User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 58 of 88
10.2. I2C - Inter-integrated circuit
The LE920 I2C is an alternate function of our GPIO 1-10 pins.
Any GPIO can be configured as SCL and SDA
Available only from Modem side as SW emulation of I2C on GPIO lines.
LE920 supports I2C Master Mode only.
NOTE:
I2C is supported only on from Modem side as SW emulation of I2C on GPIO lines.
Refer to LE920 AT SW manual for command settings
10.3. SDIO – Secure Digital I/O
The LE920 is used to support standard SD/MMC memory cards with the following:
 Interface with SD/MMC memory cards up to 2 TB
 Max clock: 50 MHz SDR at 1.8 V, Max Data: 25MB/s, MMC standard: MMC 4.4
type 3 SDR at 1.8 V; SD standard: UHS-SDR25 at 1.8 V
 Max clock: 50 MHz SDR at 2.95 V, Max Data: 25MB/s, MMC standard: MMC
4.4 type 3 SDR at 2.95 V; SD standard: DS, HS at 2.95
PAD
Signal
I/O
Function
Type
COMMENT
AH17
SD/MMC_CMD
O
SD Command
1.8/2.95V
AD17
SD/MMC_CLK
O
SD Card Clock
1.8/2.95V
Y17
SD/MMC_DATA0
I/O
SD Serial Data 0
1.8/2.95V
AF17
SD/MMC_DATA1
I/O
SD Serial Data 1
1.8/2.95V
AB17
SD/MMC_DATA2
I/O
SD Serial Data 2
1.8/2.95V
W17
SD/MMC_DATA3
I/O
SD Serial Data 3
1.8/2.95V
U17
SD/MMC_CD
I
SD card detect input
1.8V
Active Low