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OPT9221: adjusting pix_cnt_max to increase frame rate?

Part Number: OPT9221

Hi :

  Before i haved discussed with ToF engineer for OPT9221 about decrease the frame rate .The concept we discuss that time is use the formula as below.

But now,there are customers ask for higher framerate i use the same concept to change the pix_cnt_max (FPS90), but the output image is damaged as below

left picture is the tof image ,the right side is the RGB sensor 

the regisster setting is like this , is anything i missed so the image is damaged???

mod_m1,17,
mod_n1,2,
mod_ps1,5,
intg_duty_cycle,15,
tg_dis,1,
pix_cnt_max,159744,
quad_cnt_max,4,
sub_frame_cnt_max,1,
blk_blank_size,256,
vd_active,100000,
tg_dis,0,