Chisamaliro chiyenera kulipidwa kwa PCB kamangidwe

Maganizo olakwika 1: mapangidwe a PCB a gulu ili siokwera, chifukwa chake gwiritsani ntchito waya wocheperako komanso nsalu zodziwikiratu.

Ndemanga pa: Kulumikizana kwamawotchi kuyenera kukhala ndi dera lalikulu la PCB, nthawi yomweyo, nthawi zambiri kuposa kabowo kakang’ono ka zingwe, zazikulu muzogulitsa batch, mtengo wopanga wa PCB poganizira zinthu kuwonjezera pazamalonda, ndiye kutambalala kwa mzere ndi maenje ambiri, omwe amakhudza zokolola za PCB ndikugwiritsa ntchito nambala yaying’ono, kupatula mtengo wamagulitsidwe, ndikupatsaninso mtengo wopeza chifukwa.

Bodza lachiwiri: Zizindikiro za mabasi awa amakoka ndi ma resistor kuti azimva otetezeka.

Ndemanga: Zizindikiro zimafunika kukokedwa mmwamba ndi pansi pazifukwa zambiri, koma osati zonse. Kokani kukana kukoka ndi kutsitsa chizindikiro chimodzi cholowetsa, pakadali pano pali ma microamp ochepa, koma chizindikiritso choyendetsa, pakadali pano chidzafika milliamperes, tsopano makinawa nthawi zambiri amakhala adilesi ya 32-bit, pakhoza kukhala 244/245 pambuyo pake Kutalikirana kwa basi ndi ma siginolo ena, amakokedwa, ma watt ochepa ogwiritsira ntchito mphamvu pakulimbana.

Ndemanga: Ngati doko la O / O lomwe silinagwiritsidwe ntchito layimitsidwa, kusokonezedwa pang’ono kuchokera kunja kumatha kukhala chizindikiritso chobwereza mobwerezabwereza, ndipo kugwiritsa ntchito mphamvu zida za MOS kumadalira kuchuluka kwa zipata zomwe zikungotuluka. Mukachikoka, pini iliyonse imakhalanso ndi ma microamperes apano, chifukwa chake njira yabwino ndikoyiyika kuti izitulutsa (zachidziwikire, palibe chizindikiro china choyendetsedwa kunja).

Bodza lachinayi: Pali zitseko zambiri zotsalira mu FPGA iyi, ndiye tiyeni tichite

Ndemanga: Kugwiritsa ntchito mphamvu kwa FGPA ndikofanana ndi kuchuluka kwa mapepala omwe agwiritsidwa ntchito komanso kuchuluka kwa ma flips, chifukwa chake kugwiritsa ntchito mphamvu kwa mtundu womwewo wa FPGA kumatha kusiyanasiyana maulendo 100 m’maseketi osiyanasiyana munthawi zosiyanasiyana. Kuchepetsa kuchuluka kwa zomwe zikuyenda mwachangu ndi njira yofunikira yochepetsera kugwiritsira ntchito mphamvu kwa FPGA.

Bodza lachisanu: Kugwiritsa ntchito tchipisi tating’onoting’ono ndikotsika kwambiri kuti tisadere nkhawa

Ndemanga pa: ABT16244 imagwiritsa ntchito ochepera 1 ma popanda katundu, koma cholozera chake ndikuti pini iliyonse imatha kuyendetsa katundu wa 60mA (monga kulimbana kofananira makumi a ohm), ndiye kuti, kugwiritsa ntchito mphamvu kwa 60 * 16 = 960mA kwathunthu katundu. Zachidziwikire, ndikuti mphamvu yamagetsi ndiyolimba kwambiri kotero kuti kutentha kumagwera pamtengo.

Bodza lachisanu ndi chimodzi: Pali zikwangwani zowongolera pamakumbukiro, ndimangofunika kugwiritsa ntchito zizindikilo za OE ndi WE pa bolodi, kuti zidziwitso zizituluka mwachangu kwambiri mukawerenga.

Ndemanga: Kugwiritsa ntchito mphamvu kukumbukira kwambiri kudzakhala kopitilira 100 pomwe kusankha kwa chip kumakhala koyenera (ngakhale OE ndi WE) kuposa pomwe kusankha kwa chip sikuli, chifukwa chake CS iyenera kugwiritsidwa ntchito kuwongolera chip ngati kuli kotheka komanso kukula kwa chip zisankho zimayenera kuchepetsedwa momwe zingathere ngati zofunikira zina zakwaniritsidwa.

Bodza 7: Kodi zikwangwani izi zafulumizitsidwa motani? Malingana ngati machesi abwino, amatha kuthetsedwa

Ndemanga: Kuphatikiza pa ma signature angapo (monga 100BASE-T, CML), ndiwotopetsa, bola ngati siokulirapo, sikuti amafunika kufanana, ngakhale masewerawa sakhala abwino kwambiri. Popeza kutulutsa kwa TTL kumakhala kochepera 50 ohms, kapena 20 ohm, ngati pamasewera akulu kwambiri kukana kwawo, mphamvuyo ndiyokulirapo, kugwiritsa ntchito magetsi sikuvomerezeka, ndipo matalikidwe azizindikiro azikhala ochepa kwambiri kuti mugwiritse ntchito, tchulani chizindikiritso Kutulutsa kwapamwamba komanso kutsika pang’ono kwamagetsi pamagetsi munthawi yofananira, sikufanana ndendende. Chifukwa chake, kufanana kwa TTL, LVDS, 422 ndi zizindikiritso zina zitha kuvomerezedwa bola kupitilira muyeso.

Bodza lachisanu ndi chitatu: Kuchepetsa kugwiritsa ntchito mphamvu zamagetsi ndi nkhani yamagulu azinthu, ndipo mapulogalamu alibe chochita.

Ndemanga pa: Hardware ndi gawo chabe, koma chiwonetserocho ndi pulogalamu, pafupifupi chilichonse chomwe chili pakufikira basi, chizindikiro chilichonse chimayang’aniridwa ndi mapulogalamu. Ngati pulogalamuyo ingachepetse nthawi yokumbukira zinthu zakumbuyo (kugwiritsa ntchito zolembetsa zambiri, kugwiritsa ntchito kwambiri CACHE yamkati, ndi zina zambiri), kuyankha munthawi yake kusokonezedwa (kusokonezedwa nthawi zambiri kumakhala kotsika kwambiri ndi kukana kukoka) ndi zina zotheka matabwa enieni apanga zopereka zazikulu pakuchepetsa mphamvu yogwiritsira ntchito magetsi