Quectel EC20 R2.1, Hardware Design

Page: 18 / 52

LTE Standard Module Series
EC20 R2.1 Mini PCIe Hardware Design
EC20_R2.1_Mini_PCIe_Hardware_Design 17 / 51
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
90
Ω.
37 GND GND Mini card ground
38 USB_D+ USB_DP IO USB differential data (+)
Require
differential
impedance of
90
Ω.
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
43 GND GND
Mini card ground
44 LED_WLAN# USIM_PRESENCE DI
(U)SIM card insertion
detection
45 RESERVED PCM_CLK
2)
IO PCM clock
46 LED_WPAN# RESERVED Reserved
47 RESERVED PCM_DOUT
2)
DO PCM data output
48 1.5V NC Not connected
49 RESERVED PCM_DIN
2)
DI PCM data input
50 GND GND Mini card ground