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L850-GL Hardware User Manual Page 17 of 54
Pin “Notch” represents the gap of the gold fingers.
3.1.2 Pin Definition
The pin definition is as follows:
Pin Pin Name
I/O Reset Value
Pin Description
Type
1
CONFIG_3
O
NC
NC, L850 M.2 module is configured as
the WWAN – PCIe, USB3.0 interface
type
2
+3.3V
PI
Power input
Power Supply
3
GND
GND
Power Supply
4
+3.3V
PI
Power input
Power Supply
5
GND
GND
Power Supply
6
FULL_CARD_
POWER_OFF#
I
PU
Power enable, Module power on input,
internal pull up
CMOS
3.3/1.8V
7
USB D+
I/O
USB Data Plus
0.3---3V
8
W_DISABLE1#
I
PD
WWAN Disable, active low
CMOS
3.3/1.8V
9
USB D-
I/O
USB Data Minus
0.3---3V
10
LED1#
O
T
System status LED, Output open drain,
CMOS 3.3V
CMOS 3.3V
11
GND
GND
Power Supply
12
Notch
Notch
13
Notch
Notch
14
Notch
Notch
15
Notch
Notch
16
Notch
Notch
17
Notch
Notch
18
Notch
Notch
19
Notch
Notch
20
I2S_CLK
O
PD
I2S Serial clock,
Reserved
CMOS 1.8V
21
CONFIG_0
GND
GND, L850 M.2 module is configured as
the WWAN – PCIe, USB3.0 interface
type