Quectel EC21 Mini PCIe Series Hardware Design page 21

6 1.5V
7 CLKREQ#
8 UIM_PWR
9 GND
10 UIM_DATA
11 REFCLK-
12 UIM_CLK
13 REFCLK+
14 UIM_RESET
15 GND
16 UIM_VPP
17 RESERVED
18 GND
19 RESERVED
20 W_DISABLE#
21 GND
22 PERST#
23 PERn0
24 3.3Vaux
25 PERp0
26 GND
27 GND
28 1.5V
EC21_Mini_PCIe_Hardware_Design
NC
RESERVED
USIM_VDD PO
GND
USIM_DATA IO
UART_RX DI
USIM_CLK DO
UART_TX DO
USIM_RST DO
GND
RESERVED
RI DO
GND
RESERVED
W_DISABLE# DI
GND
PERST# DI
UART_CTS DI
RESERVED
UART_RTS DO
GND
GND
NC
LTE Standard Module Series
EC21 Mini PCIe Hardware Design
Not connected
Reserved
Power supply for the
(U)SIM card
Mini card ground
Data signal of (U)SIM card
UART receive data
Clock signal of (U)SIM card
UART transmit data
Reset signal of (U)SIM card
Mini card ground
Reserved
Ring indication
Mini card ground
Reserved
Airplane mode control
Mini card ground
Fundamental reset signal
UART clear to send
Reserved
UART request to send
Mini card ground
Mini card ground
Not connected
Connect to
DTE's TX
Connect to
DTE's RX
Pulled up by
default.
Active low.
Pulled up by
default.
Active low.
Connect to
DTE's RTS
Connect to
DTE's CTS
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