LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 17 / 67
2.4. Functional Diagram
The following figure shows the block diagram of EC21 Mini PCIe.
EC21
Module
PCM&I2C
M
in
i P
C
I E
x
p
re
s
s
In
te
rf
a
c
e
USB
W_DISABLE#
PERST#
LED_WWAN#
Main
Antenna
Connector
VCC
Main
Antenna
VBAT
GNSS
Antenna
Connector
GNSS
Antenna
Boost
Circuit
Diversity
Antenna
Connector
Diversity
Antenna
WAKE#
UART
DTR
RI
(U)SIM
Figure 1: Functional Diagram