Quectel RG520N-AT - Page 23

5G Module Series
RG520N-AT_Hardware_Design 22 / 109
USIM1_DATA
248
DIO
(U)SIM1 card data
USIM1_VDD
1.8/2.95 V
USIM1_CLK
247
DO
(U)SIM1 card
clock
USIM1_RST
244
DO
(U)SIM1 card
reset
USIM1_DET
249
DI
(U)SIM1 card
hot-plug detect
1.8 V
If unused, keep it
open.
USIM2_VDD
250
PO
(U)SIM2 card
power supply
1.8/2.95 V
USIM2_DATA
251
DIO
(U)SIM2 card data
USIM2_VDD
1.8/2.95 V
USIM2_CLK
253
DO
(U)SIM2 card
clock
USIM2_RST
254
DO
(U)SIM2 card
reset
USIM2_DET
252
DI
(U)SIM2 card
hot-plug detect
1.8 V
If unused, keep it
open.
Main UART
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
MAIN_TXD
68
DO
Main UART
transmit
1.8 V
MAIN_RXD
70
DI
Main UART
receive
MAIN_RI
100
DO
Main UART ring
indication
MAIN_DTR
258
DI
Main UART data
terminal ready
MAIN_DCD*
261
DO
Main UART data
carrier detect
Bluetooth UART*
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
BT_TXD
59
DO
Bluetooth UART
transmit
1.8 V
BT_RXD
63
DI
Bluetooth UART
receive
BT_RTS
61
DI
Request to send
signal to the
module
Connect to the
peripheral’s RTS.