Users Manual

LTE Standard Module Series
EC200T Series Mini PCIe Hardware Design
EC200T_Series_Mini_PCIe_Hardware_Design 24 / 54
LDO_IN
C1
C2
MIC29302WU U1
IN OUT
EN
GND
ADJ
24
1 3 5
VCC_3V3
100 nF
C3
C4
100 nF
R2
82K 1%
47K 1%
R3
470R
51K
R4
R1
MCU_POWER
_ON/OFF
47K
4.7K
R5
R6
C5
C6
33 pF
10 pF
TVS
D1
470 μF
470 μF
Figure 3: Reference Circuit of Power Supply
3.6. (U)SIM Interface
EC200T Series Mini PCIe’s (U)SIM interface circuitry meets ETSI and IMT-2000 requirements. Both 1.8
V and 3.0 V (U)SIM cards are supported. The following table shows the pin definition of (U)SIM interface.
Table 7: Pin Definition of (U)SIM Interface
EC200T Series Mini PCIe supports (U)SIM card hot-plug via the USIM_DET pin. The function supports
low level and high level detections. By default, It is disabled, and can be configured via AT+QSIMDET
command. Please refer to document [2] for details about the command.
The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector.
Pin Name Pin No. I/O Power Domain Description
USIM_VDD 8 PO 1.8 V/3.0 V (U)SIM card power supply
USIM_DATA 10 IO 1.8 V/3.0 V (U)SIM card data
USIM_CLK 12 DO 1.8 V/3.0 V (U)SIM card clock
USIM_RST 14 DO 1.8 V/3.0 V (U)SIM card reset
USIM_DET 44 DI 1.8 V (U)SIM card hot-plug detect