LCD WIKI E32R32P, E32N32P 3.2inch IPS ESP32-32E 
Ratidza Module User Manual

Iyo resource directory inoratidzwa mumufananidzo unotevera:

Mufananidzo 1.1 Chigadzirwa Ruzivo Pack catalog

Ratidza module software yekuvandudza matanho ndeaya anotevera:

A. Vaka ESP32 papuratifomu software yekuvandudza nharaunda;
B. kana zvichidikanwa, unza wechitatu-bato software maraibhurari sehwaro hwebudiriro;
C. vhura purojekiti yesoftware kuti igadziriswe, unogona zvakare kugadzira chirongwa chitsva chesoftware;
D. simba pane yekuratidzira module, unganidza uye dhawunirodha chirongwa chekugadzirisa, uye wozotarisa iyo software inoshanda maitiro;
E. software mhedzisiro haisviki pane zvinotarisirwa, ramba uchigadzirisa kodhi yepurogiramu, uye wozounganidza nekudhawunirodha, kusvika mhedzisiro yasvika pane inotarisirwa;

Kuti uwane rumwe ruzivo nezve matanho apfuura, ona zvinyorwa mu 1-Demo dhairekitori.

3.1. Kupfuuraview yemodule hardware zviwanikwa inoratidzwa
Module hardware zviwanikwa zvinoratidzwa mune zvinotevera manhamba maviri:

Mufananidzo 3.1 Module hardware zviwanikwa 1

Mufananidzo 3.2 Module hardware zviwanikwa 2

Zviwanikwa zvehardware zvinotsanangurwa sezvizvi:

Iyo LCD kuratidza saizi i3.2 inches, mutyairi IC is ST7789, uye resolution ndeye 240 × 320. Iyo ESP32 yakabatana uchishandisa 4-waya SPI yekutaurirana interface.

A. Nhanganyaya kune ST7789 controller

Iyo ST7789 controller inotsigira resolution yepamusoro ye240*320 uye 172800-byte GRAM. Inotsigirawo 8-bit, 9-bit, 16-bit, uye 18-bit parallel port data mabhasi. Iyo zvakare inotsigira 3-waya uye 4-waya SPI serial ports. Sezvo parallel control inoda nhamba huru yeIO ports, inonyanya kuzivikanwa ndeye SPI serial port control. Iyo ST7789 inotsigirawo 65K, 262K RGB kuratidzwa kwemavara, kuratidza ruvara kwakapfuma kwazvo, uku ichitsigira kutenderera kuratidzwa uye kupepeta kuratidza uye kutamba kwevhidhiyo, kuratidza nenzira dzakasiyana siyana.

Iyo ST7789 controller inoshandisa 16bit (RGB565) kudzora pixel kuratidza, saka inogona kuratidza anosvika 65K mavara papixel. Iyo pixel kero yekumisikidza inoitwa mukurongeka kwemitsara nemakoramu, uye iyo inowedzera uye inodzikira nzira inotarwa neiyo scanning mode. Iyo ST7789 nzira yekuratidzira inoitwa nekuseta kero uyezve kuseta kukosha kwemavara.

B. Nhanganyaya kuSPI communication protocol

Iyo yekunyora modhi yenguva ye4-waya SPI bhazi inoratidzwa mumufananidzo unotevera:

Mufananidzo 3.3 Kunyora modhi nguva ye4-waya SPI bhazi

CSX isarudzo yevaranda chip, uye chip inozogoneswa chete kana CSX iri padanho remagetsi rakaderera.
D/CX ndiyo data/command control pini yechip. Kana DCX ichinyora mirairo pamazinga akaderera, data inonyorwa pamazinga akakwirira
SCL ndiyo SPI bhazi wachi, ine yega yega inosimuka ichiendesa 1 bit yedata;
SDA ndiyo data inofambiswa neSPI, iyo inotumira 8 bits yedata kamwechete. Iyo data format inoratidzwa mumufananidzo unotevera:

Mufananidzo 3.4 4 SPI transmission data format

Yakakwira zvishoma kutanga, tumira kutanga.
Pakutaurirana kweSPI, data ine nguva yekufambisa, ine musanganiswa weiyo chaiyo-nguva wachi chikamu (CPHA) uye wachi polarity (CPOL):
Iyo nhanho yeCPOL inosarudza kusashanda mamiriro eiyo serial synchronous wachi, ine CPOL=0, ichiratidza yakaderera mwero. CPOL pair transmission protocol
Hurukuro yacho yakanga isina simba guru;

Kureba kweCPHA kunotarisa kana serial synchronous wachi inounganidza data pane yekutanga kana yechipiri wachi kusvetuka kumucheto,
Kana CPHL=0, ita kuunganidza data padanho rekutanga shanduko;
Kubatanidzwa kwezviviri izvi mafomu mana SPI nzira dzekutaurirana, uye SPI0 inowanzoshandiswa kuChina, uko CPHL=0 uye CPOL=0

2) Resistive Touch Screen
Iyo resistive touch screen ndeye 3.2 inches muhukuru uye yakabatana neXPT2046 control IC kuburikidza nemapini mana: XL, XR, YU, YD.

3) ESP32-WROOM-32E Module
Iyi module ine yakavakirwa-mukati ESP32-DOWD-V3 chip, Xtensa dual-core 32-bit LX6 microprocessor, uye inotsigira wachi mareti kusvika ku240MHz. Iine 448KB ROM, 520KB SRAM, 16KB RTC SRAM, uye 4MB QSPI Flash. 2.4GHz WIFI, Bluetooth V4.2 uye Bluetooth Low power modules inotsigirwa. Ekunze 26 GPIOs, tsigira SD kadhi,
UART, SPI, SDIO, I2C, LED PWM, mota PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI uye mamwe maperipherals.

4) MicroSD Card Slot
Uchishandisa SPI yekutaurirana modhi uye ESP32 yekubatanidza, tsigiro yeMicroSD makadhi eakasiyana siyana.

5) RGB Matatu-Muvara LED
Mwenje tsvuku, girini uye yebhuruu LED inogona kushandiswa kuratidza mamiriro echirongwa.

6) Serial Port
Iyo yekunze serial port module inoshandiswa kune serial port kutaurirana.

7) USB kuSerial Port uye One-Click Dhawunirodha Circuit
Iyo yakakosha mudziyo ndeye CH340C, imwe magumo yakabatana nekombuta USB, imwe magumo yakabatana neESP32 serial port, kuitira kuti uwane USB kune TTL serial port.
Uye zvakare, imwe-tinya-kurodha wedunhu yakasungirirwawo, ndiko kuti, pakurodha chirongwa, inogona otomatiki kupinda iyo yekurodha modhi, pasina chikonzero chekubata nekunze.

8) Battery Interface
Maviri-pini interface, imwe yeyakanaka electrode, imwe yeasina kunaka electrode, pinda mubhatiri magetsi uye kuchaja.

9) Battery Charge uye Discharge Management Circuit
Chishandiso chepakati iTP4054, dunhu iri rinogona kudzora bhatiri yekuchaja ikozvino, bhatiri rakachajwa zvakachengeteka kune saturation state, asi zvakare rinogona kudzora zvakachengeteka kubuda kwebhatiri.

10) BOOT Key
Mushure mekunge module yekuratidzira yabatidzwa, kudzvanya kunodzikisa IO0. Kana iyo nguva iyo module yakabatidzwa kana iyo ESP32 ikagadziridzwa, kudzikisa IO0 kunopinza yekurodha modhi. Mamwe makesi anogona kushandiswa seakajairwa mabhatani.

11) Type-C Interface
Iyo huru yekupa magetsi interface uye chirongwa chekurodha interface yemodhi yekuratidzira. Batanidza USB kune serial port uye tinya-kamwe kurodha wedunhu, inogona kushandiswa kugovera magetsi, kurodha uye serial kutaurirana.

12) 5V kusvika 3.3V Voltage Regulator Circuit
Iyo yakakosha mudziyo ndeye ME6217C33M5G LDO regulator. The voltage regulator circuit inotsigira 2V ~ 6.5V yakafara voltage input, 3.3V yakagadzikana voltage kubuda, uye iyo yakanyanya kubuda ikozvino 800mA, iyo inogona kusangana zvizere nevoltage uye zvazvino zvinodikanwa zvekuratidzira module.

13) RESET Kiyi
Mushure mekunge modhiyo yekuratidzira yabatidzwa, kudzvanya kunodhonza ESP32 reset pini pasi (iyo yakasarudzika mamiriro inodhonza kumusoro), kuitira kuti uwane iyo reset basa.

14) Resistive Touch Screen Control Circuit
Iyo yakakosha mudziyo ndeye XPT2046, iyo inotaurirana neESP32 kuburikidza neSPI.
Iri redunhu ndiro bhiriji pakati peresitive touch screen uye ESP32 tenzi, ane basa rekufambisa iyo data pachiratidziro chekubata kune ESP32 tenzi, kuitira kuti uwane zvinorongeka zvepanobata.

15) Wedzera Pini Inopinza
Iwo maviri asina kushandiswa ekuisa maIO madoko paESP32 module anodhonzwa kuti ashandiswe padivi.

16) Backlight Control Circuit
Iyo yakakosha mudziyo ndeye BSS138 munda maitiro chubhu. Imwe magumo edunhu iri yakabatana nepini yekudzora backlight pane ESP32 tenzi, uye imwe magumo yakabatana neakaipa danda reLCD screen backlight LED l.amp. Backlight control pini dhonza kumusoro, back light, zvikasadaro kure.

17) Mutauri Interface
Wiring terminals dzinofanira kubatanidzwa vertically. Inoshandiswa kuwana mono speaker nema loudspeakers.

18) Audio Power Amplifier Circuit
Iyo yakakosha mudziyo ndeye FM8002E odhiyo amplifier IC. Imwe magumo edunhu iri yakabatana neESP32 odhiyo DAC kukosha kwepini yekubuda uye imwe magumo yakabatana kune iyo nyanga interface. Basa redunhu iri kutyaira nyanga yemagetsi diki kana speaker kuti inzwike. Kune magetsi e5V, iyo yakanyanya dhiraivha simba ndeye 1.5W (mutoro 8 ohms) kana 2W (mutoro 4 ohms).

19) SPI Peripheral Interface
4-waya horizontal interface. Tungamira kunze isina kushandiswa chip pini yekusarudza uye SPI interface pini inoshandiswa neiyo MicroSD kadhi, iyo inogona kushandiswa kune ekunze SPI zvishandiso kana zvakajairika IO ports.

20) I2C Peripheral Interface
4-waya horizontal interface. Tungamira kunze mapini maviri asina kushandiswa kugadzira I2C interface, inogona kushandiswa kune ekunze IIC zvishandiso kana zvakajairika IO ports.

Mufananidzo 3.5 Type-C interface yedunhu

Mudunhu iri, D1 ndiyo Schottky diode, iyo inoshandiswa kudzivirira ikozvino kubva kumashure. D2 kusvika kuD4 ndeye electrostatic surge dziviriro diode kudzivirira iyo yekuratidzira module kubva mukukuvadzwa nekuda kwekuwanda vol.tage kana dunhu pfupi. R1 ndiko kudhonza-pasi kuramba. USB1 ibhazi reType-C. Iyo yekuratidzira module inobatanidza neType-C magetsi ekupa, kurodha zvirongwa, uye serial port kutaurirana kuburikidza ne USB1. Iko +5V neGND zviri positive simba voltage uye masiginecha epasi USB_D- uye USB_D+ akasiyana masaini e USB, ayo anofambiswa kune onboard USB-to-serial wedunhu.

Mufananidzo 3.6 Voltage regulator circuit

Mudunhu iri, C16 ~ C19 ndiyo bypass filter capacitor, iyo inoshandiswa kuchengetedza kugadzikana kweiyo inopinza vol.tage uye goho voltage. Iyo U1 ndeye 5V kusvika 3.3V LDO ine modhi nhamba ME6217C33M5G. Nekuti mazhinji emaseketi padhizaini module anoda 3.3V magetsi, uye simba rekuisa reType-C interface rinonyanya 5V, saka vol.tage regulator shanduko yedunhu inodiwa.

Mufananidzo 3.7 Resistive touch screen control circuit

Mudunhu iri, C25 neC27 ndeye bypass filter capacitors, ayo anoshandiswa kuchengetedza vhoriyamu yekupinda.tage kugadzikana. R22 uye R32 ndiwo anodhonza-up resistors anoshandiswa kuchengetedza iyo default pini mamiriro akakwira. U4 ndiyo XPT2046 control IC, basa reiyi IC ndere kuwana coordination vol.tage kukosha kweiyo touch point yekupikisa kubata screen kuburikidza neX+, X-, Y+, Y- mana mapini, uyezve kuburikidza neADC kutendeuka, kukosha kweADC kunoendeswa kune ESP32 tenzi. Iyo ESP32 tenzi inobva yashandura kukosha kweADC kune pixel coordinate kukosha kwechiratidziro. Iyo XPT2046 inotaurirana neESP32 tenzi kuburikidza nebhazi reSPI, uye nekuti inogovera bhazi reSPI nechiratidziro, chimiro chekugonesa chinodzorwa kuburikidza nepini yeCS. Pini yePEN ipini yekubata-bata, uye nhanho yekupinza yakadzikira kana chiitiko chekubata chikaitika.

Mufananidzo 3.8 USB kune serial port uye kamwe-tinya kurodha wedunhu

Mudunhu iri, U3 ndeye CH340C USB-kune-serial IC, iyo isingade yekunze crystal oscillator kufambisa dhizaini yedunhu. C6 is a bypass sefa capacitor inoshandiswa kuchengetedza vhoriyamu yekupindatage kugadzikana. Q1 neQ2 iNPN mhando nhatu, uye R6 neR7 matriode base inodzikamisa zvinopikisa zvino. Basa redunhu iri kuona USB kune serial port uye kamwechete-tinya kurodha basa. Iyo USB siginecha inopinza uye inobuda kuburikidza neUD+ uye UD- pini, uye inotumirwa kune ESP32 tenzi kuburikidza neRXD uye TXD pini mushure mekutendeuka. Kamwe-tinya kudhawunirodha circuit musimboti:

A. Mapini eRST neDTR eCH340C anobuda mwero wepamusoro nekusarudzika. Panguva ino, iyo Q1 uye Q2 triode haisati yabatidzwa, uye iyo IO0 mapini uye reset mapini eESP32 main control anodhonzwa kusvika padanho repamusoro.
B. Mapini eRST neDTR eCH340C anobudisa mazinga akaderera, panguva ino, Q1 uye Q2 triode haisati yavapo, uye IO0 pini uye mapini ekugadzirisa eESP32 main control achiri kudhonzwa kusvika kumazinga akakwirira.
C. Iyo RST pini yeCH340C inoramba isina kuchinjwa, uye iyo DTR pin inobudisa chikamu chepamusoro. Panguva ino, Q1 ichiri kugurwa, Q2 iripo, iyo IO0 pini yeESP32 tenzi ichiri kudhonzwa kumusoro, uye pini yekumisikidza inodhonzwa pasi, uye ESP32 inopinda munzvimbo yekumisikidza.
D. CH340C's RST pini inoburitsa padanho repamusoro, DTR pin inoburitsa mwero wakaderera, panguva ino Q1 iripo, Q2 yadzimwa, pini yekudzoreredza yeESP32 main control haizongove yakakwirira nekuti yakabatana capacitor inochajwa, ESP32 iri ichiri mune reset state, uye IO0 pini inobva yadhonzwa pasi, panguva ino ichapinda iyo yekurodha modhi.

Mufananidzo 3.9 Audio simba ampLifier circuit

Mudunhu iri, R23, C7, C8 neC9 inoumba RC sefa redunhu, uye R10 neR13 ndiyo inogadzirisa zvigadziriso zvekushanda. amplifier. Kana kukosha kwekupikisa kweR13 kusingashanduki, kuduku kukosha kwekupikisa kweR10, iyo yakakura inzwi remutauri wekunze. C10 uye C11 ndiwo anopinza coupling capacitors. R11 ndiyo inodhonza-up resistor. JP1 ndiyo nyanga/mutauri chiteshi. Iyo U5 ndiyo FM8002E redhiyo simba amplifier IC. Mushure mekuisa neAUDIO_IN, iyo odhiyo yeDAC siginecha ndeye ampinokwenenzverwa neFM8002E kuwana uye kubuda kune mutauri/mutauri nemapini eVO1 neVO2. SHUTDOWN ndiyo pini yekugonesa yeFM8002E. Iyo yakaderera mwero inogoneswa. Nekutadza, chiyero chepamusoro chinogoneswa.

Mufananidzo 3.10 ESP32-WROOM-32E main control circuit

Mudunhu iri, C4 neC5 ibypass filter capacitors, uye U2 iESP32-WROOM-32E modules. Kuti uwane ruzivo rwemukati wedunhu remu module iyi, ndapota tarisa kune zviri pamutemo zvinyorwa.

Mufananidzo 3.11 Key reset circuit

Mudunhu iri, KEY1 ndiyo kiyi, R4 ndiyo inodhonza-up resistor, uye C3 ndiyo inononoka capacitor. Reset musimboti:

A. Mushure memagetsi, C3 inobhadharisa. Panguva ino, C3 yakaenzana nekupfupika kwedunhu, RESET pini yakatsikwa, ESP32 inopinda mumamiriro ekugadzirisa.
B. Kana C3 ichichajwa, C3 yakaenzana nekuvhura dunhu, RESET pini inodhonzwa kumusoro, ESP32 reset yapera, uye ESP32 inopinda munzvimbo yakajairika yekushanda.
C. Kana KEY1 ikatsikirirwa, pini yeRESET inodzika, ESP32 inopinda mumamiriro ekugadzirisa, uye C3 inobudiswa kuburikidza neKEY1.
D. Kana KEY1 yaburitswa, C3 inochajwa. Panguva ino, C3 yakaenzana nepfupi pfupi, RESET pini yakadzikwa, ESP32 ichiri muRESET state. Mushure mekunge C3 yachajwa, pini yekumisikidza inodhonzwa kumusoro, ESP32 inogadzwa patsva uye inopinda munzvimbo yakajairika yekushanda.

Kana iyo RESET isingabudiriri, kukosha kwekushivirira kweC3 kunogona kukwidziridzwa zvakakodzera kuti kunonoke pini reset yakaderera nhanho nguva.

Mufananidzo 3.12 Interface circuit ye ​​serial module

Mudunhu iri, P2 ndeye 4P 1.25mm pitch seat, R29 uye R30 impedance balance resistors, uye Q5 inzvimbo yemumunda inodzora iyo 5V yekupinza magetsi. R31 inodhonza-pasi resistor. Batanidza RXD0 uye TXD0 kune serial pini, uye ipa simba kune mamwe mapini maviri. Chiteshi ichi chakabatana kune imwecheteyo serial port seyepaboard USB-to-serial port module.

Mufananidzo 3.13 Yakawedzerwa IO uye peripheral interface circuits

Mudunhu iri, P3 neP4 4P 1.25mm pitch zvigaro, uye JP3 ndeye 2P 1.25mm pitch zvigaro. R33 uye R34 iI2C pini inodhonza-kumusoro resistors. SPI_CLK, SPI_MISO, SPI_MOSI mapini anogoverwa neMicroSD kadhi SPI mapini. Mapini SPI_CS, IIC_SCL, IIC_SDA, IO35, IO39 haashandiswe ne-on-board zvishandiso, saka anotungamirwa kuti abatanidze SPI neIIC zvishandiso, uye anogona zvakare kushandiswa kune yakajairika IO. Zvinhu zvekutarisira:

A. IO35 neIO39 anogona chete kuva mapini ekuisa;
B. Apo pini yeIIC inoshandiswa kune yakajairika IO, zviri nani kubvisa R33 uye R34 kudhonza-up resistance;

Mufananidzo 3.13 Battery charge uye discharge management circuit

Mudunhu iri, C20, C21, C22 uye C23 zviri bypass filter capacitors. U6 ndiyo TP4054 bhatiri yekuchaja manejimendi IC. R27 inodzora bhatiri yekuchaja ikozvino. JP2 i2P 1.25mm pitch seat, yakabatana nebhatiri. Q3 iP-channel FET. R28 ndeye Q3 grid kudhonza-pasi resistor. TP4054 inochaja bhatiri kuburikidza nepini yeBAT, iyo idiki iyo R27 kuramba, yakakura yekuchaja ikozvino, iyo yepamusoro i500mA. Q3 neR28 pamwe chete dzinoumba bhatiri rekuburitsa dunhu, kana pasina magetsi kuburikidza neType-C interface, iyo +5V vol.tage is 0, ipapo gedhi reQ3 rinodhonzwa pasi kusvika padanho rakaderera, dhiraini uye sosi iripo, uye bhatiri rinopa simba kune yese module yekuratidzira. Kana yaiswa simba kuburikidza neiyo Type-C interface, iyo +5V voltage is 5V, ipapo gedhi reQ3 rakakwirira 5V, dhiraini uye sosi zvakagurwa, uye bhatiri rinopihwa rinokanganiswa.

Mufananidzo 3.14 18P LCD panel wiring welding interface

Mudunhu iri, C24 ndiyo bypass filter capacitor, uye QD1 ndiyo 18P 0.8mm pitch liquid crystal screen welding interface. Iyo QD1 ine pini yekupikisa yekubata sikirini, LCD skrini voltage pin, SPI yekukurukurirana pini, pini yekudzora uye backlight redunhu pini. Iyo ESP32 inoshandisa mapini aya kudzora LCD uye yekubata sikirini.

Mufananidzo 3.15 Dhawunirodha bhatani redunhu

Mudunhu iri, KEY2 ndiyo kiyi uye R5 ndiyo inodhonza-up resistor. IO0 yakakwira nekusarudzika uye yakaderera kana KEY2 yakatsikirirwa. Dzvanya uye ubate KEY2, simba kana kusetazve, uye ESP32 ichapinda yekurodha modhi. Mune zvimwe zviitiko, KEY2 inogona kushandiswa sekiyi yakajairika.

Mufananidzo 3.15 Battery level yekuona sedunhu

Mudunhu iri, R2 neR3 dzine chikamu voltage resistors, uye C1 neC2 zviri bypass filter capacitors. Bhatiri voltageBAT + yekuisa chiratidzo inopfuura nemudivider resistor. BAT_ADC ndiro voltage kukosha kumagumo ese eR3, iyo inotumirwa kune ESP32 tenzi kuburikidza nepini yekupinza, uye yozoshandurwa neADC kuti pakupedzisira uwane bhatiri vol.tage value. The voltage divider inoshandiswa nekuti ESP32 ADC inoshandura yakakwira 3.3V, ukuwo bhatiri saturation vol.tage i4.2V, iyo iri kunze kwepakati. The akawana voltage yakapetwa ne2 ndiro chairo bhatiri voltage.

Mufananidzo 3.16 LCD backlight control circuit

Mudunhu iri, R24 ndiyo inopikisa debugging uye inochengetwa kwenguva pfupi. Q4 ndiyo N-channel field effect chubhu, R25 ndiyo Q4 grid kudhonza-pasi resistor, uye R26 ndiyo backlight ikozvino inomisa resistor. Iyo LCD backlight LED lamp iri mumamiriro akafanana, danda rakanaka rakabatana ne 3.3V, uye danda risina kunaka rinobatanidzwa nekudonha kweQ4. Kana pini yekudzora LCD_BL inoburitsa yakakwira voltage, iyo yekudonhedza uye sosi pole yeQ4 inobatidzwa. Panguva ino, danda rakashata reLCD backlight rakadzikwa, uye backlight LED lamp inobatidzwa uye inoburitsa mwenje. Kana pini yekudzora LCD_BL inoburitsa yakaderera voltage, iyo yekudonha uye sosi yeQ4 yakagurwa, uye iyo isina kunaka backlight yeLCD skrini inomiswa, uye backlight LED l.amp haina kubatidzwa. By default, LCD backlight yakadzimwa. Kuderedza iyo R26 kuramba kunogona kuwedzera kupenya kwakanyanya kweiyo backlight. Pamusoro pezvo, pini yeLCD_BL inogona kuisa chiratidzo chePWM kugadzirisa LCD backlight.

Mufananidzo 3.17 LCD backlight control circuit

Mudunhu iri, LED2 iRGB matatu-ruvara lamp, uye R14~R16 ine mavara matatu lamp ikozvino kumisa resistor. LED2 ine mwenje tsvuku, yegirinhi uye yebhuruu LED, ayo akajairika anode connection, IO16, IO17 uye IO22 mapini matatu ekudzora, anovhenekera mwenje we LED padanho rakaderera uye anodzima mwenje we LED padanho repamusoro.

Mufananidzo 3.18 MicroSD kadhi slot interface yedunhu

Mudunhu rino, SD_CARD1 ndiyo MicroSD kadhi slot. R17 kusvika kuR21 ndiwo anodhonza-up resistors papini yega yega. C26 ndiyo bypass filter capacitor. Iyi interface yedunhu inotora SPI yekutaurirana modhi. Inotsigira yakakwirira-kumhanya kuchengetedza kweMicroSD makadhi.
Ziva kuti iyi interface inogovera bhazi reSPI neSPI peripheral interface.