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CS7620 데이터시트(PDF) 18 Page - Cirrus Logic

부품명 CS7620
상세설명  CCD IMAGER ANALOG PROCESSOR
PDF  70 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS7620 데이터시트(HTML) 18 Page - Cirrus Logic

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CS7620
18
DS301PP2
trolled through the serial interface as described be-
low.
The pixel period is broken down into 8 equal time
periods. By delaying the clock a given number of
these time periods, different phases are created.
This is shown in Figure 19. These clock phases are
labeled t0-t7 and are shown relative to an idealized
CCD signal and the internal sampling signals.
Using these eight clock phases, the user may set the
rising and falling edges of each horizontal pixel
clock at 1/8 of a pixel clock period. In addition, the
user may set each horizontal signal to a default
state when the output lines are to be held constant
during blanking. The default timing for the hori-
zontal signals is shown in Figure 20 and Table 2.
See the register listing for more details.
Ideal
CCD Signal
CK_FT
CK_DT
internal
sampling
clocks
Figure 19. Detailed Signal Timing Showing Internal Clock Phases
H2
H3
H1
H4
RG
t0
t4 t5 t6 t7
t0
t3 t4 t5 t6 t7
t1 t2
t3
t1 t2
Ideal
CCD Signal
default
settings
Figure 20. Default Timing of Horizontal Signals to the CCD
Signal
Rising edge
Falling edge
Hold level
H1
t0
t5
high (‘1’)
H2
t2
t7
high (‘1’)
H3
t4
t1
high (‘1’)
H4
t6
t3
low (‘0’)
Table 2. Default Phases for Horizontal Signal Edges



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