MSC C10M-BT / MSC C10M-BTC
User Manual
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2.12.13 SDIO
Signal
Pin
Type
Signal
Level
Power
Rail
Remark /
Tolerance
PU/PD/SR
Description
Source /
Target
SDIO_CD#
( GPO3 )
I
CMOS 1.8V/3.3V 1.8V / 3.3V
iPU = 20 KΩ
SDIO Card Detect. This signal indicates when a SDIO/MMC card is
present. This pin is mapped to GPO3 and used as an input when
used for SD card support.
BT SOC
SDIO_CLK
( GPO0 )
O
CMOS 1.8V/3.3V 1.8V / 3.3V
iPD = 20 KΩ
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. This pin is mapped to GPO0.
BT SOC
SDIO_CMD
( GPO1 )
O
CMOS 1.8V/3.3V 1.8V / 3.3V
iPU = 20 KΩ
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. This pin is mapped to GPO1
BT SOC
SDIO_WP
( GPO2 )
I
CMOS 1.8V/3.3V 1.8V / 3.3V
iPD = 20 KΩ
SDIO Write Protect. This signal denotes the state of the write-protect
tab on SD cards. This pin is mapped to GPO2 and used as an input
when used for SD card support
BT SOC
SDIO_DAT[0:3]
( GPI[0:3] )
IO
CMOS 1.8V/3.3V 1.8V / 3.3V
iPU = 20 KΩ
SDIO Data lines. These signals operate in push-pull mode. These
pins are mapped to GPI[0:3].
BT SOC
Note: Bus Speed Mode SDIO 3.0 (UHS-I) supported.
