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Driving LED martix with K70

Question asked by Rowan Sylvester-Bradley on Nov 27, 2015
Latest reply on Nov 29, 2015 by Hui_Ma


I have a 16 by 96 red/green LEd display panel, that I need to drive from a K70 processor (actually a Kinetis K-70-SOM board). I'm hoping some of you can suggest the best way to do this?
The display is driven by two 96-bit shift registers with latches (one for red, one for green), so I need to shift 96 bits into each register, latch the data into the drivers, and then repeat for each column on the display. Some questions:
- Can I use the K70's SPI interface for doing this? The display interface is not explicitly an SPI interface, but it is very similar.
- Can I drive two data bits with the same clock using the SPI interface?
- How fast can the K70 load the serial shift register?

Thanks for your help - Rowan