Quectel LTE Standard Module Series Hardware Design page 18

30 SMB_CLK
31 PETn0
32 SMB_DATA
33 PETp0
34 GND
35 GND
36 USB_D-
37 GND
38 USB_D+
39 3.3Vaux
40 GND
41 3.3Vaux
42 LED_WWAN#
43 GND
44 LED_WLAN#
45 RESERVED
46 LED_WPAN#
47 RESERVED
48 1.5V
49 RESERVED
EG21-G_Mini_PCIe_Hardware_Design
I2C_SCL
DTR
I2C_SDA
RESERVED
GND
GND
USB_DM
GND
USB_DP
VCC_3V3
GND
VCC_3V3
LED_WWAN#
GND
USIM_PRESENCE
PCM_CLK
RESERVED
PCM_DOUT
NC
PCM_DIN
LTE Standard Module Series
EG21-G Mini PCIe Hardware Design
DO I2C serial clock
DI Sleep mode control
IO I2C serial data
Reserved
Mini card ground
Mini card ground
USB differential data
IO
(-)
Mini card ground
USB differential data
IO
(+)
3.0V~3.6V, typically
PI
3.3V DC supply
Mini card ground
3.0V~3.6V, typically
PI
3.3V DC supply
LED signal for
OC indicating the network
status of the module
Mini card ground
(U)SIM card insertion
DI
detection
IO PCM clock signal
Reserved
DO PCM data output
Not connected
DI PCM data input
Require
external pull-up
to 1.8V.
Require
external pull-up
to 1.8V.
Require
differential
impedance of
90Ω.
Require
differential
impedance of
90Ω.
Active low
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