LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 21 / 104
VDD_P2
135
PI
SD card power
supply
If an SD card is
used, connect
VDD_P2 to
SD_VDD.
If an eMMC* is used
or SDIO interface is
unused, connect
VDD_P2 to
VDD_EXT.
VDD_EXT
168
PO
Provide 1.8V for
external circuit.
Vnorm=1.8V
I
O
max=50mA
VDD_RF
162
PO
Provide 2.85V for
external RF circuit.
Vnorm=2.85V
I
O
max=120mA
GND
10, 13, 16, 17,
24, 30, 31, 35,
39, 44, 45, 54,
55, 63, 64, 69,
70, 75, 76,
81~84, 89, 90,
92~94, 96~100,
102~106,
108~112,
114~118,
120~126,
128~133, 141,
142, 148, 153,
154, 157, 158,
167, 174, 177,
178, 181, 184,
187, 191, 196,
202~208,
214~299
Ground
Turn on/off
Pin Name
Pin No.
I/O
Description
DC Characteristics Comment
RESET_N
1
DI
Reset the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
1.8V power domain.
Pulled up internally.
Active low.
PWRKEY
2
DI
Turn on/off the
module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
1.8V power domain.
Pulled up internally.
Active low.
