Usb_Boot - Quectel SC206E Series Hardware Design

3.23. USB_BOOT

USB_BOOT is an emergency download interface. You can force the module to enter emergency
download mode by pulling it up to LDO15A_1V8 when the module is turning on. This is an emergency
option when failures such as abnormal start-up or running occur. For firmware upgrade and debugging in
the future, reserve the following reference design.
Table 27: Pin Definition of USB_BOOT Interface
Pin Name Pin No.
USB_BOOT 46
Module
Figure 28: Reference Circuit Design for Emergency Download Interface
SC206E_Series_Hardware_Design
I/O Description
Force the module into emergency
DI
download mode
USB_BOOT
Comment
Force the module to enter
emergency download mode by
pulling this pin up to LDO15A_1V8
when the module is turning on.
LDO15A_1V8
S1
R1
10K
Smart Module Series
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