Quectel EC20 User Manual

LTE Module Series
EC20 Mini PCIe Hardware Design
EC20_Mini_PCIe_Hardware_Design Confidential / Released 16 / 36
1. The typical supply voltage is 3.3V.
2. Keep all NC, reserved and unused pins unconnected.
3. Pay attention to the height of Mini PCI Express connector located on DTE, and USIM pins 8, 10, 12
and 14 cannot be used at the same time when using the optional USIM holder.
4. “*” means digital audio (PCM) function is only supported on Telematics version.
3.2.2. Pin Assignment
The following figure shows the pin assignment of EC20 Mini PCIe module. The top side contains EC20
module and antenna connectors.
PIN2
PIN52
BOT
PIN1
PIN51
TOP
Figure 2: Pin Assignment
50
GND
GND
Mini Card ground
51
RESERVED
PCM_SYNC*
IO
PCM frame sync
52
3.3Vaux
VCC_3V3
PI
3.3V DC supply
NOTES
Quectel
Confidential

Quectel EC20 Specifications

General

Brand	Quectel
Model	EC20
Category	PCI Card
Language	English