Specifications

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3.3. Graphics System
The EM-X270 graphics system is based on the LCD controller integrated in the PXA270
chip. The LCD controller provides an interface between the PXA270 processor and a flat-
panel display module. The flat-panel display module can be either passive (DSTN) or
active (TFT), or an LCD panel with internal frame buffering.
The EM-X270 board features an LCD panel connector (P11) that is designed for
connecting the TD035STEE1 LCD module. The TD035STEE1 is a 3.5” transflective
active matrix color 480x640 TFT LCD module that includes a touch panel, backlight and
TFT LCD panel. All the signals necessary for graphics output, touch-screen support and
backlight control are routed to the LCD panel connector.
The LCD controller signals are also routed to the expansion connector. The EM-X270 may
be integrated with other types of LCD panels either through LCD connector (P11) or
through expansion connector. See section 4.5 for details about the LCD connector.
LCD Controller Features
The following list describes features supported by the PXA270 processor LCD controller:
 Display modes
- Support for single- or dual-scan display modules
- Passive monochrome mode supports up to 256 gray-scale levels (8 bits)
- Support for up to 16-bit per pixel single-scan color displays without an internal frame
buffer
 Support for display sizes from 1x1 to 800 x 600 pixels
 Supports pixel depths of 2, 4, 8 and 16 bits per pixel (bpp) in RGB format
 Supports a hardware cursor for single-scan displays (see Section 7.4.11 in PXA270
manual for cursor modes and sizes)
 Programmable toggle of AC bias pin output (toggled by line count)
 Programmable pixel clock from 52.0 MHz down to 25.4 kHz (104.0 MHz/2 to 13
MHz/512)
 Backward compatible with the Intel's PXA255 graphics controller
3.4. Audio System
The audio system of the EM-X270 is implemented with the Wolfson WM9715L codec
chip connected to the AC97 port of the PXA270.