User's Manual

LTE Module Series
EC25Hardware Design
EC25_Hardware_DesignConfidential / Released 26 / 90
FC20 module. V
IH
min=1.2V
V
IH
max=2.0V
If unused, keep it
open.
WLAN_EN 136 DO
WLAN function
control via FC20
module
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
Active high.
If unused, keep it
open.
COEX_UART
_RX
137 DI
LTE/WLAN&BT
coexistence signal
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
COEX_UART
_TX
138 DO
LTE/WLAN&BT
coexistence signal
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
WLAN_SLP_
CLK
118 DO WLAN sleep clock
If unused, keep it
open.
BT_RTS* 37 DI
BT UART request to
send
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
BT_TXD* 38 DO
BT UART transmit
data
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
BT_RXD* 39 DI
BT UART receive
data
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
BT_CTS* 40 DO
BT UART clear to
send
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
BT_EN* 139 DO
BT function control
via FC20 module
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
RF Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
ANT_DIV 35 AI Diversity antenna 50ohm impedance
If unused, keep it
open.
ANT_MAIN 49 IO Main antenna 50ohm impedance
ANT_GNSS 47 AI GNSS antenna 50 ohm impedance
If unused, keep it
open.
GPIO Pins