U)Sim Interfaces - Quectel RG520N-AT Hardware Design

Table 14: Pin Definition of USB_BOOT Interface
Pin Name
USB_BOOT

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
USIM1_VDD
USIM1_DATA
USIM1_CLK
USIM1_RST
RG520N-AT_Hardware_Design
Pin No. I/O
81 DI
TVS
Figure 19: Reference Circuit of USB_BOOT Interface
Pin No. I/O
245 PO
248 DIO
247 DO
244 DO
Description
Forces the module into emergency download
mode
Test point
10K
TVS
Close to test point
Description
(U)SIM1 card power
supply
(U)SIM1 card data
(U)SIM1 card clock
(U)SIM1 card reset
5G Module Series
Comment
Either 1.8 V or 2.95 V is
supported and can be
identified automatically by
the module.
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