DIN sync with LPC17

MIDIbox SEQ
1

Is anyone else using DIN Sync with an LPC17?

2

No, what’s your set up? Have you level-shifted the 3.3 V signal?

3

So far I’ve just put a din out on j28 and didn’t measure a voltage at all when there should be 3.3v on run I believe. Then there would be something to level shift anyway.

4

Please explain your set up. Are you using the Wilba control surface? Do you have the SEQ running correctly? Have you edited the hardware config file? 

 

5

This is the schematic which shows the 74HCT541 based level shifter at J28:

http://www.ucapps.de/mbhp/mbhp_core_lpc17_output_buffers.pdf

 

The usage of this chip is not only recommended for voltage adaption, but also to protect the LPC17 IO pins against short circuits.

 

Best Regards, Thorsten.