U)Sim Card Connector Without Hot-Plug - Quectel RM510Q-GL Hardware Design

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 inserted, CD1 is pulled down to ground and USIM1_DET is at low level.
The following figure shows a reference design of (U)SIM interface with a normally open (NO) (U)SIM card
connector.
Module
USIM1_VDD
USIM1_RST
USIM1_CLK
USIM1_DET
USIM1_DATA
GND
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 detection function 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
USIM1_VDD
USIM1_RST
USIM1_CLK
USIM1_DET
USIM1_DATA
GND
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
RM510Q-GL_Hardware_Design
USIM1_VDD
10k-20k
22 Ω
22 Ω
22 Ω
33 pF 33 pF
USIM1_VDD
10k-20k
22 Ω
22 Ω
22 Ω
33 pF 33 pF
RM510Q-GL Hardware Design
100 nF
33 pF
TVS
100 nF
TVS
33 pF
5G Module Series
(U)SIM Card
Connector
VCC VPP
RST
CLK
CD2
CD1
IO
GND
(U)SIM Card
Connector
VCC
RST
CLK
IO
GND
0R
VPP
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