EC25 Mini PCI reference schematics

IoT Modules LTE Standard Module
1

We are going to integrate EC25 Mini PCIe module to a Raspberry Pi module, for data connection.

These are our questions:

  1. For getting the data connection (ppp) up and running, through USB interface, do we need to still use the UART interfaces (COEX UART and the other full UART)?
  2. We assume, that when we power up the module and connect the USB on to the host (Raspberry Pi), it should create a couple of interfaces, where one can be used to configure the module with sending AT commands and one of them is to bind with the ppp connection for data?
  3. Is there a reference schematics build around the EC25 PCIe board (that is, a schematics that shows how the EC25 Mini PCIe is interfaced to another host)?
  4. Can we leave the following signals unconnected and just the USB interface connected and get the module up and running with data?
    a. COEX_UART_RX
    b. COEX_UART_TX
    c. UART_RX
    d. UART_TX
    e. UART_RTS
    f. UART_CTS
    g. DTR

Also, is there any document that gives us the complete instructions, how to install the linux drivers and start the data service (ppp) on a Linux machine (Raspberry Pi), when the EC25 Mini PCIe is connected to the host machine through USB?

Dinesh.

2

Hello:

If USB communication is normal, you can use no serial port, just USB and EC25 module communication can be. As you said, you need to install the drivers for your environment

微信图片_20221012165443

3

Thanks for your reply.

Does this mean, we can leave the following pins unconnected (not even pull up resistors) on the Mini PCIe module?

a. COEX_UART_RX
b. COEX_UART_TX
c. UART_RX
d. UART_TX
e. UART_RTS
f. UART_CTS
g. DTR
h. PCM audio signals
i. I2C signals

Thanks,
Dinesh.