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FIBOCOM NL668-AM Hardware User Manual
Page 21 of 62
Pin
Pin Name
I/O Level
Description
V
IH
max=2.0V
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
I/O
Conform to USB2.0
standard specification
USB differential data bus (+)
70
USB_DM
I/O
Conform to USB2.0
standard specification
USB differential data bus (-)
71
USB_VBUS
I
Vmax=5.25V
Vmin=3.0V
Vnorm=5.0V
USB plug detection
72
GND
G
-
Ground
73-112
GND
G
-
Ground
113
NC
-
-
NC
114
NC
-
-
NC
115
USB_BOOT
I
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
Emergency download
high level active
recommended to reserve test point
116
NC
-
-
NC
117
NC
-
-
NC
118
WLAN&SDIO
I/O
Reserved
119
EPHY_RST_N
O
Reserved
120
EPHY_INT_N
I
Reserved
121
SGMII_MDATA
I/O
Reserved
122
SGMII_MCLK
O
Reserved
123
SGMII_TX_M
O
Reserved
124
SGMII_TX_P
O
Reserved
125
SGMII_RX_P
I
Reserved
126
SGMII_RX_M
I
Reserved
127
PM_ENABLE
I
Reserved
128
VREG_L5_UIM2
PO
Reserved
129
SDC1_DATA_3
I/O
Reserved
