Product Info

LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 23 / 64
29 GND GND Mini card ground
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 3.3V DC supply
40 GND GND Mini card ground
41 3.3Vaux VCC_3V3 PI 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