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FIBOCOM NL668-LA Series Hardware Guide
Page 18 of 61
Pin No.
Pin Name
I/O Level
Description
61
STATUS
O
V
OH
min=1.35V
V
OL
max=0.45V
Module network state indicate
62
RI
O
V
OL
max=0.45V
V
OH
min=1.35V
Module output ring indicator
63
DCD
O
V
OL
max=0.45V
V
OH
min=1.35V
Module output data carrier detection
64
CTS
O
V
OL
max=0.45V
V
OH
min=1.35V
Request to send
65
RTS
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Clear to send
66
DTR
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Data ready. The control of the sleep mode
67
TXD
O
V
OL
max=0.45V
V
OH
min=1.35V
Transmit data
68
RXD
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Receive data
69
USB_DP
IO
Conform to
USB2.0 standard
specification
USB differential data bus (+)
70
USB_DM
IO
Conform to
USB2.0 standard
specification
USB differential data bus (-)
71
USB_VBUS
PI
Vmax=5.25V
Vmin=3.8V
Vnorm=5.0V
USB plug detection
72,76
GND
G
-
Ground
73~75,77
~84
RESERVED
-
-
Reserved
85~112
GND
G
-
GND
113
NC
-
-
NC
114
NC
-
-
NC
