The LM628.pdf datasheet http://www.ti.com/lit/ds/symlink/lm628.pdf, page page 11 says: "The integral signal is maintained to 24 bits, but only the top 16 bits are used." This means the Integral part is right shifted by 8 (divided by 256). Then it coninues " The 16 bits are right-shifted eight positions and multiplied by filter coefficient ki to form the term which contributes to the motor control output." Does this mean the Integral part is right shifted by 16 now? However, Fig.19 of the app guide http://www.ti.com/lit/an/snoa184c/snoa184c.pdf shows the integral part is R shifted only 8bit before mult with Ki. Does anyone know for sure that it's shifted by 8 or 16 bits? I had posted my question to TI, and they refered me to this forum.
This is my first post, and I appreciate all of your helps.
Thanks,
Brian