ESP32-PICO-D4 Wireless SIP

27 October 2022 - 0 Comments

ESP32-PICO-D4 SIP

ESP32-PICO-D4 Pinout

ESP32-PICO-D4 is an ESP32-based System-in-Package (SIP) from Espressif. The new ESP32-PICO-D4 SIP combines an ESP32 SoC, crystal oscillator, filter capacitors, RF matching links, and 4MB flash, into a single 7mm × 7mm QFN package. Including the passive components in the design means that the new QFN package needs very little external support to be used on our own PCB. With its ultra-small size, robust performance, and low-energy consumption, ESP32-PICO-D4 is well suited for any space-limited or battery-operated applications, such as wearable electronics, medical equipment, sensors, and other IoT products.

ESP32-PICO-D4 Pinout Configuration

No.	Name	Type	Function
1	VDDA	P	Analog Power Supply (2.3V ~ 3.6V)
2	LNA_IN	I/O	RF Input and Output
3	VDDA3P3	P	Analog power supply (2.3 V ~ 3.6 V)
4	VDDA3P3	P	Analog power supply (2.3 V ~ 3.6 V)
5	SENSOR_VP	I	GPIO36, ADC1_CH0, RTC_GPIO0
6	SENSOR_CAPP	I	GPIO37, ADC1_CH1, RTC_GPIO1
7	SENSOR_CAPN	I	GPIO38, ADC1_CH2, RTC_GPIO2
8	SENSOR_VN	I	GPIO39, ADC1_CH3, RTC_GPIO3
9	EN	I	High: On; enables the module Low: Off; the module powers off Note: Do not leave this pin floating.
10	IO34	I	GPIO34, ADC1_CH6, RTC_GPIO4
11	IO35	I	GPIO35, ADC1_CH7, RTC_GPIO5
12	IO32	I/O	GPIO32, 32K_XP (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9
13	IO33	I/O	GPIO33, 32K_XN (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8
14	IO25	I/O	GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
15	IO26	I/O	GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
16	IO27	I/O	GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
17	IO14	I/O	GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2
18	IO12	I/O	GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3
19	VDD3P3_RTC	P	Input power supply for RTC IO (3.0 V ~ 3.6 V)
20	IO13	I/O	GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER
21	IO15	I/O	GPIO15, ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0, HS2_CMD, SD_CMD, EMAC_RXD3
22	IO2	I/O	GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0
23	IO0	I/O	GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK
24	IO4	I/O	GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER
25	IO16	I/O	GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
26	VDD_SDIO	P	Output power supply.
27	IO17	I/O	GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
28	SD2	I/O	GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD
29	SD3	I/O	GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD
30	CMD	I/O	GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS
31	CLK	I/O	GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS
32	SD0	I/O	GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS
33	SD1	I/O	GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS
34	IO5	I/O	GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
35	IO18	I/O	GPIO18, VSPICLK, HS1_DATA7
36	IO23	I/O	GPIO23, VSPID, HS1_STROBE
37	VDD3P3_CPU	P	Input power supply for CPU IO (1.8 V ~ 3.6 V)
38	IO19	I/O	GPIO19, VSPIQ, U0CTS, EMAC_TXD0
39	IO22	I/O	GPIO22, VSPIWP, U0RTS, EMAC_TXD1
40	U0RXD	I/O	GPIO3, U0RXD, CLK_OUT2
41	U0TXD	I/O	GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2
42	IO21	I/O	GPIO21, VSPIHD, EMAC_TX_EN
43	VDDA	P	Analog power supply (2.3 V ~ 3.6 V)
44	XTAL_N_NC	-	NC
45	XTAL_P_NC	-	NC
46	VDDA	P	Analog power supply (2.3 V ~ 3.6 V)
47	CAP2_NC	-	NC
48	CAP1_NC	-	NC

ESP32-PICO-D4 Features and Specifications

MCU

ESP32 embedded, Xtensa® dual-core 32-bit LX6 microprocessor, up to 240 MHz
448 KBROMfor booting and core functions
520 KBSRAMfor data and instructions
16KBSRAMinRTC

Wi-Fi

802.11 b/g/n
Bit rate: 802.11n up to 150 Mbps
A-MPDU and A-MSDU aggregation
0.4 µs guard interval support
Center frequency range of operating channel: 2412 ~ 2484 MHz

Bluetooth®

Bluetooth V4.2 BR/EDR and Bluetooth LE specification 1.2 Description
Class-1, class-2 and class-3 transmitter
AFH
CVSDand SBC

Hardware

Interfaces: ADC, DAC, touch sensor, SD/SDIO/MMC Host Controller, SPI, SDIO/SPI Slave Controller, EMAC, motor PWM, LED PWM, UART, I2C, I2S, infrared remote controller, GPIO, pulse counter
40MHzcrystal oscillator
8MBSPIflash
Operating voltage/Power supply: 3.0 ~ 3.6 V
Operating temperature range:–40 ~ 85 °C
Dimensions: (7 × 7 × 1.11) mm

Where to use ESP32 Wi-Fi & Bluetooth MCU

The ESP32 at the heart of the package has a Tensilica Xtensa dual-core 32-bit LX6 microprocessor, with 448KB of ROM and 520KB of SRAM (including 8KB of RTC memory), and a 1KB eFuse. The SIP module integrates 4MB of SPI Flash memory, although as the ESP32 can support up to 16MB it’s possible we might see that in future revisions. Wireless connectivity support is 802.11 b/g/n/e/i (802.11n up to 150 Mbps), alongside Bluetooth V4.2 (BR/EDR and Bluetooth LE support).

The module interfaces include an SD card, UART, SPI, SDIO, LED PWM, Motor PWM, I2S, I2C, IR, as well as GPIO, capacitive touch sensor, ADC, DAC, and an LNA pre-amplifier. The chip also has two onboard sensors—a Hall sensor to detect magnetic fields, and a temperature sensor. Its small footprint and reduced number of external components make it perfectly suited for wearables and other Internet of Things devices.

ESP32-Pico-D4 Module Interface Circuit

Note: Complete technical details can be found in the ESP32-PICO-D4 datasheet at this page’s end.

ESP32-PICO-D4 Module Schematics

The schematics below show the internal schematics of ESP32-PICO-D4 SIP.

ESP32-Pico-D4 SIP Schematic Diagram

How To Use ESP32-PICO-D4 SIP?

This is the typical application circuit of the SiP connected with peripheral components (for example, power supply, antenna, reset button, JTAG interface, and UART interface).

ESP32-PICO-D4 SIP Peripheral Components

Applications

Generic Low-power IoT Sensor Hub
Generic Low-power IoT Data Loggers
Cameras for Video Streaming
Over-the-top (OTT) Devices
Speech Recognition
Image Recognition
Mesh Network
Home Automation
Smart Building
Industrial Automation
Smart Agriculture
Audio Applications
Health Care Applications
Wi-Fi-enabled Toys
Wearable Electronics
Retail & Catering Applications

2D-Model and Dimensions

If you are designing a PCB or Perf board with this component, then the following picture from the Datasheet will be useful to know its package type and dimensions.

ESP32-PICO-D4-SIP Dimensions