Introduction to EG91X Evaluation Board

Supported Module List

Feature List

Basic Overview

The QuecPython_EG91X series C1-P02 evaluation board is a compact and portable "pocket-sized" board designed specifically for QuecPython.

The main equipped modules are the EG915U series LTE Cat 1 wireless communication modules, which are also compatible with Quectel's EG91 series, EG95 series, BG95 series, and BG96 modules in terms of packaging. This allows for seamless switching between 2G and 4G networks to meet the application requirements of different industries.

The evaluation board has a built-in Type-C interface, making it convenient for development. Developers only need a USB Type-C cable to easily use the evaluation board.

Additionally, the evaluation board is compatible with the expansion board of Raspberry Pi Zero, which can be directly used on the evaluation board.

Evaluation Board Resources

Function Description

The main component and interface placement of the evaluation board is shown in the following figure:


Evaluation board dimensions:


The main pin placement of the evaluation board is shown in the following figure:


For more information about the evaluation board, please visit

Evaluation Board Configuration

The detailed assignment of the peripheral interfaces on the evaluation board is as follows:

No. Name Model Silkscreen Comment
1 USB Type-C Interface - - -
2 SIM Card Slot 1 SMN-315-ARP7 SIM1 Nano-SIM
3 SIM Card Slot 2 MUP-C7809-1 SIM2 E-SIM
4 SD Card Slot TF-101A-P3 SD 2.0 Before using the SD card, enable SD to provide power to the SD card in the 10-Pin Header.
5 USB Power Supply Switch - USB_ON/OFF When the switch is normally closed, Type-C supplies power to the module and evaluation board, and USB can be connected normally. When the USB switch is normally open, Type-C supplies power only to the evaluation board. In this case, the module is not powered.
6 MIPI Interface - MIPI_DSI When the main module is EG91X series, it supports MIPI LCD and is fully compatible with Raspberry Pi peripherals.
7 Camera Interface - - The evaluation board supports customized SPI cameras with a maximum of 300,000 pixels.
8 MIC&SPK Interface AW8733A- +MIC-/-SPK+ -
9 40-Pin Header - - Onboard 40-Pin header; For details, see the above figure and table.
10 10-Pin Header - - Onboard 10-Pin header; For details, see the above figure and table.
11 ADC Interface - ADC1_IN ADC testing interface
12 PWK Botton - PWK Turn-on button
13 RST Button - RST Reset button
14 BOOT Button - BOOT Firmware burning button
15 Antenna Interfaces - LTE
LTE antenna connector
DIV/Wi-Fi/Bluetooth antenna connector
GNSS antenna connector

The evaluation board has 5 functional indication LEDs, as follows:

  • P21: Power indication LED.
  • PSM: Module Pin 1, PSM indication LED.
  • SCK1: SIM1 detection indication LED, lights up when SIM1 is inserted.
  • SCK2: SIM2 detection indication LED, lights up when SIM2 is inserted.
  • PWR: Power indication LED.

The positions of the above indication LEDs refer to the silkscreen on the top of the evaluation board mentioned in the previous text (the side where the module is located is the top).

Evaluation Board Interfaces

Pin Assignment of 10-Pin Header

Header No. Silkscreen Function
10-Pin 3 VDD_EXT 1.8 V
10-Pin 5 MODULE_EN 3.8 V
10-Pin 6 MODULE_EN 3.8 V
10-Pin 7 SD_EN SD_EN
10-Pin 8 SD_EN 3.3 V
10-Pin 9 GNSS_EN 3.3 V
  • 1 & 2: Auto turn on
  • 3 & 4: Provide power externally when connected and test power consumption when disconnected
  • 5 & 6: Connect DCDC to power the module
  • 7 & 8: Enable SD power supply
  • 9 & 10: Enable GNSS active power supply

When testing power consumption, make sure to switch off the USB power supply switch (USB_ON/OFF) on the back of the evaluation board.

Singular-pin Assignment of 40-Pin Header

No Name Function Multiplexing Function NO Name Function Multiplexing Function
1 3V3 - 3.3 V Output 2 5V - 5 V Output
I2C1 Data
General Purpose Input/Output
4 5V - 5 V Output
I2C1 Clock
General Purpose Input/Output
6 GND - Ground
7 P92 GPIO30 General Purpose Input/Output 8 TXD UART1_TXD UART1 Send
9 GND - Ground 10 RXD UART1_RXD UART1 Recv
11 P116 GPIO41 General Purpose Input/Output 12 P05 GPIO2
General Purpose Input/Output
SPI1 Chip Select
13 P16 GPIO24 General Purpose Input/Output 14 GND - Ground
15 P42 GPIO26 General Purpose Input/Output 16 P21 GPIO17 General Purpose Input/Output
17 3V3 - 3.3 V Output 18 P111 GPIO38 General Purpose Input/Output
SPI0 Master Output Slave Input
General Purpose Input/Output
20 GND - Ground
SPI0 Master Input Slave Output
General Purpose Input/Output
22 P37 GPIO23 General Purpose Input/Output
SPI0 Clock
General Purpose Input/Output
24 CS0 SPI0_CS
SPI0 Chip Select
General Purpose Input/Output
25 GND - Ground 26 P83 GPIO28 General Purpose Input/Output
27 P85 GPIO18 General Purpose Input/Output 28 P86 GPIO19 General Purpose Input/Output
29 P84 GPIO29 General Purpose Input/Output 30 GND - Ground
31 P104 GPIO34 General Purpose Input/Output 32 P20 GPIO16
General Purpose Input/Output
PWM0 Output
33 P105 GPIO35 General Purpose Input/Output 34 GND - Ground
35 P07 GPIO04
General Purpose Input/Output
SPI1 Master Input Slave Output
36 P106 GPIO36 General Purpose Input/Output
37 P108 GPIO37 General Purpose Input/Output 38 P06 GPIO3
General Purpose Input/Output
SPI1 Master Output Slave Input
39 GND - Ground 40 P04 GPIO1
General Purpose Input/Output
SPI1 Clock

Getting Started Preparation

First, you need a computer running Windows 10 or above.

  • Step 1: Connect the Evaluation Board

Connect the evaluation board to the computer's USB port using a USB Type-C cable for power supply.

  • Step 2: Turn On the Development Board

Long press the PWRKEY button to turn on the board. Before pressing the PWRKEY button, make sure the power supply voltage is stable. It is recommended to have a time interval of not less than 30 ms between powering up and pressing the PWRKEY button. If you want the board to power up and turn on automatically without the need for a turn-off function, you can directly short the two pins with PWK_AUTO silkscreen on the 10-Pin header.

After performing the above operations, wait for the power indication LED on the board to light up (the silkscreen on the board indicates the PWR LED, refer to the previous section on indication LEDs).

If the PWR LED lights up, the board has been successfully turned on

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