ov7620 OmniVision Technologies, Inc, ov7620 Datasheet - Page 36

• Manufacturer Part Number: ov7620
• Description: Single-chip Cmos Vga Color Digital Camera
• Manufacturer: OmniVision Technologies, Inc

OV7620/OV7120 Product Specifications - Rev. 1.2 (7/10/01)
As shown above, HS<7:0> defines the starting pixel within a scan line, HE<7:0> defines the ending pixel
Identical value for HS/HE or VS/VE is not permitted since it causes undefined window size.
If end point is lower than the starting point, the window begins from the starting point and ends at the far
The window size calculate formula is as below:
1. Horizontal size: VGA mode: Horizontal window size = (Register [18] - Register [17])*4.
2. Vertical size: VGA mode: Vertical window size = (Register [1A]- Register [19]+1);
HREF
within a scan line. VS<7:0> defines the starting row within a field, VE<7:0> defines the ending
row within a field. VS/VE automatically defines the window height of a image frame. The rect-
angular window defined by HS/HE/VS/VE is the active image window. Only pixels insides this
window is valid, along with the HREF timing signals, black level substitutes the pixel data
when outside the active window.
end of the available image boundary.
QVGA mode: Horizontal window size = (Register [18] - Register [17])*2.
QVGA mode: Horizontal window size = (Register [1A] - Register [19]+ 1).
VS
VE
HS
FULL image boundary
FIG 0.11 Window Sizing
Active Window
Preliminary
HE
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