Product Info

LTE Module Series
AG35-QuecOpen
Hardware Design
AG35-QuecOpen_Hardware_Design 79 / 137
Table 36: Pin Definition of USB_BOOT Interface
Pin Name Pin No. I/O Description Comment
COEX_
UART_RX/
USB_BOOT
146 DI
Force the module to enter into
emergency download mode
1.8V power domain.
Active high.
If unused, keep it open.
The following figure shows a reference circuit of USB_BOOT interface.
Figure 35: Reference Circuit of USB_BOOT Interface
3.22. RTC
AG35-Quecopen has a real time clock within the PMIC, but has no dedicated RTC power supply pin.
The RTC is powered by VBAT_BB. If VBAT_BB is removed, the RTC will not be maintained.
If RTC needs to be maintained, then VBAT_BB must be powered all the time.
NOTE