Matthew Smith

MC908QB8 - apparent discrepancy between datasheet & parametric search

Discussion created by Matthew Smith on Feb 28, 2009
Latest reply on Mar 2, 2009 by bigmac

I have before me a MC908QB8MPE.


The datasheet for this states in part 1.1, General Description, Summary of Device Variations:


MC68HC908QB8 - 16-Bit Timer Channels: 4.


Today I chanced to look back on the site to get an idea of current cost; when I found the device that I had on the parametric table, it has this to say on timers:


# timers: 1; timer channels: 1; timers size (bits): 10.


As the datasheet I have on my machine is a couple of years old, I downloaded the one from the link right next to the appropriate part on the parametric page. Same datasheet.


Would someone be so good as to enlighten me as to what exactly is going on here? It looks like something has either been written in an unclear/confusing manner or maybe just plain incorrect.


I'd really like to be told that the devices I have do have 4 timers - I've got a really cool synthesiser design in which these would work beautifully. (I'll be Open Sourcing the design if the prototype works out. Will post a link here, of course.)

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