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Smart Machine Smart Decision
SIM5360_Hardware Design_V1.06
2016-11-17
34
Table 14: Electronic characteristic
Symbol
Parameter
Min
Typ
Max
Unit
VDD_EXT
LDO power output
2.71
2.85
2.99
V
V
IH
High-level input voltage
0.65·VDD_EXT
-
0.3
V
V
IL
Low-level input voltage
-0.3
0
0.3·VDD_EXT
V
V
OH
High-level output voltage
2.71
2.85
2.99
V
V
OL
Low-level output voltage
0
0
0.45
V
3.6.2
Design guide
The module provides a LDO named VDD_EXT for SD card power supply. The LDO is 2.85V by default,
capable of 300mA. Data lines should be pulled up to VDD_EXT by 10K resistors. ESD/EMI components
should be arranged beside SD card socket. Refer to the following application circuit.
Module
SD Card
VCC
GND
CMD
D3
10K
VDD_EXT
SD_CMD
SD_DATA3
SD_DATA1
SD_DATA2
TVS
33pF
SD_DATA0
SD_CLK
10K
10K
10K
10K
10K
TVS
33pF
TVS
33pF
TVS
33pF
TVS
33pF
TVS
33pF
100nF
4.7uF
D2
D1
D0
CLK
GND
VDD_EXT
Figure 22: SD interface circuit
3.7
USIM Interface
The USIM provides the required subscription verification information to allow the mobile equipment to
attach to a GSM or UMTS network. Both 1.8V and 3.0V SIM Cards are supported.
SD_DATA2
24
SD card data2
SD_DATA3
25
SD card data3
SD_CLK
26
SD card clock
SD_CMD
21
SD card command
VDD_EXT
44
SD card power
SIMCOM
CONFIDENTIAL
FILE