Nodemcu v3-CH340 Schematic [PDF]

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Nodemcu v3-CH340 sch esp8266



GND



R1



470 RXD0 TXD0



AUTO PROGRAM CIRCUIT



R3



12k GPIO0



R4



12k GPIO2



R5



12k EN



12k GPIO15



C1 100nF



+



C2 100uF TAJB107M006RNJ



VDD3V3



GND GND



C3 10uF



GND



MATTERS NEEDING ATTENTION On every boot/reset/wakeup, GPIO15 MUST keep LOW, GPIO2 MUST keep HIGH. GPIO0 HIGH ->RUN MODE, LOW -> FLASH MODE. When you need to use the sleep mode,GPIO16 and RST should be connected, and GPIO16 will output LOW to reset the system at the time of wakeup.



1 2 3 4 5 6 7



C4 100nF



GND VDDUSB C5 10uF



DCD RI GND D+ DVDD REGIN



RTS CTS



LED1 BLUE



CP2102 GPIO16



nRST R6 0(NC)



21 20 19 18 17 16 15



NC NC NC NC NC NC NC



A



GPIO0



R7 470



R9 470



Use this resistor only in sleep mode S1



S2



KEY_RST/USER GND



KEY_FLASH GND



ACTIVE



12k nRST



R10



DCD RI GND D_P D_N



This LED SHOULD BLUE or WHITE to make sure enough voltage drop



R2 470



8 9 10 11 12 13 14



R8



USB&UART



KEY



GND DTR DSR TXD RXD RTS CTS NC



U1 MTMS MTDI MTCK



29 28 27 26 25 24 23 22



VDD3V3



VBUS RST NC SUSPEND SUSPEND NC NC



VDD3V3



GND DTR DSR



DTR RTS RST GPIO0 1 1 1 1 0 0 1 1 1 0 0 1 0 1 1 0



A



VDD3V3



C6 100nF



B



B VDD3V3



SPI_MOSI/SD_CMD SPI_MISO/SD_D0 GPIO9/SD_D2 ESP_12_E



GPIO1/SPICS1/TXD0 GPIO3/RXD0 GPIO5 GPIO4 GPIO0/SPICS2 GPIO2/TXD1 GPIO15/HSPICS/RTS0/TXD2 SPI_CLK/SD_CLK SPI_INT/SD_D1 GPIO10/SPI_CS/SD_D3



TXD0 RXD0 GPIO5 GPIO4 GPIO0 GPIO2 GPIO15



14 13 12



SPI_CLK SPI_INT GPIO10



ADC_EX



8



RST ADC/TOUT EN GPIO16/WAKE GPIO14/HSPICLK GPIO12/HSPIQ GPIO13/HSPID/CTS0/RXD2



GND



SPI_MOSI 9 SPI_MISO 10 GPIO9 11



ADC 22 21 20 19 18 17 16



VDDUSB



nRST VT1 R11



12k



DTR



S8050



VT2 R14



R12 220k(1%)



U3 1 2 3 4 5



D_N D_P OTG_ID



MTDO



15



1 2 3 4 5 6 7



VDD



U2 nRST ADC EN GPIO16 GPIO14 GPIO12 GPIO13



GND



VCC DD+ ID GND



MH4 MH3 MH2 MH1



9 8 ADC 7 6



R13 100k(1%)



USB_Micro_5S_B 12k



RTS



S8050



GND



GPIO0



GND



GND Use 1% resistor here.



GND



C



C



POWER U4 3 C7



GND



J1 ADC_EX ADC VU VDDUSB SD_D3 GPIO10 SD_D2 GPIO9 SD_D1 SPI_INT SD_CMD SPI_MOSI SD_D0 SPI_MISO SD_CLK SPI_CLK GND VDD3V3 EN nRST GND VIN



VDD3V3 C8 VDDUSB



VDD5V



10uF D1



1



10uF 25V



NCP1117ST33T3G 2 VIN VOUT GND/ADJ



VDD5V



IO-PIN



GND 1N5819/SS14/S4(SOD_323) GND



A0 1 2 3 D12 4 D11 5 6 7 8 9 10 11 12 13 14 15



PIN1 PIN2 PIN3 PIN4 PIN5 PIN6 PIN7 PIN8 PIN9 PIN10 PIN11 PIN12 PIN13 PIN14 PIN15



J2 PIN1 PIN2 PIN3 PIN4 PIN5 PIN6 PIN7 PIN8 PIN9 PIN10 PIN11 PIN12 PIN13 PIN14 PIN15



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15



D0 D1 D2 D3 D4



GPIO16 GPIO5 GPIO4 GPIO0 GPIO2 VDD3V3 GND D5 GPIO14 D6 GPIO12 D7 GPIO13 D8 GPIO15 D9 RXD0 D10 TXD0 GND VDD3V3



TXD1 HSPICLK HSPIQ RXD2 HSPID TXD2 HSPICS GPIO3 GPIO1



THT_Male_P_1x15 THT_Male_P_1x15



D



D



Title Size



Number



Revision



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2018/9/4 Sheet of E:\工作文档\..\Nodemcu V3-340原理图.SchDoc Drawn By: 7



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