OV7620 datasheet(17/60 Pages) ETC

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OV7620 Product Specifications - Rev. 1.2 (5/13/00)

OMNIVISION TECHNOLOGIES INC.

Preliminary Company Confidential

Note: In Interlaced Mode, there are Even/Odd field different (t8). When In Progressive Scan Mode, only

frame timing same as Even field(t8).

After VSYNC falling edge, OV7620 will output black reference level, the line number is Tvs,

which is the line number between the 1st HREF rising edge after VSYNC falling edge and 1st

valid data CHSYNC rising edge. Then valid data, then black reference, line number is Tve, which

is the line number between last valid data CHSYNC rising edge and 1st CHSYNC rising edge

after VSYNC rising edge. The black reference output line number is dependent on vertical win-

dow setting.

When in default setting, Tvs = 14*Tline, which is changed with register register 19<7:0>. If in

Interlaced Mode, register 19<7:0> change 1 step, Tvs increase 1 line. If in Progressive Scan

Mode, register 19<7:0> step equal to 2 line.

When in default setting, Tve = 4*Tline for Odd Field, Tve = 3*Tline for Even Field, which is

changed with register register 1A<7:0>. If in Interlaced Mode, register 1A<7:0> change 1 step,

Tve increase 1 line. If in Progressive Scan Mode, register 1A<7:0> step equal to 2 line.

In Progressive Scan Mode, Tve = 3*Tline and Tvs = 35*Tline.

Table 1.4: ZV Port AC Parameter

Symbol

Parameter

Min.

Max.

PCLK fall timing

4 ns

8 ns

PCLK low time

30 ns

PCLK rise time

4 ns

8 ns

PCLK high time

30 ns

PCLK period

74 ns

Y/UV/HREF setup time

10 ns

Y/UV/HREF hold time

20 ns

VSYNC setup/hold time to HREF

1 us

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