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FIBOCOM FG621-LA Series Hardware Guide
Page 15 of 57
Pin#
Pin Name
I/O
Level
Description
V
OH
min=1.35V
For3.0V (U)SIM:
V
IL
max=1.0V
V
IH
min=1.95V
V
OL
max=0.45V
V
OH
min=2.55V
32
USB_VBUS
PI
Vmax=5.25V
Vmin=3.0V
Vnorm=5.0V
USB plug detection
33
USB_DM
DIO
Conform to USB2.0
standard
specification
USB differential data
signal (-)
34
USB_DP
DIO
Conform to USB2.0
standard
specification
USB differential data
signal (+)
36
USB_ID*
DI
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
OTG identification
signal, Reserved
42
I2C_SDA
OD
1.8V domain
I
2
C interface data signal,
pulled up inside the
module
43
I2C_SCL
OD
1.8V domain
I
2
C interface clock
signal, pulled up inside
the module
46
SD_VDD
PO
For 1.8V SD:
Vmax=1.9V
Vmin=1.75V
For 3.0V SD:
Vmax=3.15V
Vmin=2.75V
IOmax=400mA
SD card power supply
47
SD_DATA2
DIO
For1.8V SD:
V
OL
max=0.45V
V
OH
min=1.4V
V
IL
min=-0.3V
V
IL
max=0.58V
V
IH
min=1.3V
V
IH
max=2.0V
For 3.0V SD:
V
OL
max=0.35V
V
OH
min=2.15V
V
IL
min=-0.3V
V
IL
max=0.7V
V
IH
min=1.8V
V
IH
max=3.15V
SD card data signal
48
SD_DATA3
DIO
SD card data signal
49
SD_DATA0
DIO
SD card data signal
50
SD_DATA1
DIO
SD card data signal
51
SD_CMD
DO
SD card command
signal
53
SD_CLK
DO
SD card clock signal
