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Table 13: Pin Definition of the SD Card Interface
Pin Name
Pin No.
SD_CMD
34
SD_CLK
35
SD_DATA0
36
Module
SD_DATA0
Table 14: Pin Definition of the SD Card Interface
Pin No.
Pin Name of SD Card
1
CD/DATA3
2
CMD
3
VSS1
4
VDD
5
CLK
6
VSS2
7
DATA0
M85_Hardware_Design
Description
Command signal of SD card output
Clock signal of SD card output
Data output and input signal of SD card
VDD_EXT
33R
SD_CMD
33R
SD_CLK
33R
Figure 35: Reference Circuit for SD Card
Confidential / Released
47K 47K
47K
4.7uF
0.1nF
Pin Name of T-Flash (Micro SD) Card
DATA2
CD/DATA3
CMD
VDD
CLK
VSS
DATA0
GSM/GPRS Module Series
M85 Hardware Design
SD Socket
9
DATA2
1
CD/DATA3
2
CMD
3
VSS1
4
VDD
5
CLK
6
VSS2
7
DATA0
8
DATA1
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