Please see MX5QSB HW use guide:
3.16. Expansion Header (J13)
A 120-pin Expansion Port Header is provided on the Quick Start board for use with many optionally
expansion boards available from Freescale, or for custom designed boards made be the developer. At
the time of initial production, the following expansion boards are available from Freescale:
• MCIMXHDMICARD HDMI signal output daughter card
• MCIMX28LCD 4.3” WVGA Touch Panel LCD Display
The Expansion Port makes the following features of the i.MX53 Processor available to be used on a
custom built expansion card:
• Two Serial Peripheral Interfaces (SPI) CSPI, eCSDPI2
• Two I2S/SSI/AC97 Ports AUDMUX4, AUDMUX5
• Two Inter-Integrated Circuits (I2C) I2C1, I2C2
• 2 UARTs UART4, UART5
• SPDIF Audio
• USB ULPI Port USBH2
• 24-bit Data and display control signals
• Resistive Touch Screen Interface
• Various Voltage rails