LTE-A Module Series
EP06 Series Hardware Design
EP06_Series_Hardware_Design 19 / 56
The typical supply voltage of the module is 3.3 V. The power supply must be able to provide at least 2 A
current, and a bypass capacitor of no less than 470 µF with low ESR should be used to prevent the
voltage from dropping.
The following figure shows a reference design of power supply. The tolerance of resistors R2 and R3 is
recommended to be 1 %, and the capacitor C3 needs a low ESR.
LDO_IN
C1
C2
MIC29302WU
U1
IN
OUT
E
N
G
N
D
A
D
J
2
4
1
3
5
VCC
100nF
C3
470uF
C4
100nF
R2
82K 1%
47K 1%
R3
470uF
470R
51K
R4
R1
MCU_POWER
_ON/OFF
47K
4.7K
R5
R6
C5
C6
33pF
10pF
TVS
D1
Figure 3: Reference Design of Power Supply
3.4. (U)SIM Interfaces
The (U)SIM interface circuitry meets ETSI and IMT-2000 requirements. Both 1.8 V and 3.0 V (U)SIM
cards are supported, and Dual SIM Single Standby function is supported.
The following table shows the pin definition of (U)SIM interfaces.
Table 6: Pin Definition of (U)SIM Interfaces
4, 9, 15, 18, 21, 26, 27, 29,
34, 35, 37, 40, 43, 50
GND
Ground
Pin No.
Pin Name
I/O
Power Domain
Description
8
USIM1_VDD
PO
1.8/ 3.0 V
Power source for (U)SIM1 card
10
USIM1_DATA
IO
1.8/ 3.0 V
Data signal of (U)SIM1 card
12
USIM1_CLK
DO
1.8/ 3.0 V
Clock signal of (U)SIM1 card
