Product Info

LTE Standard Module Series
EC21_Series_Mini_PCIe_Hardware_Design
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3.2. Pin Description
The following tables show the pin definition and description of the 52 pins on EC21 series Mini PCIe.
Table 4: I/O Parameters Definition
Table 5: Pin Description
Type Description
AIO Analog Input/Output
DI Digital Input
DO Digital Output
DIO Digital Input/Output
OC Open Collector
PI Power Input
PO Power Output
Pin
No.
Mini PCI Express
Standard Name
EC21 Series Mini
PCIe Pin Name
I/O Description Comment
1 WAKE# WAKE# OC Wake up the host
2 3.3Vaux VCC_3V3 PI
3.0–3.6 V,
typ. 3.3 V 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
7 CLKREQ# RESERVED Reserved