Rev. 2.00 XRD98L61 One Shot (CAL Only) Mode In this mode, the CAL signal is used to activate the DC restore clamp and to define the optical " />
參數資料
型號: XRD98L61AIV-F
廠商: Exar Corporation
文件頁數: 25/38頁
文件大?。?/td> 0K
描述: IC CCD DIGITIZER 12BIT 48TQFP
標準包裝: 250
位數: 12
通道數: 1
電壓 - 電源,模擬: 2.7 V ~ 3.6 V
電壓 - 電源,數字: 2.7 V ~ 3.6 V
封裝/外殼: 48-TQFP
供應商設備封裝: 48-TQFP(7x7)
包裝: 托盤
31
Rev. 2.00
XRD98L61
One Shot (CAL Only) Mode
In this mode, the CAL signal is used to activate the DC
restore clamp and to define the optical black pixels for
calibration. The CAL pulse should frame the longest
group of OB pixels at either the end or beginning of
each line. The DC restore Clamp switch is turned ON
during the first four pixels of each CAL pulse. The
remaining pixels under the CAL pulse are used for
black level calibration.
End of Line N
Start of Line N+1
Active Video
Pixels
OB pixels
Vertical Shift
Dummy &
OB pixels
CAL
(Black Level)
CLAMP
(DC restore)
CCD
Signal
Active Video pixels
t
CAL
t
CLAMP
Vert. Shift Reject
(internal)
Disconnect CDS from
input pins
Figure 21. Line Rate Timing with OneShot=0, VSreject=1 & ClampCal=1
The One Shot mode also has an option to disconnect
the CDS from the input pins during the Vertical Shift
time. To enable this option, write a “1” to the VSreject
bit in the Clock register. The signal at the CLAMP pin
is used to define the Vertical Shift period (i.e. the time
when the CDS is disconnected from the input pins).
VS Reject Option (One Shot mode)
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