PICO-IMX6 REV. A1. HARDWARE MANUAL
– VER 1.01 – JAN 28 2016
Page
38
of
64
3.11. SDIO/MMC Interface
The PICO-IMX6 features a MMC / SD / SDIO host interfaces connected to the NXP i.MX6 integrated
“Ultra Secured Digital Host Controller” (uSDHC).
The following main features are supported by uSDHC:
Compatible with the MMC System Specification version 4.2/4.3/4.4/4.5.
Conforms to the SD Host Controller Standard Specification version 3.0.
Compatible with the SD Memory Card Specification version 3.0 and supports the
“
Extended
Capacity SD Memory Card
”
.
Compatible with the SDIO Card Specification version 3.0.
Supports 1-bit / 4-bit SD and SDIO modes, 1-bit / 4-bit
The MMC/SD/SDIO host controller can support a single MMC / SD / SDIO card or device.
For additional details, please refer to the “Ultra Secured Digital Host Controller (uSDHC)” chapter of the
“i.MX6 Reference Manual”.
Table 17 - SDIO/MMC Interface Signal Description
PIN
CPU
BALL
CPU PAD NAME
Signal
V
I/O Description
E1_58
D20
SD1_CLK
SD1_CLK
1V8
I/O MMC/SDIO Clock
E1_60
M21
EIM_DA9
EIM_DA9
1V8
I
SD Card detect input (Active
low)
E1_62
B21
SD1_CMD
SD1_CMD
1V8
I/O MMC/SDIO Command
E1_64
E19
SD1_DAT2
SD1_DAT2
1V8
I/O MMC/SDIO Data bit 2
E1_66
A21
SD1_DAT0
SD1_DAT0
1V8
I/O MMC/SDIO Data bit 0
E1_68
F18
SD1_DAT3
SD1_DAT3
1V8
I/O MMC/SDIO Data bit 3
E1_70
C20
SD1_DAT1
SD1_DAT1
1V8
I/O MMC/SDIO Data bit 1
