First you stated in the Subject "That info is not in the user's manual".
That info is in the User's Manual. All 85 PAGES of "Section 10, Electrical Characteristics".
Lots of sections give AC Timing for the Bus, SPI, Timer, SI., SCC, SMC, DMA, PIO and so on.
Section 10.5 gives the "DC Electrical Specifications" (Voltage levels)
Sections 10.3 and 10.6 give Power.
Motorola/Freescale's later documents put the register descriptions in the "User Manual" and the electrical characteristics in the "Data Sheet", but back in the 1990's (this product dates from 1993, the User Manual from 1998) they put everything in the one document. On PAPER.
That's as good as it gets. I don't think there are any other documents.
If you need something else you're going to have to detail exactly what you need to know and also detail where the User manual is lacking.
You're from Avnet, so I guess you're trying to answer a customer query. Maybe you should post the technical contents of that query.
Tom