Quectel EC200U Series User Manual

LTE Standard Module Series
EC200U_Series_Hardware_Design 39 / 94
USIM_DET
13
DI
(U)SIM card hot-plug detect
1.8 V power domain.
If unused, keep it open.
USIM_GND
10
(U)SIM card GND
Table 13: Pin Definition of (U)SIM2 Interface
Pin Name
Pin
No.
I/O
Description
Comment
USIM2_VDD
128
PO
(U)SIM2 card power supply
The (U)SIM2 function is optional. If
the firmware version of the module
supports the function of the
(U)SIM2 card, the relevant
functions of the (U)SIM2 card can
be realized by multiplexing
AP_READY, WAKEUP_IN,
SLEEP_IND, and W_DISABLE#
pins. For details, please consult
Quectel Technical Supports.
AP_READY
2
DIO
(U)SIM2 card data
WAKEUP_IN
1
DO
(U)SIM2 card clock
W_DISABLE#
4
DO
(U)SIM2 card reset
SLEEP_IND
3
DI
(U)SIM2 card hot-plug detect
The module supports (U)SIM card hot-plug via the USIM_DET, and both high and low level detections are
supported. By default, the function is disabled, and it can be enabled by AT+QSIMDET. Please see
document [2] for more details about the AT+QSIMDET.
The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector.
Module
USIM_VDD
USIM_GND
USIM_RST
USIM_CLK
USIM_DATA
USIM_DET
0R
0R
0R
VDD_EXT
51K
100 nF
GND
GND
33 pF
33 pF 33 pF
VCC
RST
CLK
IO
VPP
GND
GND
USIM_VDD
10 K
(U)SIM Card Connector
Switch
Figure 17: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector
If (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.

Quectel EC200U Series Specifications

General

Brand	Quectel
Model	EC200U Series
Category	Control Unit
Language	English