Hardware Documentation efus™A9X+ efus™A9Xr2
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4.4 SD/MMC card
The interface is supporting a SD card channel. For specification and licensing please refer the
website of the SD Association http://www.sdcard.org.
Unused signals should be left unconnected.
No. Name
Description
Onboard PU
16
SD_A_WP
SD card A write protect input
18
SD_A_CD
SD card A card low active detect input
20
SD_A_DAT2
SD card A data signal
22
SD_A_DAT3
SD card A data signal
24
SD_A_CMD
SD card A command signal
26
SD_A_VCC
SD card A power out
28
SD_A_CLK
SD card A clock signal
32
SD_A_DAT0
SD card A data signal
34
SD_A_DAT1
SD card A data signal
81
SD_B_WP
SD card B write protect input
83
SD_B_CD
SD card B card low active detect input
65
SD_B_DAT2
SD card B data signal
67
SD_B_DAT3
SD card B data signal
69
SD_B_CMD
SD card B command signal
100k pull-up
71
SD_B_VCC
SD card B power out
73
SD_B_CLK
SD card B clock signal
77
SD_B_DAT0
SD card B data signal
100k pull-up
79
SD_B_DAT1
SD card B data signal
SD_A card signals are shared with WLAN at HW Rev 1.12.
If WLAN is mounted SD_A is not available.
SD_A card signals are shared with eMMC at HW Rev 1.20 and later.
If eMMC is mounted SD_A is not available.
