U)Sim Card Interfaces - Quectel EP06 Manual

The following figure shows a reference design of power supply. The precision of resistor R2 and R3 is 1%,
and the capacitor C3 needs a low ESR.
LDO_IN
D1
C1
TVS
470uF
R5
4.7K
MCU_POWER
R6
_ON/OFF
47K

3.4. (U)SIM Card Interfaces

The following table shows the pin definition of (U)SIM card interfaces.
Table 6: (U)SIM Pin Definition
Pin No. Pin Name
USIM_VDD
8,13
USIM2_VDD
USIM_DATA
10,19
USIM2_DATA
USIM_CLK
12,17
USIM2_CLK
USIM_RST
14,7
USIM2_RST
EP06 supports 1.8V and 3.0V (U)SIM cards. The following figure shows a reference design for a 6-pin
(U)SIM card connector.
MIC29302WU
2
IN OUT
R1
C2
51K
100nF
Figure 3: Reference Design of Power Supply
I/O Power Domain
PO 1.8V/3.0V
IO 1.8V/3.0V
DO 1.8V/3.0V
DO 1.8V/3.0V
U1
4
R2
82K 1%
R4
C3
470R 470uF
R3
47K 1%
Description
Power source for the (USIM) card
(U)SIM data signal
(U)SIM clock signal
(U)SIM reset signal
VCC
C4 C5 C6
33pF 10pF
100nF
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