phyCORE-OMAP44xx
Part I: PCM-049/phyCORE-OMAP44xx System on Module
L-760e_1 © PHYTEC Messtechnik GmbH 2012
47
1.7 SD / MMC Card Interfaces
The phyCORE-OMAP44xx features two dedicated SD / MMC Card interface (SDMMC1 and SDMMC5). On the
phyCORE-OMAP44xx the interface signals extend from the controllers first and fifth Secure Digital Host
Controller to the phyCORE-Connector.
show the location of the different interface signals
on the phyCORE-Connector. The Secure Digital Host Controllers are fully compatible with the SD Card Specifica-
tion 2.0 and SD I/O Specification 2.0. The SDMMC1 host controller supports up to 8 data channels with a
maximum data rate of 384 Mbps (768 Mbps in 8-bit MMC DDR mode), the SDMMC5 host controller supports up
to 4 data channels with a maximum data rate of 384 Mbps (refer to the OMAP44xx Reference Manual for more
information). The SDMMC1 host controller is supplied by the VCC_MMC1 voltage, which is generated by the PMIC
TWL6030. Configuring the PMIC via I
2
C interface I2C1 allows to switch VCC_MMC1 from 3 V (default) to 1.8 V.
VCC_MMC1 is also available as reference voltage on pin X1B18 of the phyCORE-Connector. Please consider the
maximum load allowed for the reference voltage VCC_MMC1 to avoid any disfunction or damage of the module.
The maximum load is 150 mA.
Because of compatibility reasons a card detect signal (X_PMIC_MMC1_CD) is added to the SDMMC1 Card
Interface. This signal connects to the MMC input pin of the PMIC TWL6030 (U5), which can control the state of
the SDMMC1 supply voltage VCC_MMC1.
Pin #
Signal
I/O
SL
Description
X1A19
X_SDMMC1_CMD
I/O
VCC_MMC1
SDMMC1 command
X1A20
X_SDMMC1_CLK
O
VCC_MMC1
SDMMC1 clock
X1A21
X_SDMMC1_DAT0
I/O
VCC_MMC1
SDMMC1 data bit 0
X1A23
X_SDMMC1_DAT1
I/O
VCC_MMC1
SDMMC1 data bit 1
X1A24
X_SDMMC1_DAT2
I/O
VCC_MMC1
SDMMC1 data bit 2
X1A25
X_SDMMC1_DAT3
I/O
VCC_MMC1
SDMMC1 data bit 3
X1A26
X_SDMMC1_DAT4
I/O
VCC_MMC1
SDMMC1 data bit 4
X1A28
X_SDMMC1_DAT5
I/O
VCC_MMC1
SDMMC1 data bit 5
X1A29
X_SDMMC1_DAT6
I/O
VCC_MMC1
SDMMC1 data bit 6
X1A30
X_SDMMC1_DAT7
I/O
VCC_MMC1
SDMMC1 data bit 7
X1B27
X_PMIC_MMC1_CD I
1.8 V
SDMMC1 card insertion and
extraction detection
X1B18
VCC_MMC1
-
-
SDMMC1 reference voltage
Table 15:
Location of SD/ MMC Card Interface Signals (SDMMC1)
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