Quectel EM06 Series User Manual

LTE-A Module Series
EM06 Series Hardware Design
EM06_Series_Hardware_Design 31 / 69
Normally Open (U)SIM Card Connector:
⚫ When the (U)SIM card is absent, the switch is open and USIM_DET is at low level.
⚫ When the (U)SIM card is inserted, the switch is closed and USIM_DET is at high level.
If the (U)SIM card detection function is not needed, please keep USIM_DET unconnected. A reference
circuit for (U)SIM interface with a 6-pin (U)SIM card connector is illustrated in the following figure.
Module
USIM_VDD
USIM_GND
USIM_RST
USIM_CLK
USIM_DATA
22R
22R
22R
100 nF
(U)SIM Card Connector
GND
33 pF 33 pF 33 pF
VCC
RST
CLK IO
VPP
GND
GND
15K
USIM_VDD
Figure 15: Reference Design of (U)SIM Interface with a 6-Pin (U)SIM Card Connector
The timing of (U)SIM is illustrated by the following figure.
USIM_VDD
 21.7 ms
USIM_DATA
USIM_CLK
USIM_RST
USIM_CLK
ATR
tb  ta + 52 us
ta  1.5 ms
0.1 ms  tc  10 ms
Notes:
1. ta is the time interval between USIM_VDD HIGH level and USIM_CLK HIGH level.
2. tb is the time interval between USIM_VDD HIGH level and USIM_DATA HIGH level.
3. tc is the time interval between USIM_RST HIGH level and answer on USIM_DATA.
Figure 16: Timing of (U)SIM

Quectel EM06 Series Specifications

General

Brand	Quectel
Model	EM06 Series
Category	Control Unit
Language	English