Quectel EC25 Mini PCIe - Page 22

LTE Standard Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design 21 / 79
30
SMB_CLK
I2C_SCL
DO
I2C serial clock
Require
external pull-up
to 1.8V.
31
PETn0
DTR
DI
Sleep mode control
32
SMB_DATA
I2C_SDA
IO
I2C serial data
Require
external pull-up
to 1.8V.
33
PETp0
RESERVED
Reserved
34
GND
GND
Mini card ground
35
GND
GND
Mini card ground
36
USB_D-
USB_DM
IO
USB differential data (-)
Require
differential
impedance of
90Ω.
37
GND
GND
Mini card ground
38
USB_D+
USB_DP
IO
USB differential data (+)
Require
differential
impedance of
90Ω.
39
3.3Vaux
VCC_3V3
PI
3.0V~3.6V, typically
3.3V DC supply
40
GND
GND
Mini card ground
41
3.3Vaux
VCC_3V3
PI
3.0V~3.6V, typically
3.3V DC supply
42
LED_WWAN#
LED_WWAN#
OC
LED signal for indicating
the network status of
the module
Active low
43
GND
GND
Mini card ground
44
LED_WLAN#
USIM_PRESENCE
DI
(U)SIM card insertion
detection
45
RESERVED
PCM_CLK
1)
IO
PCM clock signal
46
LED_WPAN#
RESERVED
Reserved
47
RESERVED
PCM_DOUT
1)
DO
PCM data output
48
1.5V
NC
Not connected
49
RESERVED
PCM_DIN
1)
DI
PCM data input