Product Info

LTE Standard Module Series
EC25 Series Hardware Design
EC25_Series_Hardware_Design 37 / 134
COEX_UART
_TX
138
DO
LTE/WLAN & BT
coexistence signal
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
Cannot be pulled up
before startup.
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 = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
BT_TXD
38
DO
BT UART transmit
data
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
If unused, keep it
open.
BT_RXD
39
DI
BT UART receive
data
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
BT_CTS
40
DO
BT UART clear to
send
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
Cannot be pulled up
before startup.
If unused, keep it
open.
BT_EN
139
DO
BT function control
via FC20 module
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
If unused, keep it
open.
RF Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ANT_DIV
35
AI
Diversity antenna
50 Ω impedance.
If unused, keep it
open.
ANT_MAIN
49
IO
Main antenna
50 Ω impedance.
ANT_GNSS
47
AI
GNSS antenna
50 Ω impedance.
If unused, keep it
open.
Other Interface Pins
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
WAKEUP_IN
1
DI
Sleep mode control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
1.8 V power domain.
Cannot be pulled up