Quectel QuecOpen AG525R-GL Hardware Design page 69

ADC0 Voltage Range
ADC1 Voltage Range
ADC2 Voltage Range
ADC Resolution
ADC Sample Rate
NOTES
1. The input voltage for each ADC interface must not exceed its corresponding voltage range.
2. It is prohibited to supply any voltage to ADC pins when VBAT is removed.
3. It is recommended to use resistor divider circuit for ADC application.
3.18. USB_BOOT Interface
The module provides a USB_BOOT pin. Pulling up the USB_BOOT to VDD_EXT before powering on the
module will force the module into emergency download mode when powered on. In emergency download
mode, the module supports firmware upgrade over USB 2.0 interface.
Table 26: Pin Definition of USB_BOOT Interface
Pin Name Pin No.
USB_BOOT 83
The following figure shows a reference circuit of USB_BOOT interface.
AG525R-GL_QuecOpen_Hardware_Design
0
0
0
I/O Description
Force the module into emergency
DI
download mode
Figure 30: Reference Circuit of USB_BOOT Interface
Automotive Module Series
AG525R-GL QuecOpen Hardware Design
1.875
1.875
1.875
14
4.8
V
V
V
bits
MHz
Comment
1.8 V power domain.
Active high.
If unused, keep it open.
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