LTE Module Series
EC20 Mini PCIe Hardware Design
EC20_Mini_PCIe_Hardware_Design Confidential / Released 14 / 36
Table 4: Description of Pin
PO
Power output
Pin No.
Mini PCI Express
Standard Name
EC20 Mini PCIe
Pin Name
I/O
Description
Comment
1
WAKE#
RESERVED
—
Reserved
2
3.3Vaux
VCC_3V3
PI
3.3V DC supply
3
COEX1
RESERVED
—
Reserved
4
GND
GND
Mini Card ground
5
COEX2
RESERVED
—
Reserved
6
1.5V
NC
—
—
7
CLKREQ#
RESERVED
—
Reserved
8
UIM_PWR
USIM_VDD
PO
Power source for the
USIM/SIM card
9
GND
GND
Mini Card ground
10
UIM_DATA
USIM_DATA
IO
USIM/SIM data signal
11
REFCLK-
UART_RX
DI
UART receive data
Connect to
DTE’s TX
12
UIM_CLK
USIM_CLK
DO
USIM/SIM clock signal
13
UART_TX
DO
UART transmit data
Connect to
DTE’s RX
14
UIM_RESET
USIM_RST
DO
USIM/SIM reset signal
15
GND
GND
Mini Card ground
16
UIM_VPP
RESERVED
—
Reserved
17
RESERVED
RI
DO
URC ring indication
18
GND
GND
Mini Card ground
19
RESERVED
RESERVED
—
Reserved
20
W_DISABLE#
W_DISABLE#
DI
Disable wireless
communications
Pull-up,
Active low
21
GND
GND
Mini Card ground
22
PERST#
PERST#
DI
Functional reset to the card
Active low
Quectel
Confidential
