Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved
FIBOCOM FG621-LA Series Hardware Guide
Page 18 of 57
Pin#
Pin Name
I/O
Level
Description
Reserved
146
COEX_UART_R
X*
DI
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
LTE/WLAN shared serial
port sending signal line,
Reserved
147
NET_MODE
DO
V
OL
max=0.45V
V
OH
min=1.35V
Module network state
indicate
149
WLAN_EN*
DO
V
OL
max=0.45V
V
OH
min=1.35V
Wake up WLAN module,
Reserved
150
WAKEUP_IN
DI
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
ma
x=2.0V
External device wakeup
module, active low by
default, configurable by
software
151
W_DISABLE#
DI
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Module flight mode
control, pull up by
default, low level can
make the module enter
flight mode
152
I2S_MCLK
DO
V
OL
max=0.45V
V
OH
min=1.35V
I2S output clock signal
155,156
VBAT_BB
PI
Vmax=4.3V
Vmin=3.4V
Vnorm=3.8V
Baseband power input
(3.4V~4.3V)
159
GPIO_3
DIO
V
OL
max=0.45V
V
OH
min=1.35V
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
GPIO
160
WAKE_ON_WIR
ELESS*
DI
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
WLAN chip wakeup
signal for the module,
Reserved
161
GPIO_4
DIO
V
OL
max=0.45V
V
OH
min=1.35V
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
GPIO
162
VDD_2V8
PO
Vnorm=2.8V
I
O
max=200mA
2.8V voltage output
163
BT_TXD*
DO
V
OL
max=0.45V
V
OH
min=1.35V
Bluetooth serial port