Quectel BG77 - Pin Description

LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 17 / 76
3. ADC input voltage must not exceed 1.8V
4. The input voltage range of USB_VBUS is 1.3V~1.8V.
5. Keep all RESERVED pins and unused pins unconnected.
6. GND pins should be connected to ground in the design.
7. W_DISABEL#, AP_READY, USIM_DET, PCM, I2C, GRFC and GPIO functions are under
development.
8. SPI_MOSI(pin40), NETLIGHT(pin79) and GPRC1(pin83) are BOOT_CONFIG pins, They should not
be pulled up before startup.
3.2. Pin Description
The following tables show the pin definition and description of BG77.
Table 3: Definition of I/O Parameters
Table 4: Pin Description
Type Description
AI Analog Input
AO Analog Output
DI Digital Input
DO Digital Output
IO Bidirectional
OD Open Drain
PI Power Input
PO Power Output
Power Supply
Pin Name
Pin
No.
I/O Description DC Characteristics Comment
VBAT 19, 20 PI
Power supply
for the module
Vmax=4.8V
Vmin=2.6V
Vnorm=3.3V