Fibocom L831-EAU-01 - Page 12

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L831-EAU-01 Hardware User Manual Page
12
of
39
Pin
Pin Name
I/O
Reset
Value
Pin Description
Type
22
I2S_RX
I
PD
I2S serial data input
（
Reserved
）
CMOS 1.8V
23
WAKE_WWAN#
O
PU
Wake up host signal（Reserved）
CMOS 1.8V
24
I2S_TX
O
PD
I2S serial data output（Reserved）
CMOS 1.8V
25
DPR
I
PU
Body SAR control signal（Reserved）
CMOS 1.8V
26
GNSS_DISABLE#
I
PU
GNSS Disable signal
（
Reserved
）
CMOS 1.8V
27
GND
GND
Power Supply
28
I2S_WA
O
PD
I2S clock for left and right channels
（Reserved）
CMOS 1.8V
29
SSIC_RXN
I/O
USB SSIC transmit data minus
（Reserved）
30
UIM_RESET
O
PP
USIM reset signal
1.8V/3V
31
SSIC_RXP
I/O
USB SSIC transmit data plus
（
Reserved
）
32
UIM_CLK
O
PP
USIM clock signal
1.8V/3V
33
GND
GND
Power Supply
34
UIM_DATA
I/O
PU
USIM data signal
1.8V/3V
35
SSIC_TXN
I/O
USB SSIC receive data minus
（Reserved）
36
UIM_PWR
O
USIM power supply
1.8V/3V
37
SSIC_TXP
I/O
USB SSIC receive data plus
（Reserved）
38
NC
Not Connect
39
GND
GND
Power Supply
40
I2C_SCL
O
PU
I2C serial clock signal
CMOS 1.8V
41
NC
Not Connect
42
I2C_SDA
I/O
PU
I2C serial data signal
CMOS 1.8V
43
NC
Not Connect
44
I2C_IRQ
I
PU
GNSS interrupt input signal
CMOS 1.8V