Pin Description - Quectel EG91 Series Hardware Design

NOTES
1)
1. PWRKEY output voltage is 0.8V because of the diode drop in the Qualcomm chipset.
2. Keep all RESERVEDpins and unused pins unconnected.
3. GND pads should be connected to ground in the design.
4. Definition of pin 49 and 56 are different amongEG91-E/-NS/-V/-EC and EG91-NA.For more details,
please refer to Table 4.
The following tables show the pin definition and description of EG91.
Table 3: IO Parameters Definition
Type
AI
AO
DI
DO
IO
OD
PI
PO
Table 4: Pin Description
Power Supply
Pin Name Pin No.
VBAT_BB 32, 33
EG91_Hardware_Design

3.3. Pin Description

Description
Analog input
Analog output
Digital input
Digital output
Bidirectional
Open drain
Power input
Power output
I/O Description
Power supply for
PI module's baseband
part
23 / 93
EG91 Hardware Design
DC
Comment
Characteristics
Vmax=4.3V It must be able to
Vmin=3.3V provide sufficient
Vnorm=3.8V current up to 0.8A.
LTE Module Series