Quectel 5G Module Series Hardware Design

5G Module Series
RM500Q-AE&RM502Q-AE Hardware Design
RM500Q-AE&RM502Q-AE_Hardware_Design 39 / 86
USIM1_DET will change from high to low level; when the (U)SIM card is removed, USIM1_DET will
change from low to high level.
⚫ When the (U)SIM is absent, CD1 is open from CD2 and USIM1_DET is at high level.
⚫ When the (U)SIM is present, CD1 is pull down to ground and USIM1_DET is at low level.
The following figure shows a reference design for (U)SIM interface with a normally open (NO) (U)SIM
card connector.
Module (U)SIM Card
Connector
USIM1_DET
USIM1_DATA
USIM1_CLK
RST
CLK
CD1
IO
USIM1_VDD
USIM1_VDD
USIM1_RST
VCC
GND
VPP
GND
TVS
10-20k
22 Ω
22 Ω
22 Ω
33 pF 33 pF 33 pF
100 nF
4.7k
CD2
NOTE: All these resistors, capacitors and TVS should be close to (U)SIM card connector in PCB layout.
Figure 16: Reference Circuit for Normally Open (U)SIM Card Connector
4.1.5. (U)SIM Card Connector Without Hot-plug
If (U)SIM card hot-plug is not needed, please keep USIM1_DET unconnected. A reference circuit for
(U)SIM card interface with a 6-pin (U)SIM card connector is illustrated by the following figure.
Module (U)SIM Card
Connector
USIM1_DET
USIM1_DATA
USIM1_CLK
RST
CLK
IO
USIM1_VDD
USIM1_VDD
USIM1_RST
VCC
GND
VPP
GND
TVS
22 Ω
22 Ω
22 Ω
10k-20k
100 nF
33 pF 33 pF 33 pF
NOTE: All these resistors, capacitors and TVS should be close to (U)SIM card connector in PCB layout.
Figure 17: Reference Circuit for a 6-Pin (U)SIM Card Connector

Quectel 5G Module Series Specifications

General

Brand	Quectel
Model	5G Module Series
Category	Motherboard
Language	English