My project involves writing 11 bits of digital data at exactly the same time. PortD is 8 bits and PortB is the remaining 3 bits. Any suggestions how I can get PortB and PortD to output their data simultaneously? Why simultaneously?? On the Casio keyboard there is a 12-conductor ribbon going from th…

Output from PortB & PortD at the same time on Uno r3

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