Attention inofanirwa kubhadharwa ku PCB patani

Manyepo 1: iyo pcb dhizaini yebhodhi iri haina kukwirira, saka shandisa yakatetepa waya uye otomatiki jira.

Mhinduro pa: Otomatiki wiring inofanira kutora hombe pcb nharaunda, panguva imwe chete, kakawanda zvakapetwa kupfuura bhuku reruoko wiring, rakakura mune batch zvigadzirwa, pcb yekugadzira mutengo uchifunga izvo zvinhu kuwedzera kune bhizinesi zvinhu, ndiyo tambo upamhi uye huwandu hwemaburi, izvo zvinokanganisa goho rePBB uye kudyiwa kwenhamba shoma, chengetedza mutengo wemutengesi, zvakare ipa mutengo kuti uwane chikonzero.

Nhema dzechipiri: Aya masheni ebhasi anodhonzwa neanodzivirira kuti anzwe akachengeteka.

Mhinduro: Zviratidzo zvinoda kudhonzwa kumusoro uye pasi nekuda kwezvikonzero zvakawanda, asi kwete ese iwo. Dhonza kusagadzikana kudhonza kumusoro uye pasi imwe chete yekuisa chiratidzo, iyo yazvino iri pazasi mashoma ma microamp, asi chiratidzo chekutyaira, chazvino chinosvika milliamperes, ikozvino system inowanzo kuve 32-bit kero data, panogona kunge paine 244/245 mushure kusarudzika kwebhazi uye chimwe chiratidzo, chinodhonzwa, mashoma mawati emagetsi ekushandisa pakuramba.

Mhinduro: Kana chiteshi cheI / O chisina kushandiswa chakamiswa, kupindira kudiki kubva kunze kunogona kuve chiratidzo chekupinza chekudzokororwa kwekudzokororwa, uye kushandiswa kwesimba kweMos zvishandiso kunoenderana nenhamba yesuo rinobaya. Kana iwe ukaidhonza iyo kumusoro, pini yega yega ichave iinewo ma microamperes azvino, saka nzira yakanakisa ndeyekuimisikidza kuburitsa (hongu, hapana imwe inotyairwa chiratidzo kunze).

Nhema yechina: Kune masuo mazhinji kwazvo asara mune iyi FPGA, saka ngatiitei

Mhinduro: Iko kushandiswa kwesimba kweFGPA kwakaenzana nenhamba yemafiripi anoshandiswa uye huwandu hwemapapiro, saka iko kushandiswa kwesimba kweiyo imwechete FPGA modhi inogona kusiyana nemazana zana mumatunhu akasiyana panguva dzakasiyana. Kuderedza huwandu hwemafiripi-akakurumidza kumhanya ndiyo nzira yakakosha yekuderedza FPGA simba rekushandisa.

Nhema yechishanu: Iko kushandiswa kwesimba kwezvipisi zvidiki izvi kwakanyanya kuderera kuti unetseke nezvazvo

Mhinduro pa: Iyo ABT16244 inoshandisa isingasviki 1 ma isina mutoro, asi indekisi yayo ndeyekuti pini imwe neimwe inogona kutyaira mutoro we60mA (senge yekumiririra inoenderana makumi emakumi eohm), ndiko kuti, simba rakawanda rekushandisa re60 * 16 = 960mA yakazara mutoro. Ehezve, ingori kuti simba remagetsi rakasimba zvekuti kupisa kuri kudonha pamutoro.

Nhema 6: Kune akawanda manongedzo ekudzora mundangariro, ini ndinongoda kushandisa OE uye TINOPA zviratidzo pabhodhi rino, kuti data ribude nekukurumidza zvakanyanya kana uchiverenga.

Mhinduro: Iko kushandiswa kwesimba kwekurangarira kwakawanda kuchave kwakapfuura kagumi nguva huru apo kusarudzwa kwechip kunoshanda (zvisinei neOE neWE) pane kusarudzwa kwechip kusiri, saka CS inofanira kushandiswa kudzora chip pese pazvinogoneka uye hupamhi hwechip kusarudza kupomba kunofanira kuderedzwa kusvika pazvinogona kana zvimwe zvinodiwa zvasangana.

Nhema yechinomwe: Aya masignini akamhanyiswa sei? Chero bedzi iri mutambo wakanaka, inogona kubviswa

Mhinduro: Kuwedzera kune mashoma mashevhisi akanangana (akadai se100BASE-T, CML), akawandisa, chero bedzi asiri akakura zvakanyanya, haatombofanirwe kuenderana, kunyangwe kana mutambo wacho usiri iwo mutambo wakanakisa. Sezvo TTL yekubuditsa impedance iri pasi pe50 ohms, kana kana makumi maviri ohm, kana mumutambo wakakura kudaro kuramba kwavo, iyo yazvino yakakura kwazvo, kushandiswa kwesimba hakugamuchirwe, uye chiratidzo maturikisi anenge ari madiki kuti ashandise, taura avhareji yekuburitsa chiratidzo mu kuburitswa kwepamusoro uye kwakadzika kubuda kwemagetsi emagetsi panguva dzakajairika kwete zvakafanana, zvakare hazvienzane chaizvo. Naizvozvo, kuenzaniswa kweTTL, LVDS, 422 uye zvimwe zviratidzo zvinogona kutambirwa sekureba sekukwira kudarika.

Nhema 8: Kuderedza kushandiswa kwesimba inyaya yevashandi vehardware, uye software haina chekuita.

Mhinduro pa: Hardware ingori danho, asi iyo showo isoftware, ingangoita yega chip iri pabhazi kuwana, yega chiratidzo flip ingangoita inodzorwa nesoftware. Kana iyo software ikakwanisa kudzikamisa nguva dzekuwana dzekunze ndangariro (kushandiswa kwakawanda kwemarejista misiyano, kushandiswa kwakawanda kwemukati CACHE, nezvimwewo), mhinduro inokodzera panguva yekukanganisa chaiwo mabhodhi achaita mipiro mikuru kuderedzwa kwesimba rekushandisa