Led module P2 128*64 1/32 driver

Hi
I try to control a 32x32RGB panel directly (HUB73, MBI5151 + RT5958). The RT5958 is controlled via A,B,C. Since the timing of the RT5958 is only partly clear to me (what exactly does BK do?) I am looking for a data sheet with timing. I assume that the control of the RT5957 is the same.