Frequently Asked Questions

What is the maximum clock frequency on LCD-CLKIN (external pixel clock for the LCD controller) on LPC2478/LPC3250?

The maximum clock frequency on LCD-CLKIN is not specified from NXP on LPC2478/LPC3250. It is however important to calculate the databus bandwidth needed on the external memory bus (for feeding pixel data to the LCD controller in the chip). NXP has created an Excel-sheet (available from their website) for calculating this. Embedded Artists has experimented with clock frequencies up to 40MHz, which seems to be an upper, practical limit.

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