
Embedian, Inc.
69
SMARC-FiMX6 Computer on Module User’s Manual v.1.2
2.1.17.1. SDIO Card (4 bit) Interface
The Carrier SDIO Card can be selected as the Boot Device (See section
4.3).
Edge Golden
Finder
Signal Name
Direction
Type
Tolerance
Description
SDIO_D[0:3]
Bi-Dir
CMOS 3.3V
4 bit data path
SDIO_CMD
Bi-Dir
CMOS 3.3V
Command Line
SDIO_CK
Output
CMOS 3.3V
Clock
SDIO_WP
Input
CMOS 3.3V
Write Protect
SDIO_CD#
Input
CMOS 3.3V
Card Detect
SDIO_PWR_EN
Output
CMOS 3.3V
SD Card Power Enable
Note:
SD Cards are not typically available with a 1.8V I/O voltage. The Module
SD Card I/O level is specified as 3.3V and not CMOS
VDD_IO
.