LTE Standard Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design 19 / 79
3.2. Pin Description
The following tables show the pin definition and description of the 52 pins on EC25 Mini PCIe.
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
EC25 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
3.0V~3.6V, typically
3.3V DC supply
3
COEX1
COEX_UART_RX
DI
LTE/WLAN&BT
coexistence receive
signal
It is prohibited
to be pulled up
high before
startup.
4
GND
GND
Mini card ground
5
COEX2
COEX_UART_TX
DO
LTE/WLAN&BT
coexistence transmitting
signal
It is prohibited
to be pulled up
high before
startup.
6
1.5V
NC
Not connected
7
CLKREQ#
RESERVED
Reserved
8
UIM_PWR
USIM_VDD
PO
Power supply for the