參數(shù)資料
型號: OV7620
廠商: Electronic Theatre Controls, Inc.
英文描述: OV7620 SINGLE-CHIP CMOS VGA COLOR DIGITAL CAMERA
中文描述: OV7620的單芯片CMOS VGA彩色數(shù)碼相機
文件頁數(shù): 24/60頁
文件大?。?/td> 313K
代理商: OV7620
OV7620 Product Specifications - Rev. 1.2 (5/13/00)
OMNIVISION TECHNOLOGIES INC.
24
Preliminary
Company Confidential
FIG 1.6 Frame Exposure Timing
Note: Tpr = 492 * 4 * Pclk, Pclk is internal pixel clock. For default 27MHz, Tclk=74 ns. If CLK<5:0> set to
divided number, Tclk will increase accordingly.
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
when
HREF
=1.
Tset = Tin + Tpr + Tex. Tset > Tpr + Tin. Because Tin is uncertain, so exposure time setting resolution is
Ths (one line).
FREX
DATA
OUTPUT
HSYNC
VSYNC
ARRAY
PRECHARGE
Black Data
Invalid Data
Valid Data
1 Frame (484 line)
Prechage begin at rising edge of HSYNC
Array Exposure Period Tex
Array Precharge
period Tpr
Tset
Next Frame
Mechanical shutter closed
Head of Valid data
(8 line)
Tin
Ths
Thd
HREF
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