I2C 7 segment control chip

[TheAncientOne]

http://www.nxp.com/pip/SAA1064T.html#pricing

How about this for BPM display. Might take some load off the CPU.

Mike

[TK.]

Nice chip, and it's even available at Reichelt!

For applications which need to update the digits very often, there isn't really a benefit for the CPU load - quite the contrary: two MIOS_DOUT_SRSet take much less cycles than doing external IIC transfers. Yes, they have to be done periodically, so it has to be estimated depending on the update period if it improves or worsens the performance. In general I would say: the impact can be ignored.

But it is a flexible solution which can be added even when the core already services 16 DOUT registers.

And the wiring is less complex.

Thanks for the hint!

Best Regards, Thorsten.

P.S.: I've already added the DOUT based BPM digit driver into MBSEQ V3.2, so if somebody reads about this in the MBSEQ hardware page, don't mix it with this solution.