ov7620 OmniVision Technologies, Inc, ov7620 Datasheet - Page 35

• 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)
Register 17 - rw: Horizontal Window start
Register 18 - rw: Horizontal Window end
Register 19- rw: Vertical Window start
Register 1A- rw: Vertical Window end
Bits
Default
Bits
Default
Bits
Default
Bits
Default
HE<7:0> - selects the ending point of HREF window, each LSB represents four pixels for full resolution
VS<7:0> - selects the starting row of vertical window, in full resolution mode, each LSB represents 1scan
VE<7:0>- selects the ending row of vertical window, in full resolution mode, each LSB represents 1scan
HS<7:0> - selects the starting point of HREF window, each LSB represents four pixels for Inter-
HS7
HE7
VS7
VE7
0
1
0
1
laced/Progressive full resolution mode, two pixels for QVGA resolution mode, this value is set
based on an internal column counter, the default value corresponds to 640 horizontal window.
Maximum window size is 664. see window description below. HS<7:0> programmable range is
[2C]- [D2], and should less than HE<7:0>. HS<7:0> should be programmable to value larger
than or equal to [2C]. Value larger than [D2] is invalid. See Figure 1.14.
and two pixels for QVGA resolution, this value is set based on an internal column counter, the
default value corresponds to the last available pixel. The HE<7:0> programmable range is
[2D] - [D2]. HE<7:0> should be larger than HS<7:0> and less than or equal to [D2]. Value
larger than [D2] is invalid. See Figure 1.14.
line in one field for Interlaced Mode, 2 scan line in one frame for Progressive Scan Mode. In
QVGA resolution (set by register 14 bit 5), each LSB represents 1 scan line in one field for
Interlaced Mode, 1scan line in one frame for Progressive Scan Mode. See Figure 1.14. Min. is
[05], max. is [F6] and should less than VE<7:0>.
line in one field for Interlaced Mode, 2 scan line in one frame for Progressive Scan Mode. In
QVGA resolution, each LSB represents 1 scan line in one field for Interlaced Mode, 1scan line
in one frame for Progressive Scan Mode. See Figure 1.14. Min. is [05], max. is [F6] and should
larger than VS<7:0>.
HS6
HE6
VS6
VE6
0
1
0
1
HS5
HE5
VS5
VE5
1
0
0
1
HS4
HE4
VS4
VE4
0
0
0
1
Preliminary
HS3
HE3
VS3
VE3
1
1
0
0
HS2
HE2
VS2
VE2
1
1
1
1
Company Confidential
OMNIVISION TECHNOLOGIES INC.
HS1
HE1
VS1
VE1
1
1
1
0
HS0
HE0
VS0
VE0
1
1
0
1