1ESP32-PICO-KIT V4 / V4.1 Getting Started Guide 2============================================== 3:link_to_translation:`zh_CN:[中文]` 4 5This guide shows how to get started with the ESP32-PICO-KIT V4 / V4.1 mini development board. For the description of other ESP32-PICO-KIT versions, please check :doc:`../../hw-reference/index`. 6 7This particular description covers ESP32-PICO-KIT V4 and V4.1. The difference is the upgraded USB-UART bridge from CP2102 in V4 with up to 1 Mbps transfer rates to CP2102N in V4.1 with up to 3 Mbps transfer rates. 8 9 10What You Need 11------------- 12 13* :ref:`ESP32-PICO-KIT mini development board <get-started-pico-kit-v4-board-front>` 14* USB 2.0 A to Micro B cable 15* Computer running Windows, Linux, or macOS 16 17You can skip the introduction sections and go directly to Section `Start Application Development`_. 18 19 20Overview 21-------- 22 23ESP32-PICO-KIT is an ESP32-based mini development board produced by `Espressif <https://espressif.com>`_. 24 25The core of this board is ESP32-PICO-D4 - a System-in-Package (SiP) module with complete Wi-Fi and Bluetooth functionalities. Compared to other ESP32 modules, ESP32-PICO-D4 integrates the following peripheral components in one single package, which otherwise would need to be installed separately: 26 27- 40 MHz crystal oscillator 28- 4 MB flash 29- Filter capacitors 30- RF matching links 31 32This setup reduces the costs of additional external components as well as the cost of assembly and testing and also increases the overall usability of the product. 33 34The development board features a USB-UART Bridge circuit which allows developers to connect the board to a computer's USB port for flashing and debugging. 35 36All the IO signals and system power on ESP32-PICO-D4 are led out to two rows of 20 x 0.1" header pads on both sides of the development board for easy access. For compatibility with Dupont wires, 2 x 17 header pads are populated with two rows of male pin headers. The remaining 2 x 3 header pads beside the antenna are not populated. These pads may be populated later by the user if required. 37 38.. note:: 39 40 1. The 2 x 3 pads not populated with pin headers are connected to the flash memory embedded in the ESP32-PICO-D4 SiP module. For more details see module's datasheet in `Related Documents`_. 41 2. ESP32-PICO-KIT comes with male headers by default. 42 43Functionality Overview 44---------------------- 45 46The block diagram below shows the main components of ESP32-PICO-KIT and their interconnections. 47 48.. figure:: ../../../_static/esp32-pico-kit-v4-functional-block-diagram.png 49 :align: center 50 :alt: ESP32-PICO-KIT functional block diagram 51 :figclass: align-center 52 53 ESP32-PICO-KIT block diagram 54 55 56Functional Description 57---------------------- 58 59The following figure and the table below describe the key components, interfaces, and controls of the ESP32-PICO-KIT board. 60 61.. _get-started-pico-kit-v4-board-front: 62 63.. figure:: ../../../_static/esp32-pico-kit-v4.1-f-layout.jpeg 64 :align: center 65 :alt: ESP32-PICO-KIT board layout 66 :figclass: align-center 67 68 ESP32-PICO-KIT board layout 69 70Below is the description of the items identified in the figure starting from the top left corner and going clockwise. 71 72================== ================================================================================================================================= 73Key Component Description 74================== ================================================================================================================================= 75ESP32-PICO-D4 Standard ESP32-PICO-D4 module soldered to the ESP32-PICO-KIT board. The complete ESP32 system on a chip (ESP32 SoC) has been integrated into the SiP module, requiring only an external antenna with LC matching network, decoupling capacitors, and a pull-up resistor for EN signals to function properly. 76 77LDO 5V-to-3.3V Low dropout voltage regulator (LDO). 78 79USB-UART bridge Single-chip USB-UART bridge: CP2102 in V4 provides up to 1 Mbps transfer rates and CP2102N in V4.1 offers up to 3 Mbps transfers rates. 80 81Micro USB Port USB interface. Power supply for the board as well as the communication interface between a computer and the board. 82 835V Power On LED This red LED turns on when power is supplied to the board. For details, see the schematics in `Related Documents`_. 84 85I/O All the pins on ESP32-PICO-D4 are broken out to pin headers. You can program ESP32 to enable multiple functions, such as PWM, ADC, DAC, I2C, I2S, SPI, etc. For details, please see Section `Pin Descriptions`_. 86 87BOOT Button Download button. Holding down **Boot** and then pressing **EN** initiates Firmware Download mode for downloading firmware through the serial port. 88 89EN Button Reset button. 90================== ================================================================================================================================= 91 92 93Power Supply Options 94-------------------- 95 96There are three mutually exclusive ways to provide power to the board: 97 98* Micro USB port, default power supply 99* 5V / GND header pins 100* 3V3 / GND header pins 101 102.. warning:: 103 104 The power supply must be provided using **one and only one of the options above**, otherwise the board and/or the power supply source can be damaged. 105 106 107Pin Descriptions 108---------------- 109 110The two tables below provide the **Name** and **Function** of I/O header pins on both sides of the board, see :ref:`get-started-pico-kit-v4-board-front`. The pin numbering and header names are the same as in the schematic given in `Related Documents`_. 111 112 113Header J2 114""""""""" 115 116====== ================= ====== ====================================================== 117No. Name Type Function 118====== ================= ====== ====================================================== 1191 FLASH_SD1 (FSD1) I/O | GPIO8, SD_DATA1, SPID, HS1_DATA1 :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U2CTS 1202 FLASH_SD3 (FSD3) I/O | GPIO7, SD_DATA0, SPIQ, HS1_DATA0 :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U2RTS 1213 FLASH_CLK (FCLK) I/O | GPIO6, SD_CLK, SPICLK, HS1_CLK :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U1CTS 1224 IO21 I/O | GPIO21, VSPIHD, EMAC_TX_EN 1235 IO22 I/O | GPIO22, VSPIWP, U0RTS, EMAC_TXD1 1246 IO19 I/O | GPIO19, VSPIQ, U0CTS, EMAC_TXD0 1257 IO23 I/O | GPIO23, VSPID, HS1_STROBE 1268 IO18 I/O | GPIO18, VSPICLK, HS1_DATA7 1279 IO5 I/O | GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK 12810 IO10 I/O | GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD 12911 IO9 I/O | GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD 13012 RXD0 I/O | GPIO3, U0RXD :ref:`(See 3) <get-started-pico-kit-v4-pin-notes>` , CLK_OUT2 13113 TXD0 I/O | GPIO1, U0TXD :ref:`(See 3) <get-started-pico-kit-v4-pin-notes>` , CLK_OUT3, EMAC_RXD2 13214 IO35 I | ADC1_CH7, RTC_GPIO5 13315 IO34 I | ADC1_CH6, RTC_GPIO4 13416 IO38 I | GPIO38, ADC1_CH2, RTC_GPIO2 13517 IO37 I | GPIO37, ADC1_CH1, RTC_GPIO1 13618 EN I | CHIP_PU 13719 GND P | Ground 13820 VDD33 (3V3) P | 3.3V power supply 139====== ================= ====== ====================================================== 140 141 142Header J3 143""""""""" 144 145====== ================= ====== ====================================================== 146No. Name Type Function 147====== ================= ====== ====================================================== 1481 FLASH_CS (FCS) I/O | GPIO16, HS1_DATA4 :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U2RXD, EMAC_CLK_OUT 1492 FLASH_SD0 (FSD0) I/O | GPIO17, HS1_DATA5 :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U2TXD, EMAC_CLK_OUT_180 1503 FLASH_SD2 (FSD2) I/O | GPIO11, SD_CMD, SPICS0, HS1_CMD :ref:`(See 1) <get-started-pico-kit-v4-pin-notes>` , U1RTS 1514 SENSOR_VP (FSVP) I | GPIO36, ADC1_CH0, RTC_GPIO0 1525 SENSOR_VN (FSVN) I | GPIO39, ADC1_CH3, RTC_GPIO3 1536 IO25 I/O | GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0 1547 IO26 I/O | GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1 1558 IO32 I/O | 32K_XP :ref:`(See 2a) <get-started-pico-kit-v4-pin-notes>` , ADC1_CH4, TOUCH9, RTC_GPIO9 1569 IO33 I/O | 32K_XN :ref:`(See 2b) <get-started-pico-kit-v4-pin-notes>` , ADC1_CH5, TOUCH8, RTC_GPIO8 15710 IO27 I/O | GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17 158 | EMAC_RX_DV 15911 IO14 I/O | ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, 160 | HS2_CLK, SD_CLK, EMAC_TXD2 16112 IO12 I/O | ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI :ref:`(See 4) <get-started-pico-kit-v4-pin-notes>` , HSPIQ, 162 | HS2_DATA2, SD_DATA2, EMAC_TXD3 16313 IO13 I/O | ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, 164 | HS2_DATA3, SD_DATA3, EMAC_RX_ER 16514 IO15 I/O | ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0 166 | HS2_CMD, SD_CMD, EMAC_RXD3 16715 IO2 I/O | ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, 168 | HS2_DATA0, SD_DATA0 16916 IO4 I/O | ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, 170 | HS2_DATA1, SD_DATA1, EMAC_TX_ER 17117 IO0 I/O | ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 172 | EMAC_TX_CLK 17318 VDD33 (3V3) P | 3.3V power supply 17419 GND P | Ground 17520 EXT_5V (5V) P | 5V power supply 176====== ================= ====== ====================================================== 177 178 179.. _get-started-pico-kit-v4-pin-notes: 180 181The following notes give more information about the items in the tables above. 182 183 1. This pin is connected to the flash pin of ESP32-PICO-D4. 184 2. 32.768 kHz crystal oscillator: 185 a) input 186 b) output 187 3. This pin is connected to the pin of the USB bridge chip on the board. 188 4. The operating voltage of ESP32-PICO-KIT’s embedded SPI flash is 3.3V. Therefore, the strapping pin MTDI should hold bit zero during the module power-on reset. If connected, please make sure that this pin is not held up on reset. 189 190 191Start Application Development 192----------------------------- 193 194Before powering up your ESP32-PICO-KIT, please make sure that the board is in good condition with no obvious signs of damage. 195 196After that, proceed to :doc:`../../get-started/index`, where Section :ref:`get-started-step-by-step` will quickly help you set up the development environment and then flash an example project onto your board. 197 198 199Board Dimensions 200---------------- 201 202The dimensions are 52 x 20.3 x 10 mm (2.1" x 0.8" x 0.4"). 203 204.. figure:: ../../../_static/esp32-pico-kit-v4.1-dimensions-back.jpg 205 :align: center 206 :alt: ESP32-PICO-KIT dimensions - back 207 :figclass: align-center 208 209 ESP32-PICO-KIT dimensions - back 210 211.. figure:: ../../../_static/esp32-pico-kit-v4-dimensions-side.jpg 212 :align: center 213 :alt: ESP32-PICO-KIT V4 dimensions - side 214 :figclass: align-center 215 216 ESP32-PICO-KIT dimensions - side 217 218For the board physical construction details, please refer to its Reference Design listed below. 219 220 221Related Documents 222----------------- 223 224* `ESP32-PICO-KIT V4 schematic <https://dl.espressif.com/dl/schematics/esp32-pico-kit-v4_schematic.pdf>`_ (PDF) 225* `ESP32-PICO-KIT V4.1 schematic <https://dl.espressif.com/dl/schematics/esp32-pico-kit-v4.1_schematic.pdf>`_ (PDF) 226* `ESP32-PICO-KIT Reference Design <https://www.espressif.com/en/support/download/documents?keys=ESP32-PICO-KIT+Reference+Design>`_ containing OrCAD schematic, PCB layout, gerbers and BOM 227* `ESP32-PICO-D4 Datasheet <http://espressif.com/sites/default/files/documentation/esp32-pico-d4_datasheet_en.pdf>`_ (PDF) 228* :doc:`../../hw-reference/index` 229 230 231.. toctree:: 232 :hidden: 233 234 get-started-pico-kit-v3 235
