S5L8700 datasheet
The datasheet for the S5L8700X was found here. It matches the official Samsung 8700 info page. The datasheet describes every pin (page 1-5) and instruction (page 3-1) of the 8700 series in detail.
Package differences
The pin locations described in the datasheet are not the actual locations for the iPod's 226-pin FBGA version. This forum thread describes the pinout of another S5L8700 package in another device (see right for ball layout).
Helpful pages
http://www.samsung.com/global/business/semiconductor/support/PackageInformation/download_FBGA.html http://www.rockbox.org/twiki/bin/view/Main/SamsungSA58#SA58700_codename_Blues