ov7620 OmniVision Technologies, Inc, ov7620 Datasheet - Page 25
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ov7620
Manufacturer Part Number
ov7620
Description
Single-chip Cmos Vga Color Digital Camera
Manufacturer
OmniVision Technologies, Inc
Datasheet
1.OV7620.pdf
(58 pages)
- Current page: 25 of 58
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OV7620/OV7120 Product Specifications - Rev. 1.2 (7/10/01)
Frame exposure mode timing is as below:
Note: Tpr = 492 * 4 * Pclk, Pclk is internal pixel clock. For default 27MHz, Tclk=74 ns. If CLK<5:0> set to
Tex is array exposure time which is decided by external master device.
Tin is undetermined due to the use of HSYNC rising edge to synchronize FREX, Tin < Ths
When FREX=0, there are 8 lines of data output before valid data output. Thd = 4 * Ths. Valid data is output
Tset = Tin + Tpr + Tex. Tset > Tpr + Tin. Because Tin is uncertain, so exposure time setting resolution is
FREX
HSYNC
ARRAY
PRECHARGE
DATA
OUTPUT
VSYNC
HREF
divided number, Tclk will increase accordingly.
when HREF=1.
Ths (one line).
Invalid Data
Array Precharge
period Tpr
Tset
Tin
Prechage begin at rising edge of HSYNC
FIG 0.6 Frame Exposure Timing
Thd
Array Exposure Period Tex
(8 line)
Head of Valid data
Mechanical shutter closed
Preliminary
Valid Data
1 Frame (484 line)
Company Confidential
OMNIVISION TECHNOLOGIES INC.
Next Frame
Ths
Black Data
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