Sdio/Mmc; Table 11 Sdio Signal Descriptions - Congatec Qseven conga-QMX6 User Manual

9.6

SDIO/MMC

Table 11 SDIO Signal Descriptions
Signal Pin # Description
SDIO_CD# 43
SDIO_CLK 42
SDIO_CMD 45
SDIO_LED 44
SDIO_WP 46
SDIO_PWR# 47
SDIO_DAT0 49
SDIO_DAT1 48
SDIO_DAT2 51
SDIO_DAT3 50
SDIO_DAT4 53
SDIO_DAT5 52
SDIO_DAT6 55
SDIO_DAT7 54
Copyright © 2013 congatec AG
SDIO Card Detect. This signal indicates when a SDIO/MMC card is present.
SDIO Clock. With each cycle of this signal a one-bit transfer on the command and each
data line occurs. This signal has maximum frequency of 48 MHz.
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 LED. Used to drive an external LED to indicate when transfers occur on the bus.
SDIO Write Protect. This signal denotes the state of the write-protect tab on SD cards.
SDIO Power Enable. This signal is used to enable the power being supplied to a SD/
MMC card device.
SDIO Data lines. These signals operate in push-pull mode.
I/O
I/O 3.3V
O 3.3V
I/O 3.3V
OD/PP
O 3.3V
I/O 3.3V
O 3.3V
I/O 3.3V
PP
QMX6m03
PU/PD Comment
PU 10k
3.3V
PU 10k
3.3V
PU 10k
3.3V
PU 10k
3.3V
Connected to GPIO
49/63