Pin Description; Design Guide - SimCom SIM5215 Hardware Design

3.9.1

Pin Description

Table 22: Electronic characteristic
Pin name
SD_DATA0
SD_DATA1
SD_DATA2
SD_DATA3
SD_CLK
SD_CMD
VREG_AUX
Table 23: Pin description
Pin name Pin No.
36
SD_DATA0
37
SD_DATA1
38
SD_DATA2
39
SD_DATA3
34
SD_CLK
35
SD_CMD
40
VREG_AUX
3.9.2

Design guide

The module provides a LDO named VREG_AUX for SD card power supply. The LDO is 2.85V by default,
capable of 250mA. Data lines should be pulled up to VREG_AUX by 10K resistors. ESD/EMI
components should be arranged beside SD card socket. Refer to the following application circuit.
SIM5215&SIM5216_Hardware Design_V2.02
Min
2.7
2.7
2.7
2.7
2.7
2.7
2.7
Function
SD/MMC card data0
SD card data1
SD card data2
SD card data3
SD card clock
SD card command
SD card power
43
Smart Machine Smart Decision
2.85V mode
Typ
2.85
2.85
2.85
2.85
2.85
2.85
2.85
Max
3.0
3.0
3.0
3.0
3.0
3.0
3.0
2012-08-31