Quectel RG520N-AT - U)SIM Interfaces

5G Module Series
RG520N-AT_Hardware_Design 48 / 109
Table 14: Pin Definition of USB_BOOT Interface
Module
USB_BOOT
VDD_EXT
10K
Test point
TVS
Close to test point
TVS
Figure 19: Reference Circuit of USB_BOOT Interface
4.3. (U)SIM Interfaces
(U)SIM interfaces circuitry meets ETSI and IMT-2000 requirements. Both Class B (2.95 V) and Class C
(1.8 V) (U)SIM cards are supported, and Dual SIM Single Standby function is supported.
Table 15: Pin Definition of (U)SIM Interfaces
Pin Name
Pin No.
I/O
Description
USB_BOOT
81
DI
Forces the module into emergency download
mode
Pin Name
Pin No.
I/O
Description
Comment
USIM1_VDD
245
PO
(U)SIM1 card power
supply
Either 1.8 V or 2.95 V is
supported and can be
identified automatically by
the module.
USIM1_DATA
248
DIO
(U)SIM1 card data
USIM1_CLK
247
DO
(U)SIM1 card clock
USIM1_RST
244
DO
(U)SIM1 card reset