Mitsumi AM/FM tuner

Hello!

Has anyone experience with Mitsumi tuners? I have high-end grade tuner which is quite black box for me still. I don't know how to use it. I even opened it and all I know now there is tuner IC from sanyo.

In web there is datasheet for similar tuners.

http://www.mitsumi.co.jp/Catalog/hifreq/tuneram/fae385a02_e.html

As you can see that is only pinout of tuner. After I know what that bus is I might think about talking with Atmel to it and trying to guess the protocol.