Usb_Boot Interface - Quectel EC200A Series Hardware Design

4.2. USB_BOOT Interface

The module provides a USB_BOOT pin. You can pull up USB_BOOT to VDD_EXT before powering on
the module, thus the module will enter emergency download mode when powered on. In this mode, the
module supports firmware upgrade over USB interface.
Table 13: Pin Definition of USB_BOOT Interface
Pin Name
USB_BOOT
The following figure shows a reference circuit of USB_BOOT interface.
Pin No. I/O
115 DI
Module
USB_BOOT
TVS
Figure 17: Reference Circuit of USB_BOOT Interface
Description
Forces the module to enter
download mode
Test point
4.7K
Close to test point
LTE Standard Module Series
Comment
1.8 V power domain.
Active High.
It is recommended to
reserve test points.
VDD_EXT