus kheej lub cim xeeb tuaj yeem nkag mus rau hauv txhua ntu, thiab yog li ntawd nws yog hu ua random access memory. RAMs tau muab faib ua ob pawg xws li Static RAM (SRAM) thiab Dynamic RAM (DRAM). SRAM siv cov transistors khaws cia ib qho me ntsis ntawm cov ntaub ntawv thiab nws tsis tas yuav tsum tau rov ua dua tshiab. DRAM siv ib lub capacitor cais los khaws txhua cov ntaub ntawv me ntsis thiab nws yuav tsum tau rov kho dua ib ntus kom tswj tau tus nqi hauv lub capacitor.

Dab tsi yog Static RAM (SRAM)?

SRAM yog hom RAM thiab nws yog lub cim xeeb tsis muaj zog, uas xoob nws cov ntaub ntawv thaum lub hwj chim kaw. Hauv SRAM, txhua qhov me me uas khaws cov ntaub ntawv yog tsim los ntawm plaub lossis rau lub transistors uas ua rau lub flip-flop. Muaj cov transistors ntxiv uas siv los tswj kev nyeem ntawv thiab sau ntawv nkag mus ntawm cov cell cia. Txawm hais tias ib txwm SRAMs siv rau lub transistors los khaws txhua qhov me me, muaj SRAMs uas siv yim, kaum lossis ntau dua transistors khaws cia ib qho me ntsis. Thaum tus naj npawb ntawm cov transistors raug txo, qhov loj ntawm lub cim xeeb ntawm tes txo. Txhua SRAM cell tuaj yeem nyob hauv peb lub xeev sib txawv hu ua nyeem, sau ntawv thiab standby. Ib lub xovtooj ntawm tes yog nyob rau hauv lub xeev nyeem ntawv thaum cov ntaub ntawv tau thov thiab nws nyob rau hauv kev sau ntawv lub xeev thaum cov ntaub ntawv nyob rau hauv lub cell hloov. Lub cell nyob rau hauv lub xeev standby thaum nws nyob twj ywm.

Dynamic RAM (DRAM) yog dab tsi?

DRAM kuj yog lub cim xeeb tsis sib haum xeeb uas siv cov capacitors cais los khaws txhua qhov me me. Capacitors thaum tsis them sawv cev rau tus nqi 0 ntawm me ntsis thiab thaum them nqi sawv cev rau tus nqi 1. Txij li thaum cov capacitors tawm nrog lub sijhawm, lawv yuav tsum tau rov kho dua ib ntus kom tswj tau cov txiaj ntsig khaws cia hauv lawv. Txhua lub xov tooj nco hauv DRAM muaj lub capacitor thiab transistor thiab cov hlwb no tau teem rau hauv ib qho square array. DRAMS tau siv dav rau cov cim tseem ceeb hauv cov khoos phis tawj ntawm tus kheej thiab cov chaw ua si vim lawv pheej yig dua. DRAMs yog tsim los ua kev sib koom ua ke (ICs) uas tuaj hauv cov pob yas nrog hlau pins uas tuaj yeem txuas rau hauv cov tsheb npav. Tam sim no muaj DRAMs nyob rau hauv kev ua lag luam uas yog tsim raws li plug-in modules, uas yog yooj yim mus lis. Ib leeg-hauv-kab Pin Pob (SIPP), Ib Leeg Hauv Kab Nco Module (SIMM) thiab Dual In-line Memory Module (DIMM) yog qee qhov piv txwv ntawm cov qauv no.

Qhov txawv ntawm Static RAM thiab Dynamic RAM yog dab tsi?

Txawm hais tias ob qho tib si SRAMs thiab DRAMs yog qhov tsis muaj kev nco, lawv muaj qee qhov sib txawv tseem ceeb. Txij li thaum DRAM xav tau ib lub capacitor thiab ib lub transistor rau txhua lub cim xeeb ntawm tes, nws yooj yim dua hauv cov qauv dua li SRAM, uas siv rau lub transistors rau txhua lub cim xeeb ntawm tes. Ntawm qhov tod tes, vim yog kev siv cov capacitors, DRAM yuav tsum tau rov ua dua tshiab raws li qhov tsis zoo rau SRAM. DRAMs tsis tshua kim thiab qeeb dua SRAMs. Yog li ntawd lawv tau siv rau lub cim xeeb loj ntawm tus kheej lub computer, chaw ua haujlwm, thiab lwm yam, thaum SRAM siv rau lub cim xeeb me me thiab nrawm dua.

Koj kuj tseem nyiam nyeem:

1. Qhov txawv ntawm RAM thiab ROM

2. Qhov txawv ntawm RAM thiab Cache Memory

3. Qhov txawv nruab nrab ntawm qhov tseem ceeb thiab theem nrab nco

4. Qhov txawv ntawm RAM thiab processor

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