AN2405 Freescale Semiconductor / Motorola, AN2405 Datasheet - Page 12

• Manufacturer Part Number: AN2405
• Description: Supplemental Information for LCD Interfacing for the MC9328MX1 Application Processor Application Note
• Manufacturer: Freescale Semiconductor / Motorola

Other Considerations
When an Under-Run occurs, the data output will be incorrect. When normal data service—that is, no more
Under-Run, is restored the LCDC outputs data correctly. However, the LCD panel is a sequential device with no
error checking protocol. Even though the LCDC returns to correct operation, the LCD panel will return to normal
operation only after a VSYNC signal. This is to fully synchronize the data between LCDC and the LCD panel.
Under-run errors will be more prone to occur on higher resolution panels such as VGA (640x480). Tests on the
overall system must take place to make sure the usage of system bus does not trigger under-run errors.
i.MX Supplemental Information for LCD Interfacing Application Note, Rev. 1.1
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Freescale Semiconductor