Raspberry Pi SC1631 Raspberry Microcontroller

Zofotokozera Zamalonda

• Mtengo wa RP2350
• Phukusi: QFN-60
• Internal Flash Storage: Ayi
• Voltage Regulator: On-chip switching regulator
• Zikhomo zowongolera: 5 (kulowetsa kwa 3.3V, kutulutsa kwa 1.1V, VREG_AVDD, VREG_LX, VREG_PGND)

Malangizo Ogwiritsira Ntchito Zogulitsa

• Mutu 1: Mawu Oyamba
• Mndandanda wa RP2350 umapereka zosankha zosiyanasiyana za phukusi poyerekeza ndi mndandanda wa RP2040. Ma RP2350A ndi RP2354A amabwera mu phukusi la QFN-60 popanda komanso ndi zosungiramo zamkati motsatana, pomwe RP2354B ndi RP2350B zimabwera ndi phukusi la QFN-80 lokhala ndi zosungirako komanso zopanda flash.
• Mutu 2: Mphamvu
  Mndandanda wa RP2350 uli ndi kusintha kwatsopano pa-chiptage regulator yokhala ndi zikhomo zisanu. Wowongolera uyu amafunikira zida zakunja kuti agwire ntchito koma amapereka mphamvu zochulukirapo pamafunde olemetsa kwambiri poyerekeza ndi mzere wowongolera pamndandanda wa RP2040. Samalani kukhudzika kwa phokoso mu pini ya VREG_AVDD yomwe imapereka ma analogi ozungulira.

Mafunso Ofunsidwa Kawirikawiri (FAQ)

• Q: Kodi pali kusiyana kotani pakati pa RP2350A ndi RP2350B?
  A: Kusiyana kwakukulu kwagona pa kukhalapo kwa mkati kung'anima yosungirako. RP2350A ilibe zosungiramo zamkati pomwe RP2350B ili.
• Q: Kodi voltage regulator mu mndandanda wa RP2350 ali?
  A: Voltage regulator mu mndandanda wa RP2350 ali ndi zikhomo zisanu.

Kupanga kwa Hardware ndi RP2350 Kugwiritsa ntchito ma RP2350 ma microcontrollers kuti apange matabwa ndi zinthu.

Colophon

• © 2023-2024 Raspberry Pi Ltd
• Zolemba izi ndizovomerezeka pansi pa Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND). tsiku lomanga: 2024-08-08 yomanga: c0acc5b-yoyera
• Chidziwitso chodziletsa chalamulo
• DATA ZA NTCHITO NDI ZOKHULUPIRIKA ZA RASPBERRY PI PRODUCTs (KUphatikizirapo MA DATASHEETS) MONGA ZOSINTHAWIDWA NTHAWI NDI NTHAWI ("RESOURCES") IMAPEREKEDWA NDI RASPBERRY PI LTD ("RPL") "MOMWE ILIRI" NDI MAWU ALIYENSE KAPENA WOSAPATITSA NTCHITO, OSATI ZOTHANDIZA, KUTI, ZINTHU ZOTHANDIZA ZOKHUDZITSIDWA NDI KUGWIRITSA NTCHITO PA CHOLINGA ZINTHU ZINTHU ZINACHITIKA. KUKHALIDWE KOPAMBANA KOPEREKEDWA NDI MALAMULO OGWIRITSA NTCHITO POPANDA CHOCHITIKA PAMENE RPL IDZAKHALA NDI NTCHITO YA CHINENERO, ZOSAVUTA, ZOCHITIKA, ZAPAKHALIDWE, ZOCHITSANZO, KAPENA ZONSE ZONSE ZONSE (KUphatikizira, KOMA ZOSAVUTA, KUGWIRITSA NTCHITO, KUGWIRITSA NTCHITO, KUGWIRITSA NTCHITO; , KAPENA PHINDU; KAPENA KUSONONGEDWA KWA Bzinesi) KOMA ZINACHITIKA NDI PA CHIPEMBEDZO CHONSE CHA NTCHITO, KAYA M'Mgwirizano, NDONDOMEKO ZOYENERA, KAPENA ZOPHUNZITSA (KUPHATIKIZAPO KUSAKHALA KAPENA) ZOMWE ZIKUCHITIKA MU NJIRA ILIYONSE KUCHOKERA KUNTHAWI YOGWIRITSA NTCHITO CHOGWIRITSA NTCHITO CHOGWIRITSA NTCHITO CHOGWIRITSA NTCHITO CHOGWIRITSA NTCHITO CHOGWIRITSA NTCHITO CHONSE. ZOSANGALATSA NGATI.
• RPL ili ndi ufulu wopanga zowonjezera, kuwongolera, kuwongolera kapena kusintha kwina kulikonse ku RESOURCES kapena zinthu zilizonse zomwe zafotokozedwamo nthawi iliyonse popanda kuzindikira.
  Ma RESOURCES amapangidwira ogwiritsa ntchito aluso omwe ali ndi milingo yoyenera ya chidziwitso cha mapangidwe. Ogwiritsa ntchito ali ndi udindo wosankha ndikugwiritsa ntchito RESOURCES ndi kugwiritsa ntchito kulikonse kwazinthu zomwe zafotokozedwamo. Wogwiritsa akuvomera kubwezera ndi kusunga RPL kukhala yopanda vuto pazongongole zonse, ndalama, zowonongeka kapena zotayika zina zomwe zimabwera chifukwa chogwiritsa ntchito RESOURCES.
• RPL imapatsa ogwiritsa ntchito chilolezo chogwiritsa ntchito RESOURCES molumikizana ndi zinthu za Raspberry Pi. Kugwiritsa ntchito kwina konse kwa RESOURCES ndikoletsedwa. Palibe chilolezo choperekedwa kwa RPL ina iliyonse kapena ufulu wina waluntha.
• ZOCHITIKA ZOPANDA KWAMBIRI. Zogulitsa za Raspberry Pi sizinapangidwe, kupangidwa kapena kugwiritsidwa ntchito m'malo owopsa omwe amafunikira kuti asagwire bwino ntchito, monga momwe amagwirira ntchito zida zanyukiliya, kuyendetsa ndege kapena njira zoyankhulirana, kuyang'anira kayendetsedwe ka ndege, zida kapena zida zofunikira pachitetezo (kuphatikiza chithandizo chamoyo. machitidwe ndi zida zina zamankhwala), momwe kulephera kwa zinthuzo kungayambitse imfa, kuvulala kapena kuwonongeka kwakukulu kwakuthupi kapena chilengedwe ("High Risk Activities"). RPL imatsutsa mwatsatanetsatane chitsimikizo chilichonse chosonyeza kulimba kwa Zochitika Zowopsa Kwambiri ndipo savomereza mangawa ogwiritsira ntchito kapena kuphatikiza zinthu za Raspberry Pi mu High Risk Activities.
• Zogulitsa za Raspberry Pi zimaperekedwa malinga ndi RPL's Standard Terms. Kupereka kwa RPL kwa RESOURCES sikukulitsa kapena kusintha Migwirizano Yapakatikati ya RPL kuphatikiza koma osati kungodziletsa ndi zitsimikizo zomwe zafotokozedwamo.

Mutu 1. Chiyambi

Chithunzi 1. KiCad 3D yomasulira ya RP2350A Minimal design example

Pamene tidayambitsa Raspberry Pi RP2040, tidatulutsanso kamangidwe ka 'Minimal'ample ndi kalozera wotsagana nawo Mapangidwe a Hardware okhala ndi RP2040 omwe mwachiyembekezo adafotokoza momwe RP2040 ingagwiritsidwire ntchito pa bolodi losavuta, komanso chifukwa chomwe zosankha zosiyanasiyana zidapangidwira. Ndikufika kwa mndandanda wa RP235x, ndi nthawi yoti muyang'anenso mapangidwe a RP2040 Minimal, ndikusintha kuti awerengere zatsopano, komanso pamitundu iliyonse ya phukusi; RP2350A yokhala ndi phukusi la QFN-60, ndi RP2350B yomwe ndi QFN-80. Apanso, mapangidwe awa ali mu mtundu wa Kicad (7.0), ndipo akupezeka kuti atsitsidwe (https://datasheets.raspberrypi.com/rp2350/Minimal-KiCAD.zip).

 Minimal Board
Bolodi yoyambirira yaying'ono inali kuyesa kupereka mawonekedwe osavuta, pogwiritsa ntchito zida zakunja zomwe zimafunikira kuyendetsa RP2040 ndikukhalabe ndi IO yonse yowonekera komanso yopezeka. Izi zinali ndi gwero lamagetsi (5V mpaka 3.3V linear regulator), crystal oscillator, flash memory, ndi IO zolumikizira (socket yaying'ono ya USB ndi mitu ya GPIO). Ma board atsopano a RP235x Minimal board ndiwofanana, koma ndikusintha kwina kofunikira chifukwa cha zida zatsopano. Kuphatikiza pa izi, ndipo ngakhale ndikutsutsana pang'ono ndi kapangidwe kake, ndawonjezera mabatani angapo a bootsel ndikuyendetsa, limodzi ndi mutu wosiyana wa SWD, womwe uyenera kutanthauza kusakhumudwitsa kocheperako nthawi ino. Mapangidwe samafunikira mabatani awa, ma siginecha akadalipo pamitu, ndipo amatha kusiyidwa ngati mumakonda mtengo kapena danga, kapena muli ndi zizolowezi za masochistic.

 RP2040 vs RP235x mndandanda
Kusintha koonekeratu kuli m'matumba. Pomwe RP2040 ndi 7x7mm QFN-56, mndandanda wa RP235x pakadali pano uli ndi mamembala anayi osiyanasiyana. Pali zida ziwiri zomwe zimagawana phukusi lomwelo la QFN-60; RP2350A yomwe ilibe zosungiramo zamkati, ndi RP2354A yomwe ili. Momwemonso, QFN-80 imabweranso ndi zokometsera ziwiri; RP2354B yokhala ndi kung'anima, ndi RP2350B popanda. Zida za QFN-60 ndi RP2040 yoyambirira zimagawana zomwe zili zofananatage.

Aliyense ali ndi ma GPIO 30, anayi omwe amalumikizidwanso ndi ADC, ndipo ndi 7x7mm kukula kwake. Ngakhale izi, RP2350A sikusintha kwa RP2040, popeza kuchuluka kwa mapini pa chilichonse ndi chosiyana. Mosiyana ndi izi, ma QFN-80 tchipisi tsopano ali ndi 48 GPIOs, ndipo asanu ndi atatu mwa awa tsopano ndi ADC okhoza. Chifukwa cha izi, tsopano tili ndi matabwa Ang'onoang'ono awiri; imodzi ya zida za 60, ndi imodzi ya 80. Ma board ang'onoang'ono awa amapangidwira magawo opanda kung'anima kwamkati (RP2350), komabe mapangidwewo angagwiritsidwe ntchito mosavuta ndi zida zamkati zamkati (RP2354) pongosiya kung'anima. kukumbukira, kapena kugwiritsa ntchito ngati chipangizo chachiwiri (zambiri pa izi pambuyo pake). Pali kusiyana pang'ono pakati pa matabwa awiriwa, kupatulapo kuti mtundu wa QFN-80 uli ndi mizere yayitali yamutu kuti igwirizane ndi GPIO yowonjezera, ndipo bolodi ndilokulirapo.

Kupatula phukusili, kusiyana kwakukulu kwapagulu pakati pa mndandanda wa RP235x ndi RP2040 ndi magetsi. Mndandanda wa RP235x uli ndi mapini atsopano amphamvu, komanso chowongolera china chamkati. 100mA linear regulator ya RP2040 yasinthidwa ndi 200mA switching regulator, ndipo motere, imafunikira madera ena apadera, ndipo osasamalidwa pang'ono ndi masanjidwewo. Ndibwino kuti mutsatire mosamala masanjidwe athu ndi zosankha zamagulu; tadutsa kale zowawa zopanga kubwereza kangapo pakupanga, mwachiyembekezo simukuyenera kutero.

Chithunzi 2. KiCad 3D yomasulira ya RP2350B Minimal design example

 The Design
Cholinga cha Minimal Design examples ndikupanga matabwa osavuta kugwiritsa ntchito mndandanda wa RP235x, womwe uyenera kukhala wotsika mtengo komanso wopangidwa mosavuta, osagwiritsa ntchito matekinoloje a PCB osafunikira. Ma board ang'onoang'ono amapangidwa ndi 2 wosanjikiza, pogwiritsa ntchito zida zomwe ziyenera kupezeka nthawi zambiri, ndipo zonse zimayikidwa pamwamba pa bolodi. Ngakhale zingakhale zabwino kugwiritsa ntchito zida zazikulu, zosavuta kugulitsa pamanja, kamvekedwe kakang'ono ka tchipisi ta QFN (0.4mm) kumatanthauza kuti kugwiritsa ntchito zida zina za 0402 (1005 metric) sizingalephereke ngati ma GPIO onse agwiritsidwa ntchito. Ngakhale kugulitsa pamanja 0402 zigawo sizili zovuta kwambiri ndi chitsulo chosungunulira bwino, ndizosatheka kugulitsa ma QFN popanda zida zapadera.

M'magawo angapo otsatirawa, ndiyesera kufotokoza zomwe zigawo zowonjezerazo zimagwirira ntchito, ndipo mwachiyembekezo kuti tinapanga bwanji zisankho zomwe tidachita. Pamene ndikulankhula za mapangidwe awiri osiyana, amodzi pa kukula kwa phukusi lililonse, ndayesera kuti zinthu zikhale zosavuta momwe ndingathere. Momwe ndingathere, zolemba zonse zamagulu awiriwa ndizofanana, ndiye ndikanena za U1, R1, ndi zina, ndiye kuti ndizogwirizananso ndi matabwa onsewo. Chosiyana chodziwikiratu ndi pamene chigawocho chili pa matabwa (nthawi zonse, izi zidzakhala pamtundu waukulu wa pini 80), ndiye kuti gawo lomwe likufunsidwa lidzangokhala pa mapangidwe a QFN-80; za example, R13 imangowonekera pa bolodi ili.

Mutu 2. Mphamvu

Mphamvu zamagetsi zamtundu wa RP235x ndi RP2040 zimasiyana pang'ono nthawi ino, ngakhale pamasinthidwe ake osavuta, zimafunikirabe zinthu ziwiri, 3.3V ndi 1.1V. Mitundu ya RP235x nthawi imodzi imakhala ndi njala yamphamvu, chifukwa imagwira ntchito bwino, komanso imakhala yosamalidwa bwino (ikakhala yotsika mphamvu) kuposa momwe idakhazikitsira, motero chowongolera chowongolera pa RP2040 chakwezedwa ndi chowongolera chosinthira. Izi zimatipatsa mphamvu zochulukirapo pamafunde apamwamba (mpaka 200mA poyerekeza ndi 100mA m'mbuyomu).

 New pa-chip voltage owongolera

Chithunzi 3. Chigawo chadongosolo chikuwonetsa dera lowongolera mkati

Wowongolera mzere wa RP2040 anali ndi zikhomo ziwiri, zolowetsa za 3.3V, ndi 1.1V zotulutsa kuti apereke DVDD pa chip. Nthawi ino, wowongolera mndandanda wa RP235x ali ndi zikhomo zisanu, ndipo amafuna zina zakunja kuti zigwire ntchito. Ngakhale izi zikuwoneka ngati zobwerera m'mbuyo potengera momwe angagwiritsire ntchito, chowongolera chosinthira chili ndi advantage yokhala ndi mphamvu zochulukirapo pamafunde apamwamba kwambiri.

Monga momwe dzinalo likusonyezera, chowongolera chimayatsa ndikuzimitsa transistor yamkati yomwe imalumikiza voliyumu ya 3.3V.tage (VREG_VIN) kwa VREG_LX pini, ndipo mothandizidwa ndi inductor (L1) ndi linanena bungwe capacitor (C7), akhoza kupanga DC linanena bungwe voliyumu.tage yomwe yatsitsidwa kuchokera pazolowetsa. Pini ya VREG_FB imayang'anira kutulutsa kwa voltage, ndikusintha chiŵerengero cha on/off of the switching cycle, kuonetsetsa kuti voliyumu yofunikiratage imasungidwa. Pamene mafunde akuluakulu asinthidwa kuchoka ku VREG_VIN kupita ku VREG_LX, capacitor yaikulu (C6) pafupi ndi kulowetsako ikufunika, kotero kuti tisakhumudwitse 3.3V yoperekedwa kwambiri. Ponena za mafunde akuluwa, wowongolera amabweranso ndi kulumikizana kwake komwe kumabwerera, VREG_PGND. Mofananamo ndi VREG_VIN ndi VREG_LX, dongosolo la kugwirizana kumeneku ndilofunika kwambiri, ndipo pamene VREG_PGND iyenera kugwirizanitsa ndi GND yaikulu, ziyenera kuchitika m'njira yakuti mafunde onse akuluakulu abwerere mwachindunji ku pini ya PGND, popanda kusokoneza ena onse. GND kwambiri.

Pini yomaliza ndi VREG_AVDD, yomwe imapereka ma analogi ozungulira mkati mwa owongolera, ndipo izi zimamva phokoso.

Chithunzi 4. Gawo lachiwembu lomwe likuwonetsa mawonekedwe a PCB a wowongolera

• Mapangidwe a olamulira pa matabwa ochepa amawonekera kwambiri a Rasipiberi Pi Pico 2. Ntchito yaikulu yapita mu mapangidwe a dera lino, ndi kubwereza kwa PCB kofunikira kuti tipange bwino monga momwe tingathere. akhoza. Ngakhale mutha kuyika zigawo izi m'njira zosiyanasiyana ndikupangitsa kuti chowongoleracho 'chigwire ntchito' (mwachitsanzo, kupanga mphamvu yotulutsa.tage pamlingo woyenera, wabwino wokwanira kuti igwire ntchito), tapeza kuti owongolera athu amayenera kusamaliridwa m'njira yoyenera kuti akhale osangalala, ndipo mwachimwemwe, ndikutanthauza kupanga voliyumu yoyenera.tage pansi pa kuchuluka kwa katundu panopa.
• Pamene tikuchita zoyeserera pa izi, tidakhumudwa pang'ono kukumbutsidwa kuti dziko lovuta la sayansi silinganyalanyazidwe nthawi zonse. Ife, monga mainjiniya, makamaka timayesetsa kuchita izi; kufewetsa zida, kunyalanyaza (nthawi zambiri) zinthu zosafunika kwenikweni, m'malo mwake kuyang'ana kwambiri zinthu zomwe tikukondwera nazo.ample, resistor yosavuta sikungokhala ndi kukana, komanso inductance, etc. Kwa ife (re) tinapeza kuti inductors ali ndi mphamvu ya maginito yogwirizana nawo, ndipo chofunika kwambiri, amawunikira motsatira njira malingana ndi njira yomwe coil ndi chilonda, ndi malangizo a otaya panopa. Tidakumbutsidwanso kuti 'chotetezedwa kwathunthu' sikutanthauza zomwe mukuganiza. Mphamvu ya maginito imachepetsedwa kwambiri, koma ena amathawabe. Tidapeza kuti magwiridwe antchito a owongolera atha kuwongolera kwambiri ngati inductor ili 'njira yoyenera'.
• Zinapezeka kuti mphamvu ya maginito yomwe imachokera ku "njira yolakwika yozungulira" imasokoneza capacitor ya regulator (C7), yomwe imasokoneza kayendetsedwe ka kayendetsedwe kake mkati mwa RP2350. Ndi inductor mumayendedwe oyenera, ndi masanjidwe enieni ndi zosankha zamagulu zomwe zimagwiritsidwa ntchito pano, ndiye kuti vutoli limatha. Mosakayikira padzakhala masanjidwe ena, zigawo, ndi zina zotero, zomwe zingagwire ntchito ndi inductor mumayendedwe aliwonse, koma angagwiritse ntchito malo ambiri a PCB kuti atero. Tapereka masanjidwe ovomerezekawa kuti tipulumutse anthu maola ambiri aumisiri omwe takhala tikukonza ndikukonza yankho losavuta komanso lakhalidwe labwinoli.
• Zowonjezereka, tikupita mpaka kunena kuti ngati mungasankhe kusagwiritsa ntchito wakale wathuamplero, ndiye kuti mumatero mwakufuna kwanu. Monga momwe timachitira kale ndi RP2040 ndi dera la kristalo, pomwe timalimbikira (chabwino, tikuwonetsa mwamphamvu) kuti mugwiritse ntchito gawo linalake (tidzateronso mu gawo la kristalo la chikalatachi).
• Mayendedwe a ma inductors ang'onoang'onowa amanyalanyazidwa kwambiri padziko lonse lapansi, ndikumazungulira kwa koyilo sikutheka kuzindikira, komanso kugawidwa mwachisawawa motsatizana ndi zigawo zingapo. Kukula kwamilandu kokulirapo kumatha kupezeka kuti ali ndi zolembera za polarity, komabe sitinapeze oyenera mu kukula kwamilandu ya 0806 (2016 metric) yomwe tasankha. Kuti izi zitheke, tagwira ntchito ndi Abracon kuti tipange gawo la 3.3μH ndi dontho kuti liwonetse polarity, ndipo chofunika kwambiri, bwerani pa reel ndi iwo onse ogwirizana mofanana. Ma TBD ali (kapena posachedwa) aperekedwa kwa anthu wamba kuchokera kwa ogawa. Monga tanena kale, kupezeka kwa VREG_AVDD kumakhala kosavuta kumva phokoso, motero ndikofunikira kusefedwa. Tidapeza kuti monga VREG_AVDD imangokoka 200μA, fyuluta ya RC ya 33Ω ndi 4.7μF ndiyokwanira.
• Chifukwa chake, kuti mubwerezenso, zigawo zomwe zimagwiritsidwa ntchito zikhala ...
  • C6, C7 & C9 – 4.7μF (0402, 1005 metric)
  • L1 - Abracon TBD (0806, 2016 metric)
  •  R3 – 33Ω (0402, 1005 metric)
• Tsamba la RP2350 lili ndi zokambirana zatsatanetsatane pamawu omwe amawongolera, chonde onani Zida Zakunja ndi zofunikira za PCB.

Zolowetsa

Kulumikiza kwamagetsi pamapangidwe awa kumadutsa papini ya 5V VBUS ya cholumikizira cha Micro-USB (chotchedwa J1 pachithunzi 5). Iyi ndi njira yodziwika bwino yopangira zida zamagetsi, ndipo ndizomveka apa, popeza RP2350 ili ndi magwiridwe antchito a USB, omwe tidzakhala tikulumikizana ndi zikhomo za data za cholumikizira ichi. Monga tikungofunikira 3.3V yokha pamapangidwe awa (chiwongola dzanja cha 1.1V chimachokera mkati), tifunika kuchepetsa 5V USB yomwe ikubwera, pamenepa, pogwiritsa ntchito mphamvu ina yakunja.tage regulator, pamenepa ndi mzere wowongolera (wotchedwa Low Drop Out regulator, kapena LDO). Nditayamikira kale ubwino wogwiritsa ntchito chowongolera chowongolera, kungakhalenso kwanzeru kugwiritsa ntchito panonso, koma ndasankha kuphweka. Choyamba, kugwiritsa ntchito LDO kumakhala kosavuta nthawi zonse. Palibe kuwerengera komwe kumafunikira kuti mudziwe kukula kwa inductor yomwe muyenera kugwiritsa ntchito, kapena kukula kwake kwa ma capacitor, ndipo masanjidwewo amakhala olunjika kwambiri. Kachiwiri, kupulumutsa dontho lililonse lomaliza la mphamvu sicholinga pano; ngati izo zinali, ine ndikanaganizira mozama kugwiritsa ntchito switching regulator, ndipo mukhoza kupeza wakaleampkutero pa Rasipiberi Pi Pico 2. Ndipo chachitatu, nditha 'kubwereka' dera lomwe ndidagwiritsa ntchito kale pa RP2040 ya Minimal board. NCP1117 (U2) yosankhidwa pano ili ndi zotsatira zokhazikika za 3.3V, imapezeka kwambiri, ndipo ikhoza kupereka mpaka 1A yamakono, yomwe idzakhala yochuluka pa mapangidwe ambiri. Kuyang'ana pa database ya NCP1117 imatiuza kuti chipangizochi chimafuna 10μF capacitor pazolowera, ndi china pazotulutsa (C1 ndi C5).

Decoupling capacitors

Chithunzi 6. Gawo lachilinganizo lomwe likuwonetsa zolowetsa zamagetsi za RP2350, voltage regulator ndi decoupling capacitors

Mbali ina ya kapangidwe ka magetsi ndi ma decoupling capacitors ofunikira pa RP2350. Izi zimapereka ntchito ziwiri zofunika. Choyamba, amasefa phokoso lamagetsi, ndipo kachiwiri, amapereka ndalama zakomweko zomwe mabwalo mkati mwa RP2350 angagwiritse ntchito posachedwa. Izi zimalepheretsa voltage mulingo wapafupi pafupi kuchokera pakutsika kwambiri pomwe kufunikira kwapano kukuwonjezeka mwadzidzidzi. Chifukwa, cha izi, ndikofunika kuyika decoupling pafupi ndi zikhomo mphamvu. Nthawi zambiri, timalimbikitsa kugwiritsa ntchito 100nF capacitor pa pini yamagetsi, komabe, timapatuka ku lamuloli kangapo.

Chithunzi 7. Gawo la masanjidwe akuwonetsa RP2350 mayendedwe ndi kuphatikizika

• Choyamba, kuti tikhale ndi malo okwanira kuti mapepala onse a chip azitha kuthamangitsidwa, kutali ndi chipangizocho, tiyenera kusokoneza ndi kuchuluka kwa ma capacitor omwe tingagwiritse ntchito. Pamapangidwe awa, zikhomo 53 ndi 54 za RP2350A (zikhomo 68 ndi 69 za RP2350B) zimagawana capacitor imodzi (C12 mu Chithunzi 7 ndi Chithunzi 6), popeza palibe malo ambiri kumbali imeneyo ya chipangizocho, ndi zigawo zake. ndipo masanjidwe a regulator amatsogolera.
• Kusowa kwa malo kumeneku kungakhale kopambana ngati titagwiritsa ntchito zipangizo zamakono / zotsika mtengo, monga zigawo zing'onozing'ono, kapena PCB inayi yokhala ndi zigawo pamwamba ndi pansi. Uku ndi kusinthanitsa kwapangidwe; tachepetsa zovuta ndi mtengo wake, chifukwa chokhala ndi mphamvu zochepa zochepetsera, ndi ma capacitor omwe ali kutali pang'ono ndi chip kuposa momwe zilili bwino (izi zimawonjezera inductance). Izi zitha kukhala ndi zotsatira zochepetsera liwiro lalikulu lomwe mapangidwe angagwire ntchito, monga voltage supply imatha kukhala yaphokoso kwambiri ndikutsika pansi pa voliyumu yololedwatage; koma pazantchito zambiri, kusinthanitsaku kuyenera kukhala kovomerezeka.
• Kupatuka kwina ku lamulo la 100nF ndikuti titha kupititsa patsogolo voltagntchito zowongolera; timalimbikitsa kugwiritsa ntchito 4.7μF kwa C10, yomwe imayikidwa kumbali ina ya chip kuchokera kwa woyang'anira.

Mutu 3. Memory Memory

 Kuwala koyambirira

Chithunzi 8. Gawo la schematic lomwe likuwonetsa kukumbukira koyambira ndi USB_BOOT zozungulira

• Kuti tithe kusunga kachidindo kamene RP2350 ikhoza kuyambitsa ndikuthamanga, tifunika kugwiritsa ntchito kukumbukira kukumbukira, makamaka, quad SPI flash memory. Chipangizo chosankhidwa apa ndi chipangizo cha W25Q128JVS (U3 mu Chithunzi 8), chomwe ndi chip 128Mbit (16MB). Uku ndiye kukula kwakukulu kwa kukumbukira komwe RP2350 ingathandizire. Ngati pulogalamu yanu sikufunika kusungirako mochuluka, ndiye kuti kukumbukira kwakung'ono, kotsika mtengo kungagwiritsidwe ntchito m'malo mwake.
• Popeza databus iyi imatha kukhala pafupipafupi komanso ikugwiritsidwa ntchito pafupipafupi, zikhomo za QSPI za RP2350 ziyenera kulumikizidwa ndi mawaya molunjika ku flash, pogwiritsa ntchito kulumikizana kwakanthawi kuti zisunge kukhulupirika kwa siginecha, komanso kuchepetsa kuphatikizika kwa mabwalo ozungulira. Crosstalk ndipamene ma siginecha pa ukonde umodzi wozungulira amatha kuyambitsa ma voliyumu osafunikiratages pa dera loyandikana nalo, zomwe zingayambitse zolakwika.
• Chizindikiro cha QSPI_SS ndichapadera. Imalumikizidwa ndi kung'anima mwachindunji, koma ilinso ndi zopinga ziwiri (chabwino, zinayi, koma ndibwera pambuyo pake) zolumikizidwa nazo. Yoyamba (R1) ndiyokokera ku 3.3V. Memory flash imafuna cholowetsa chosankha chip kuti chikhale chofananatage ngati pini yakeyake ya 3.3V pomwe chipangizocho chimayendetsedwa, apo ayi, sichigwira ntchito moyenera. RP2350 ikayatsidwa, pini yake ya QSPI_SS imangokhalira kukokera mmwamba, koma pamakhala nthawi yayifupi panthawi yoyatsa pomwe mapini a QSPI_SS sangatsimikizidwe. Kuwonjezera kwa chokoka chotsutsa kumatsimikizira kuti chofunika ichi chidzakwaniritsidwa nthawi zonse. R1 imalembedwa kuti DNF (Osakwanira) pa schematic, monga tapeza kuti ndi chipangizo ichi, kukoka kwakunja sikofunikira. Komabe, ngati kung'anima kwina kukugwiritsidwa ntchito, kungakhale kofunika kuti muthe kuyika 10kΩ resistor apa, kotero kuti yaphatikizidwira kutero.
• Chotsutsa chachiwiri (R6) ndi chotsutsa cha 1kΩ, cholumikizidwa ndi batani lokankha (SW1) lolembedwa 'USB_BOOT'. Izi ndichifukwa pini ya QSPI_SS imagwiritsidwa ntchito ngati 'chingwe cha boot'; RP2350 imayang'ana mtengo wa I / O iyi panthawi ya boot, ndipo ngati ipezeka kuti ndi logic 0, ndiye RP2350 imabwerera ku BOOTSEL mode, kumene RP2350 imadziwonetsera yokha ngati chipangizo chosungiramo misala cha USB, ndipo code ikhoza kukopera mwachindunji. ku izo. Tikangodina batani, timakoka chikhomo cha QSPI_SS pansi, ndipo ngati chipangizocho chitakhazikitsidwanso (mwachitsanzo potembenuza pini ya RUN), RP2350 idzayambiranso mu BOOTSEL mode m'malo moyesa kuyendetsa zomwe zili mu flash. Ma resistors awa, R2 ndi R6 (R9 ndi R10 nawonso), ayenera kuyikidwa pafupi ndi chip chip, kotero timapewa kutalika kwa mayendedwe amkuwa omwe angakhudze chizindikirocho.
• Zonsezi pamwambapa zikugwira ntchito ku RP2350, yomwe ilibe kung'anima kwamkati. Zachidziwikire, zida za RP2354 zili ndi zokumbukira zamkati za 2MB, kotero kukumbukira kwakunja kwa U3 sikofunikira, kotero U3 ikhoza kuchotsedwa mwadongosolo, kapena kungosiyidwa yopanda anthu. Muzochitika zonsezi, tikadafunabe kusunga USB_BOOT yolumikizidwa ku QSPI_SS, kuti titha kulowabe USB boot mode.

 Sekondale flash kapena PSRAM

• Mndandanda wa RP235x tsopano umathandizira chipangizo chachiwiri chokumbukira pogwiritsa ntchito zikhomo za QSPI, ndi GPIO yopereka chosankha chowonjezera. Chifukwa chake, ngati tikugwiritsa ntchito RP2354 (yomwe ili ndi kung'anima kwamkati), ndiye kuti titha kugwiritsa ntchito U3 ngati chowunikira chachiwiri, kapena m'malo mwake ndi chipangizo cha PSRAM. Kuti tichite izi, tifunika kuchotsa QSPI_SS kuchokera ku U3, ndipo m'malo mwake tilumikizane ndi GPIO yoyenera m'malo mwake. GPIO yapafupi yomwe imatha kukhala chip select (XIP_CS1n) ndi GPIO0, kotero pochotsa 0Ω ku R10, ndikuyiyika ku R9, tsopano titha kupeza U3 kuphatikiza pa-chip flash. Kuti athe kutenga advantage za izi, pomwe tili ndi zida ziwiri zakunja zokumbukira kuti mbali zocheperako za RP2350 zitha kupindula, zazikulu mwa ma board awiri Ocheperako, a RP2350B, amaphatikizanso chotsatira chosankha (U4) chowonjezera kukumbukira chip.

Chithunzi 9. Gawo lachidule lowonetsa chipangizo chachiwiri chokumbukira

Kuti mugwiritse ntchito chipangizochi, mwachiwonekere chiyenera kukhala ndi anthu, komanso R11 (0Ω), ndi R13 (10KΩ). Kuphatikiza kwa R11 kumalumikiza GPIO0 (chizindikiro cha XIP_CS1n) ku chip chosankhidwa cha kukumbukira kwachiwiri. Kukokera pa pini yosankha chip ndikofunikira nthawi ino, popeza kusakhazikika kwa GPIO0 kuyenera kukokedwa pang'onopang'ono pamagetsi, zomwe zingapangitse chipangizo chathu kung'anima kulephera. C22 idzafunikanso kuti ipereke kulumikiza kwamagetsi kwa U4.

Anathandizira kung'anima tchipisi
Mayendedwe oyambira owunikira, omwe amagwiritsidwa ntchito pansi kutulutsa sekondi yachiwiritage kuchokera ku flash, imagwiritsa ntchito lamulo la 03h serial read, yokhala ndi maadiresi a 24-bit, ndi wotchi yamtundu wa pafupifupi 1MHz. Imazungulira mobwerezabwereza kuphatikizira zinayi za polarity wa wotchi ndi gawo la wotchi, kuyang'ana sekondi yoyenera.tagndi CRC32.
Monga yachiwiri stage ndiye ali ndi ufulu wokonza-mu-malo pogwiritsa ntchito lamulo lomwelo la 03h serial read, RP2350 imatha kupanga cached flash execute-in-place ndi chip chilichonse chothandizira 03h serial kuwerenga ndi 24-bit adilesi, yomwe ili ndi zida zambiri za 25-series flash . SDK imapereka exampndi sekondi stage ya CPOL=0 CPHA=0, pa https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2350/boot_stage2/boot2_generic_03h.S. Kuti muthandizire kupanga flash pogwiritsa ntchito machitidwe omwe ali pansi, chipangizocho chiyeneranso kuyankha ku malamulo awa:

• Pulogalamu yamasamba ya 02h 256-byte
• 05h status registry yawerengedwa
• 06h ikani kulemba yambitsani latch
• 20h 4kB gawo kufufuta

RP2350 imathandizanso mitundu yambiri yamitundu iwiri ya SPI ndi QSPI. Za example, https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2350/boot_stage2/boot2_w25q080.S imapanga chipangizo cha Winbond W25Q-series cha quad-IO continuous read mode, kumene RP2350 imatumiza maadiresi a quad-IO (popanda prefix prefix) ndipo flash imayankha ndi data ya quad-IO.

Chenjezo lina likufunika ndi ma flash XIP modes pomwe chipangizo chong'anima chimasiya kuyankha malamulo okhazikika, monga Winbond mosalekeza kuwerenga mode tatchulazi. Izi zitha kuyambitsa zovuta RP2350 ikabwezeretsedwa, koma chipangizo chowunikira sichimayendetsedwa ndi mphamvu, chifukwa kung'anima sikungayankhe pamawunivesite a bootrom. Asanatulutse 03h serial kuwerenga, bootrom nthawi zonse imatulutsa zotsatizana zotsatirazi, zomwe ndi njira yabwino kwambiri yoletsera XIP pazida zingapo zowunikira:

• CSn=1, IO[3:0]=4'b0000 (kudzera kutsika kuti mupewe mikangano), perekani mawotchi ×32
• CSn=0, IO[3:0]=4'b1111 (kudzera mmwamba kuti mupewe mikangano), tulutsani mawotchi ×32
• CSn=1
• CSn=0, MOSI=1'b1 (yoyendetsedwa motsika-Z, ma I/Os ena onse Hi-Z), tulutsani mawotchi ×16

Ngati chipangizo chomwe mwasankha sichikuyankha pamndandandawu mukamawerenga mosalekeza, ndiye kuti chikuyenera kusungidwa m'malo momwe kusamutsa kulikonse kumakhazikitsidwa ndi lamulo la serial, apo ayi RP2350 sichitha kuchira pambuyo pokonzanso mkati.
Kuti mumve zambiri pa QSPI, chonde onani QSPI Memory Interface (QMI) mu zidziwitso za RP2350.

Mutu 4. Crystal Oscillator

Chithunzi 10. Gawo lachidule losonyeza kristalo oscillator ndi katundu capacitors

• Kunena zowona, RP2350 sifunikira kwenikweni gwero la wotchi yakunja, chifukwa ili ndi oscillator yake yamkati. Komabe, monga mafupipafupi a oscillator wamkati uyu samatanthauzidwa bwino kapena kuwongolera, kusiyanasiyana kuchokera ku chip kupita ku chip, komanso ndi magetsi osiyanasiyana.tages ndi kutentha, Ndi bwino kugwiritsa ntchito khola kunja pafupipafupi gwero. Mapulogalamu omwe amadalira ma frequency enieni sangatheke popanda ma frequency akunja, USB kukhala choyambiriraample.
• Kupereka ma frequency akunja kutha kuchitika mwa njira ziwiri: mwina popereka wotchi yotulutsa CMOS (square wave ya IOVDD vol.tage) kulowa XIN pini, kapena pogwiritsa ntchito kristalo wa 12MHz wolumikizidwa pakati
• XIN ndi XOUT. Kugwiritsa ntchito kristalo ndiye njira yabwino kwambiri pano, chifukwa onse ndi otsika mtengo komanso olondola kwambiri.
• Crystal yosankhidwa pamapangidwe awa ndi ABM8-272-T3 (Y1 mu Chithunzi 10). Ichi ndi kristalo yemweyo wa 12MHz wogwiritsidwa ntchito pa Rasipiberi Pi Pico ndi Raspberry Pi Pico 2. Timalimbikitsa kwambiri kugwiritsa ntchito kristalo iyi pamodzi ndi maulendo ozungulira kuti muwonetsetse kuti wotchiyo imayamba mofulumira pansi pazochitika zonse popanda kuwononga kristaloyo. Krustalo ili ndi kulekerera kwafupipafupi kwa 30ppm, komwe kuyenera kukhala kokwanira pazogwiritsa ntchito zambiri. Pamodzi ndi kulolerana kwafupipafupi kwa +/- 30ppm, ili ndi ESR yochuluka ya 50Ω, ndi mphamvu ya katundu wa 10pF, zonse zomwe zinali ndi zotsatira pa kusankha kwa zigawo zotsagana nazo.
• Kuti kristalo ikhale yozungulira pafupipafupi yomwe mukufuna, wopangayo amatchula kuchuluka kwa katundu komwe amafunikira kuti atero, ndipo pakadali pano ndi 10pF. Mphamvu yolemetsa iyi imatheka poyika ma capacitor awiri amtengo wofanana, imodzi kumbali iliyonse ya kristalo mpaka pansi (C3 ndi C4). Kuchokera kumalo a kristalo view, ma capacitor awa amalumikizidwa mndandanda pakati pa ma terminals ake awiri. Basic circuit theory imatiuza kuti amaphatikiza kuti apereke mphamvu ya (C3 * C4) / (C3 + C4), ndipo monga C3 = C4, ndiye kuti ndi C3/2 chabe. Mu example, tagwiritsa ntchito 15pF capacitors, kotero kuphatikiza kwa mndandanda ndi 7.5pF. Kuphatikiza pa capacitance yadala iyi, tiyeneranso kuwonjezera mtengo wowonjezera mwangozi, kapena parasitic capacitance, yomwe timapeza kuchokera kumayendedwe a PCB ndi XIN ndi XOUT mapini a RP2350. Tiganiza mtengo wa 3pF pa izi, ndipo popeza mphamvuyi ikufanana ndi C3 ndi C4, timangowonjezera izi kutipatsa mphamvu yolemetsa ya 10.5pF, yomwe ili pafupi kwambiri ndi chandamale cha 10pF. Monga mukuwonera, mphamvu ya parasitic ya traces ya PCB ndiyomwe imayambitsa, chifukwa chake tifunika kuwasunga ang'onoang'ono kuti tisakhumudwitse kristalo ndikuyimitsa kugwedezeka monga momwe tafunira. Yesani ndi kusunga masanjidwewo mwachidule momwe mungathere.
• Kulingalira kwachiwiri ndi ESR yochuluka (yofanana ndi kukana) ya kristalo. Tasankha chipangizo chokhala ndi 50Ω, popeza tapeza kuti izi, pamodzi ndi 1kΩ series resistor (R2), ndizofunika kuti kristalo isayendetsedwe mopitirira muyeso ndikuwonongeka pogwiritsa ntchito IOVDD. mlingo wa 3.3V. Komabe, ngati IOVDD ili yochepera 3.3V, ndiye kuti mapini a XIN/XOUT amachepetsa, ndipo mudzapeza kuti ampKuchuluka kwa kristalo ndikotsika, kapena sikungagwedezeke nkomwe. Pankhaniyi, mtengo wocheperako wa resistor series uyenera kugwiritsidwa ntchito. Kupatuka kulikonse kuchokera kudera la kristalo lomwe lawonetsedwa pano, kapena ndi mulingo wa IOVDD wosiyana ndi 3.3V, kudzafunika kuyesa kwakukulu kuti muwonetsetse kuti kristaloyo imayenda pansi pamikhalidwe yonse, ndikuyamba-mwachangu mokwanira kuti zisadzetse mavuto ndi pulogalamu yanu.

 crystal yovomerezeka

• Pamapangidwe apachiyambi pogwiritsa ntchito RP2350 timalimbikitsa kugwiritsa ntchito Abracon ABM8-272-T3. Za example, kuwonjezera pa zojambula zochepa zakaleample, onani dongosolo la bolodi la Pico 2 mu Zowonjezera B za Raspberry Pi Pico 2 Datasheet ndi kapangidwe ka Pico 2 files.
• Kuti mugwire bwino ntchito komanso kukhazikika pamatenthedwe anthawi zonse, gwiritsani ntchito Abracon ABM8-272-T3. Mutha kupeza ABM8-272-T3 mwachindunji kuchokera ku Abracon kapena kwa wogulitsa wovomerezeka. Pico 2 idakonzedwera makamaka ABM8-272-T3, yomwe ili ndi izi:
• Ngakhale mutagwiritsa ntchito kristalo yomwe ili ndi zizindikiro zofanana, muyenera kuyesa dera lanu pamitundu yosiyanasiyana ya kutentha kuti mutsimikizire kukhazikika.
• Crystal oscillator imayendetsedwa ndi IOVDD voltage. Zotsatira zake, kristalo wa Abracon ndi damping resistor imakonzedwa kuti igwire ntchito ya 3.3V. Ngati mugwiritsa ntchito voliyumu yosiyana ya IOtage, muyenera kuyimbanso.
• Kusintha kulikonse kwa magawo a kristalo kungayambitse kusakhazikika pazigawo zilizonse zolumikizidwa ndi dera la kristalo.
• Ngati simungathe kupeza kristalo yovomerezeka kuchokera kwa Abracon kapena wogulitsa, funsani applications@raspberrypi.com.

Mutu 5. Ma IOs

 USB
Chithunzi 11. Gawo lachiwembu lomwe likuwonetsa mapini a USB a RP2350 ndi kutha kwa mndandanda.

• RP2350 imapereka zikhomo ziwiri kuti zigwiritsidwe ntchito pa liwiro lonse (FS) kapena low speed (LS) USB, kaya ngati wolandira kapena chipangizo, malingana ndi mapulogalamu omwe amagwiritsidwa ntchito. Monga tafotokozera kale, RP2350 imathanso kuyambiranso ngati chipangizo chosungiramo zinthu zambiri za USB, kotero kuyimitsa ma waya ku cholumikizira cha USB (J1 pachithunzi 5) ndikomveka. Ma USB_DP ndi USB_DM mapini pa RP2350 safuna kukoka kapena kukokera kwina kwina (kofunikira kusonyeza liwiro, FS kapena LS, kapena ngati ndi wolandira kapena chipangizo), popeza izi zimamangidwa mu I/Os. Komabe, ma I/O awa amafunikira 27Ω zoletsa zothetsa mndandanda (R7 ndi R8 pachithunzi 11), zoyikidwa pafupi ndi chip, kuti zikwaniritse mawonekedwe a USB.
• Ngakhale RP2350 imangokhala ndi liwiro lathunthu la data (12Mbps), tiyenera kuyesa ndikuwonetsetsa kuti mawonekedwe amtundu wa mizere yopatsira (njira zamkuwa zomwe zimalumikiza chip ndi cholumikizira) zili pafupi ndi
• Kufotokozera kwa USB kwa 90Ω (kuyezedwa mosiyanasiyana). Pa bolodi la 1mm lachikulu monga chonchi, ngati tigwiritsa ntchito mayendedwe a 0.8mm m'lifupi pa USB_DP ndi USB_DM, ndi kusiyana kwa 0.15mm pakati pawo, tiyenera kupeza kusiyana kwa 90Ω. Izi ndikuwonetsetsa kuti ma siginecha amatha kuyenda motsatira njira zopatsiranazi moyenera momwe angathere, kuchepetsa mphamvu yamagetsitage zowunikira zomwe zingachepetse kukhulupirika kwa chizindikiro. Kuti mizere yopatsirayi igwire bwino ntchito, tiyenera kuwonetsetsa kuti pansi pa mizereyi pali malo. Malo olimba, osasokonezeka a mkuwa wapansi, kutambasula kutalika kwa njirayo. Pamapangidwe awa, pafupifupi gawo lonse la mkuwa wapansi limayikidwa pansi, ndipo chisamaliro chinachitidwa kuti mayendedwe a USB asadutse chilichonse koma pansi. Ngati PCB yokulirapo kuposa 1mm yasankhidwa kuti mumange, ndiye kuti tili ndi njira ziwiri. Titha kukonzanso mizere yotumizira ma USB kuti tipeze mtunda wokulirapo pakati pa njanji ndi pansi (zomwe zitha kukhala zosatheka), kapena titha kunyalanyaza, ndikuyembekeza zabwino. USB FS ikhoza kukhala yokhululuka, koma mtunda wanu ukhoza kusiyana. Itha kugwira ntchito m'mapulogalamu ambiri, koma mwina sizingagwirizane ndi muyezo wa USB.

 Mitu ya I/O

Chithunzi 12. Chigawo chadongosolo chosonyeza mitu ya 2.54mm I/O ya mtundu wa QFN60

• Kuphatikiza pa cholumikizira cha USB chomwe chatchulidwa kale, pali mizere iwiri yapamutu ya 2.54mm (J2 ndi J3 mu Chithunzi 12), imodzi mbali zonse za bolodi, zomwe zina zonse za I / O zalumikizidwa. Pali 30 GPIO pa RP2350A, pomwe pali 48 GPIO pa RP2350B, kotero mitu ya mtundu uwu wa Minimal board ndi yayikulu kulola mapini owonjezera (onani Chithunzi 13).
• Popeza uku ndi kapangidwe kazinthu zonse, osagwiritsa ntchito m'maganizo, I/O yapezeka kuti ilumikizidwe momwe wogwiritsa ntchito amafunira. Mzere wamkati wa zikhomo pamutu uliwonse ndi ma I / Os, ndipo mzere wakunja umagwirizanitsidwa ndi nthaka. Ndibwino kuti muphatikizepo zifukwa zambiri pa zolumikizira za I/O. Izi zimathandizira kuti pakhale malo ocheperako, komanso kupereka njira zambiri zobwereranso pamafunde opita ndi kuchokera kumtunda.
• Zogwirizana ndi I/O. Izi ndizofunikira kuti muchepetse kusokoneza kwa ma elekitiroma-magnetic komwe kumatha kuyambitsidwa ndi mafunde obweranso akusintha mwachangu ma siginecha akutenga njira zazitali, zokhotakhota kuti amalize kuzungulira.
• Mitu yonse iwiri ili pa gridi yofanana ya 2.54mm, zomwe zimapangitsa kulumikiza bolodi kuzinthu zina, monga matabwa, kukhala kosavuta. Mungafune kuganizira zoyika mutu wa mzere umodzi wokha m'malo mwa mutu wa mizere iwiri, kugawa mzere wakunja wa zolumikizira pansi, kuti zikhale zosavuta kuti zigwirizane ndi bolodi.

Chithunzi 13. Chigawo chadongosolo chosonyeza mitu ya 2.54mm I/O ya mtundu wa QFN80

Cholumikizira cholakwika

Chithunzi 14. Chigawo chadongosolo chikuwonetsa cholumikizira cha JST chosankha cha SWD debug

Pa-chip debugging, mungafune kulumikizana ndi mawonekedwe a SWD a RP2350. Zikhomo ziwirizi, SWD ndi SWCLK, zilipo pamutu wa 2.54mm, J3, kuti mulole kufufuza kolakwika komwe mwasankha kulumikizidwa mosavuta. Kuphatikiza pa izi, ndaphatikiza mutu wa JST wosankha, womwe umalola kulumikizana kosavuta ku Raspberry Pi Debug Probe. Simufunikanso kugwiritsa ntchito izi, mitu ya 2.54mm idzakwanira ngati mukufuna kukonza mapulogalamu, koma ndimapeza kuti ndizosavuta kutero. Ndasankha cholumikizira chopingasa, makamaka chifukwa ndimakonda mawonekedwe ake, ngakhale sichikhala m'mphepete mwa bolodi, koma choyimirira chilipo, ngakhale chosiyana pang'ono.

Mabatani
Mapangidwe Ochepa tsopano alibe imodzi, koma mabatani awiri, pomwe mtundu wa RP240 unalibe. Imodzi ndi ya kusankha kwa boot ya USB monga tidakambirana kale, koma yachiwiri ndi batani la 'kukonzanso', lolumikizidwa ndi pini ya RUN. Palibe chilichonse mwa izi chomwe chili chofunikira kwambiri (ngakhale batani la BOOTSEL liyenera kusinthidwa ndi mutu kapena zofananira ngati USB boot mode ikufunika), ndipo imatha kuchotsedwa ngati malo kapena mtengo uli wodetsedwa, koma amapangitsa kugwiritsa ntchito RP2350 kutali. zambiri zosangalatsa.

Zowonjezera A: Mtundu Wathunthu wa Schematic -RP2350A

Chithunzi 15. Kukonzekera kwathunthu kwa Minimal Design kwa RP2350A

Zowonjezera B: Mtundu Wathunthu wa Schematic -RP2350B

Chithunzi 16. Kukonzekera kwathunthu kwa Kapangidwe Kochepa ka RP2350B

Zowonjezera H: Mbiri Yotulutsa Zolemba

Ogasiti 8 2024
Kutulutsidwa koyamba.

ndi Raspberry Pi
Raspberry Pi ndi chizindikiro cha Raspberry Pi Ltd
Malingaliro a kampani Raspberry Pi Ltd

Zolemba / Zothandizira

Raspberry Pi SC1631 Raspberry Microcontroller [pdf] Buku la Malangizo SC1631 Raspberry Microcontroller, SC1631, Raspberry Microcontroller, Microcontroller

Maumboni

• Buku Logwiritsa Ntchito