UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
UC200T-EM_Hardware_Design 42 / 68
Table 23: Pin Definition of USB_BOOT Interface
The following figure shows a reference circuit of USB_BOOT interface.
Module
USB_BOOT
VDD_EXT
4.7K
Test point
TVS
Close to test point
Figure 20: Reference Circuit of USB_BOOT Interface
Pin Name
Pin No. I/O
Description
Comment
USB_BOOT 115
DI
Force the module to enter into
emergency download mode
1.8V power domain. Active high.
It is recommended to reserve test
point.