I tied my stub tennoned posts to my timber sills with straps like those Jim has illustrated. The sills sit on a 2x12 PT subsill and are tied to the foundation with long J bolts.
In the addition where I was working with 2x8 floor framing and just the 2x12 PT sill I rabbeted my post bottoms to fit around the rim joist and used a lag bolt to tie them together.



I'm afraid my picture isn't as informative as Jim's but you can just see the rabbets at the bottom of the post.