User's Manual

M10 Hardware Design
M10_HD_V3.0 - 63 -
3.18. SD card interface
The module provides SD card interface that supports many types of memory, such as Memory
Stick, SD/MCC card and T-Flash or Micro SD card. The following are the main features of SD
card interface.
 Only supports 1bit serial mode
 Dose not support the SPI mode SD/MMC memory card
 Dose not support multiple SD memory cards
 Dose not support hot plug
 The data rate up to 26MHz in serial mode
 Up to 32GB maximum memory card capacity
With the SD card interface features and reference circuit shown in figure 45, the users can easily
design the SD card application circuit to enhance the memory capacity of the module. The users
can store some high-capacity files to external memory card. Such as in the automotive application
system, the module can record and store the audio file to the SD card, and also can play the audio
files in SD card.
Table 25: Pin definition of the SD card interface
Figure 45
: Reference circuit of SD card
Name Pin Function
SD_DATA 1 Data output and input signal of SD card
SD_CLK 2 Clock signal of SD card output
SD_CMD 3 Command signal of SD card output