Kwafin RAM na al'ada (Random Access Memory) wanda aka saba amfani dasu a kwakwalwa ba shi da amfani. Wannan yana nufin cewa idan ka kashe kwamfutar, duk bayanin da aka adana a cikin ƙwaƙwalwar ajiyar ƙwaƙwalwa ta ɓace. Ya bambanta da wannan, ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya ba ta da maras kyau wanda ke nufin cewa bayanin da aka adana a wannan nau'in ƙwaƙwalwar ajiyar fasaha ana kiyaye shi lokacin da aka yanke ikon. Bayani da aka rubuta da kuma share daga waɗannan ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya an yi ta hanyar lantarki maimakon a hanyar hanyar hanyar injiniya - kamar yadda ake amfani da fasahar EEPROM (Electrically Erasable Read-Only Memory). Wannan nau'i na fasahar fasaha mai banbanci ya bambanta daga inji mai asali kamar daidaitattun matsaloli ; Ana adana bayanin da ke cikin wannan yanayin ta amfani da magnetism. Mafi yawan ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiyar amfani a yau shine NAND - an ɗauke wannan sunan daga hanyar ƙira na lantarki NAND mai aiki saboda ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya yana amfani da ƙananan mashigin MOSFET wadanda aka shirya su a cikin hanyar.
Yaya Yayi aiki?
Kamar yadda aka bayyana a baya, ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya tana amfani da transistors masu ƙyama. Wadannan an shirya su a cikin grid. Maimakon transistor na jiki wanda yana da ƙofar guda, haske ƙwaƙwalwar NAND yana da ƙõfõfi biyu. Samun ƙananan ƙofofi yana sa ya yiwu a 'kaya' wani ƙarfin lantarki a tsakanin ƙananan ƙofofin biyu don kada ya rabu da shi - wannan yana da mahimmanci kuma yana sanya duk wani bayani da aka adana maras amfani. A gaskiya ma, wannan 'tarkon' '' (wanda ke wakiltar bayanin) a kan guntu zai iya zama a cikin wani kulle kulle shekaru - ko har sai ka shafe ƙwaƙwalwar. An shafe bayanai da aka adana ta hanyar rage wutar lantarki daga tsakanin ƙananan ƙofofi ta amfani da siffar ƙuƙuwa na musamman na musamman wanda ke da ƙwarewa don fasahar ƙwaƙwalwar ajiya.
Fasahar Lantarki ta Fasaha ta Fasaha
Akwai na'urorin lantarki masu amfani da yawa waɗanda suke amfani da ƙwaƙwalwar ajiyar NAND a matsayin ajiya. Wasu mafitacin wurin ajiya na waje suna amfani da ƙwaƙwalwar ƙwaƙwalwar NAND. Nau'ikan matakan da za ku iya samowa da ke amfani da wannan fasahar sun haɗa da:
- 'Yan wasan MP3
- Mai watsa shirye-shiryen watsa labaru ( PMP s)
- Katin ƙwaƙwalwa / ƙwaƙwalwar ajiya kamar MicroSD da MicroSDHC
- USB Flash tafiyarwa
- Wayoyin hannu / Wayoyin
- Wasu na'urorin multimedia
Abũbuwan amfãni da rashin amfani
Kamar kowane fasaha, akwai wadata da kuma kaya na amfani da shi. Ɗaya daga cikin amfanin da ya fi dacewa ta yin amfani da ƙwaƙwalwar ajiya na haske (da kuma na'urorin da suke amfani dasu) shine cewa babu wani sashi na kayan aiki wanda zai iya ɓarna ko sauƙi lalacewa. Don 'yan wasan MP3 da wasu na'urorin da za su iya kunna kiɗa na dijital, wannan shi ne matsakaicin ajiyar ajiya wadda ba ta da haɗari daga ƙwaƙwalwar haɗari, haɗuwa da haɗari mai haɗari, da dai sauransu. Ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiyar ƙima ce kuma ƙila za ta iya zama mai kyau don ajiya - domin masana'antun biyu na na'urori masu amfani da masu amfani da suke son sayen ƙarin ajiya a cikin nau'i na katin ƙwaƙwalwa.
Duk da haka, ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya tana da kuskure. Don masu farawa, yana da ƙarancin lokaci a yawan lokutan da za a iya rubuta bayanai a wannan yanki na ƙwaƙwalwa. Wannan an san shi ne a lokacin da ake kira P / E (saurin haɗakar shirin) kuma yawanci yana da kimanin kusan 100,000 karanta / ya rubuta. Bayan haka, ƙwaƙwalwar ajiyar ajiya zai rage cikin aminci yayin da ƙwaƙwalwar ajiyar NAND ta ɓace. Wannan ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya zata iya ƙwaƙwalwa a kan 'yan wasan MP3 da sauran na'urorin ƙwaƙwalwar ajiya ta amfani da firmware wanda ke yada waɗannan karatun karatu / rubutawa fiye da yin na'ura shekaru masu yawa a ƙarƙashin amfani ta al'ada. Wani ƙuƙwalwar ajiya don ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya har yanzu ba ta ƙidayar ƙarfin TB (Terabyte) da muke gani a cikin ƙananan kayan aiki ba don haka wannan fasaha ba za a iya amfani da shi ba (duk da haka) don ajiya ajiya a babban sikelin.