Quectel EC25-AUX Hardware Design page 35

COEX_UART
137
_RX
COEX_UART
138
_TX
WLAN_SLP_
118
CLK
BT_RTS 37
BT_TXD 38
BT_RXD 39
BT_CTS 40
BT_EN 139
RF Interfaces
Pin Name Pin No.
ANT_DIV 35
ANT_MAIN 49
ANT_GNSS 47
EC25_Hardware_Design
LTE/WLAN&BT
DI
coexistence signal
LTE/WLAN&BT
DO
coexistence signal
DO WLAN sleep clock
BT UART request to
DI
send
BT UART transmit
DO
data
BT UART receive
DI
data
BT UART clear to
DO
send
BT function control
DO
via FC20 module
I/O Description
AI Diversity antenna
IO Main antenna
AI GNSS antenna
LTE Standard Module Series
EC25 Hardware Design
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
V max=0.45V
OL
V min=1.35V
OH
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
V max=0.45V
OL
V min=1.35V
OH
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
V max=0.45V
OL
V min=1.35V
OH
V max=0.45V
OL
V min=1.35V
OH
DC Characteristics
1.8V power domain.
Cannot be pulled up
before startup.
If unused, keep it
open.
1.8V power domain.
Cannot be pulled up
before startup.
If unused, keep it
open.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
Cannot be pulled up
before startup.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
Comment
50Ω impedance.
If unused, keep it
open.
50Ω impedance.
50Ω impedance.
If unused, keep it
open.
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