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FIBOCOM NL668-AM Hardware User Manual
Page 17 of 62
3.1.2 Pin definition
The pin definitions are shown in the following table:
Pin
Pin Name
I/O Level
Description
1
WAKEUP_IN
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
External device wake-up module
2
AP_READY
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Reserved
3
RESERVED
-
Reserved
4
W_DISABLE#
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Module flight mode control
5
NET_MODE
O
V
OH
min=1.35V
V
OL
max=0.45V
Module state indicate
6
NET_STATUS
O
V
OH
min=1.35V
V
OL
max=0.45V
Reserved
7
VDD_EXT
PO 1.8V
Module digital level, 1.8V output, 80mA
8
GND
G
-
Ground
9
GND
G
-
Ground
10
GND
G
-
Ground
11
DBG_RXD
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
DEBUG serial port Receive data
12
DBG_TXD
O
V
OL
max=0.45V
V
OH
min=1.35V
DEBUG serial port Transmit data
13
USIM_PRESENCE
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
USIM card hot plug detection
14
USIM _VDD
O
For 1.8V USIM:
Vmax=1.9V
Vmin=1.7V
USIM power
