Avnet SMARC MSC SM2S-IMX8MINI User Manual

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User Manual
4.10 SDIO
The SDIO interface on the SMARC™ connector supports:
• 1-bit / 4-bit for SD/SDIO mode (standard up to version 3.0)
• 1-bit / 4-bit for MMC mode (standard up to version 5.0)
• SD/SDIO 1.8 V or 3.3 V operation with auto detection
• Default Speed, High-Speed and UHS-I (SDR50, DDR50 and SDR104)
Table 15: SDIO Signal Description
Signal
Pin
Type
Signal Level
Pin on
i.MX8M Mini
Pin name on
i.MX8M Mini
Power
Tolerance
PU/PD
Description
SDIO_D0
I/O
3.3V / 1V8 CMOS
AB23
SD2_DATA0
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Data
SDIO_D1
I/O
3.3V / 1V8 CMOS
AB24
SD2_DATA1
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Data
SDIO_D2
I/O
3.3V / 1V8 CMOS
V24
SD2_DATA2
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Data
SDIO_D3
I/O
3.3V / 1V8 CMOS
V23
SD2_DATA3
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Data
SDIO_CMD
I/O
3.3V / 1V8 CMOS
W24
SD2_CMD
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Command
SDIO_CK
O
3.3V / 1V8 CMOS
W23
SD2_CLK
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Clock
SDIO_PWR_EN
O PP
3.3V CMOS
AB26
SD2_RESET_B
3.3V
PU 10k 3.3V
SDIO Controller Power enable
SDIO_CD#
I
3.3V / 1V8 CMOS
AA26
SD2_CD_B
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Card Detect
SDIO_WP
I
3.3V / 1V8 CMOS
AA27
SD2_WP
3.3V / 1.8V
PU 10k 3.3V / 1.8V
SDIO Controller Write Protect
Maximum bus speed for SDIO interface is set per default to High Speed Mode (HS) with a maximum frequency of 50MHz and 3.3V signal voltage.
To achieve higher bus speed mode (SDR50 and SDR104) it is highly recommend to keep SD signal trace length less then 100mm. A load switch with quick output discharge
should be used for SD-Card power.
Please contact Avnet Integrated /MSC Technical Support if this feature is required.

Avnet SMARC MSC SM2S-IMX8MINI Specifications

General

Brand	Avnet
Model	SMARC MSC SM2S-IMX8MINI
Category	Control Unit
Language	English