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Do you have size limit or memory size calculator to help set the size of the frame buffer?

Question asked by LPCware Support on Mar 30, 2016

The size limit for the LCD frame buffer is 1024x1024x4, which would be a 1k x 1k x 24bpp display. You can compute a frame buffers memory requirements by multiplying the X resolution by the Y resolution by the color depth in bytes. For example, a 320x240 display at 16bpp (2bytes per pixel) would need 320x240x2 = about 150kB. You can also use the bandwidth calculator to compute this value.

LPC247x bus bandwidth calculator: https://community.freescale.com/servlet/JiveServlet/download/388794-1-377714/lpc247x.lcd_.bus_.load_.calculator.xlsx

LPC178x and LPC40xx bus bandwidth calculator: https://community.freescale.com/servlet/JiveServlet/download/388794-1-377754/lpc178x.lcd_.bus_.load_.calculator.xls

LPC18xx and LPC43xx bus bandwidth calculator: https://community.freescale.com/servlet/JiveServlet/download/388794-1-377755/lpc18xx.lpc43xx.lcd_.bus_.load_.calculator.…

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