Product Info

LTE Standard Module Series
EC21_Series_Mini_PCIe_Hardware_Design
24
/ 75
4
The digital audio (PCM) function is only supported on Data + Voice version.
to 1.8 V.
31 PETn0 DTR DI Sleep mode control
32 SMB_DATA I2C_SDA DIO
I2C serial data
(for external codec)
Require
external pull-up
to 1.8 V.
33 PETp0 RESERVED Reserved
34 GND GND Mini card ground
35 GND GND Mini card ground
36 USB_D- USB_DM AIO USB differential data (-)
Require
differential
impedance of
90 Ω.
37 GND GND Mini card ground
38 USB_D+ USB_DP AIO USB differential data (+)
Require
differential
impedance of
90 Ω.
39 3.3Vaux VCC_3V3 PI
3.0–3.6 V, typically 3.3 V
DC supply
40 GND GND Mini card ground
41 3.3Vaux VCC_3V3 PI
3.0–3.6 V, typically 3.3 V
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 detect
45 RESERVED PCM_CLK
4
DIO PCM clock
46 LED_WPAN# RESERVED Reserved
47 RESERVED PCM_DOUT
4
DO PCM data output
48 1.5V NC Not connected