Sdio - ADLINK Technology SMARC MODULE LEC-EL Product Specification

LEC-EL Product specification
4.3.9

SDIO

Name Pin # Description
SDIO_D0 P39 SDIO Data lines. These signals operate in push-pull mode.
SDIO_D1 P40
SDIO_D2 P41
SDIO_D3 P42
SDIO_WP P33 SDIO Write Protect. This signal denotes the state
of the write-protect tab on SD cards.
SDIO_CMD P34 SDIO Command/Response. This signal is used for card
initialization and for command transfers. During
initialization mode this signal is open drain. During
command transfer this signal is in push-pull mode.
SDIO_CD# P35 SDIO Card Detect.
This signal indicates when a SDIO/MMC card is present.
SDIO_CK P36 SDIO Clock. With each cycle of this signal a one-bit
transfer on the command and each data line occurs.
SDIO_PWR_EN P37 SDIO Power Enable. This signal is used to
enable the power being supplied to a SD/MMC card
device.
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I/O I/O
Type Level
I/O 1.8V or
CMOS 3.3V
I OD 3.3V
CMOS
I/O 1.8V or
CMOS 3.3V
I OD 3.3V
CMOS
O 1.8V or
CMOS 3.3V
O 3.3V
CMOS
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Power PU / PD Comments
Domain
Runtime SDIO controller will detect SD Cards voltage level
(1.8V for UHS-I and 3.3V for standard) and adjust
its I/O voltage level accordingly
Runtime PU 10k Pulled up on module
Runtime SDIO controller will detect SD Cards voltage level
(1.8V for UHS-I and 3.3V for standard) and adjust
its I/O voltage level accordingly
Runtime PU 10k Pulled up on module
Runtime
Runtime should be driven low in STB Mode by the module
SGET SMARC Rev 2.1