Understanding Timing Diagram of VPIF

  Hi,

   I wanted to understand certain terminologies used in Raw Capture Progressive Mode:

a. Vertical Blanking , min = 3lines                  ---------- Is it same as telling it needs a minimum of 3 rows

b. Horizontal Blanking, min = 21 clk              ---------- Is it same as telling it needs a minimum of 21 VP_CLK0 and 1 input clk or is it mentioned in number of rows.

c. Frame Blanking, min = 369 clk                   --------- ???????????????

d. Valid data period, min= 2 clk                      ---------- Why is it less than horizontal blanking period ? and what it is ?

Below is the timing diagram of Digital video port of OV2643

Also the master clock generated by CDCE913PW on UI board generates normal pulse of 24.0000080 Mhz

while VP_CLKIN0 and 1 are driven by 48 Mhz PCLK generated by camera module, its shape is saw tooth form.

Does the wave form shape of VP_CLKIN 0and 1 affect the VPIF ???