LTE Standard Module Series
EC20 R2.1 Mini PCIe Hardware Design
EC20_R2.1_Mini_PCIe_Hardware_Design 15 / 51
3.2. Pin Description
The following tables show the pin definition and description of the 52 pins on EC20 R2.1 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
EC20 R2.1 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
RESERVED
COEX_UART_RX
1)
DI
LTE/WLAN&BT
coexistence signal
It is prohibited
to be pulled up
to high level
before startup.
4
GND
GND
Mini card ground
5
RESERVED
COEX_UART_TX
1)
DO
LTE/WLAN&BT
coexistence signal
It is prohibited
to be pulled up
to high level
before startup.
6
1.5V
NC
Not connected
7
CLKREQ#
RESERVED
Reserved
8
UIM_PWR
USIM_VDD
PO
Power supply for the
