LE910Cx Hardware Design Guide
1VV0301298 Rev.40 Page 78 of 149 2023-03-16
Not Subject to NDA
Note: SW emulated I2C on GPIO lines is only supported from the
modem side. For more information, refer to Ref 1: LE910Cx AT
Command User Guide for command settings.
Note: To keep backward compatibility with previous LE910 products,
it is recommended to keep using the SW emulated I2C available on
GPIO’s 1-10.
8.5.3. SD/MMC Card Interface
The LE910Cx provides an SD port supporting the SD3.0 specification, which can be used
to support standard SD/MMC memory cards with the following features:
Interface with SD/MMC memory cards up to 32 GB
Max clock @ 2.95V - 50 MHz SDR
Max Data: 25 MB/s
SD standard: HS-SDR25 at 2.95V
Max clock @ 1.8V - 200 MHz SDR
Max Data: 100 MB/s
SD standard: UHS-SDR104 at 1.8 V
Max clock @ 1.8V - 50 MHz DDR
Max Data: 50 MB/s
SD standard: UHS-DDR50 at 1.8 V
Table 31 lists the LE910Cx SD card signals.
PAD Signal I/O Function Type Comments
J12 SD/MMC_CMD O SD command 1.8/2.95V
F12 SD/MMC_CLK O SD card clock 1.8/2.95V
E12 SD/MMC_DATA0 I/O SD Serial Data 0 1.8/2.95V
G12 SD/MMC_DATA1 I/O SD Serial Data 1 1.8/2.95V
K12 SD/MMC_DATA2 I/O SD Serial Data 2 1.8/2.95V
H12 SD/MMC_DATA3 I/O SD Serial Data 3 1.8/2.95V
G13
SD/MMC_CD I SD card detect
input
1.8V Active Low
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