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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

Telit Wireless Solutions LE910C1-AP Hardware Design Guide

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