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of OTG port depends on the USB control signal (USB_ID). If asserted high, the OTG is set to client and if low, the OTG port is set to host. All
ports are capable of supporting USB 1.1 and 2.0 compliant devices.
5.6
SD/SDIO/MMC
SDIO stands for Secure Digital Input Output. Devices that support SDIO can use small devices such as SD-Card or MMC-Card flash memories.
The SD/SDIO/MMC cards communicate with the host system via the Ultra Secured Digital Host Controller (uSDHC). This controller acts as
a bridge by sending commands and accessing data to and from the cards. The Freescale
®
i.MX6 processor on the conga-QMX6 provides
SD/SDIO/MMC controllers (SD1-SD4) for communicating with different SD, SDIO and MMC devices.
The conga-QMX6 offers one SDIO interface on the MXM connector via the Freescale
®
i.MX6 SD4 port. Two other SDIO ports provided by the
Freescale
®
i.MX6 processor are supported onboard the conga-QMX6. These ports (SD2 and SD3) connect the onboard 4 bit micro SD and the
onboard 8 bit eMMC respectively
The SDIO ports support SDIO Revision 1.1, SD Memory Card Specification Revision 3.0 and MMC Revision 4.4.
5.7
HDA/I2S/AC’97
The conga-QMX6 uses the I2S format for audio signals. These signals are derived from the Synchronous Serial Interface (SSI) of the Freescale
®
i.MX6 processor. The SSI is a full duplex serial port that allows communication with external devices using a variety of serial protocols. The I2S
protocol is part of the protocols supported by the Freescale
®
i.MX6 Cortex A9 processor. The SSI supports up to 1.4 Mbps.
Note
The conga-QMX6 currently supports only I2S format.
5.8
LVDS
The LVDS Display Bridge (LDB) from the Freescale
®
i.MX6 Cortex A9 processor found on the conga-QMX6 offers two LVDS channels, with up
to 170 Mhz pixel clock. Each channel consists of one clock pair and four data pairs. The LDB supports the flow of synchronous RGB data from
the Image Processing Unit (IPU) to external display devices through LVDS interface.
The LVDS interface supports 18 bit and 24 bit dual channel. The LVDS interface also supports various resolutions but with stipulated maximum
data rates. The data rates supported are as follows:
For single channel output: Up to 85 MHz per interface (e.g 1366x768 @ 60 Hz + 35 % blanking).
