Product Info

LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 21 / 64
3.2. Pin Description
The following tables show the pin definition and description of EC21 Mini PCIe on the 52-pin application.
Table 3: I/O Parameters Definition
Table 4: Pin Description
Type Description
DI Digital Input
DO Digital Output
IO Bidirectional
OC Open Collector
PI Power Input
PO Power Output
Pin No.
Mini PCI Express
Standard Name
EC21 Mini PCIe
Pin Name
I/O Description Comment
1 WAKE# WAKE# OC
Output signal used to wake
up the host
2 3.3Vaux VCC_3V3 PI 3.3V DC supply
3 COEX1 RESERVED Reserved
It is
prohibited to
be pulled up
to high level
before
startup.
4 GND GND Mini card ground
5 COEX2 RESERVED Reserved
It is
prohibited to
be pulled up
to high level
before
startup.
6 1.5V NC Not connected