camisp-194
INIT
FS
LE
LS
FE
False sync
code
LE
shifted
sync code
FE
shifted
sync code
Frame end d
etectio
n not
alig
ned
Frame e
nd de
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n
Detected sync c
ode is
FS
False code
Line end
dete
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Lin
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nd
de
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Lin
e e
nd
de
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no
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Line
start dete
ction
False code
False co
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Fa
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F
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F
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align
ed
Public Version
Camera ISP Functional Description
www.ti.com
Figure 6-58. Camera ISP CSI1/CCP2B Synchronization State-Machine
In case of synchronization code errors, the CSI1/CCP2B receiver can reinitialize itself. No software
intervention is required for most synchronization-code errors:
•
Line-end shifted code: The receiver either removes the additional bits or adds dummy bits. The next
LS synchronization code resynchronizes the state-machine to normal behavior. A shifted line-end (LE)
synchronization code triggers an LE_IRQ event.
•
Frame-end shifted code: The receiver either removes the additional bits or adds dummy bits. The next
FS synchronization code resynchronizes the state-machine to normal behavior. A shifted frame-end
(FE) synchronization code triggers an FE_IRQ event.
•
False synchronization code: The current frame is lost. The receiver stops acquiring data, flushes its
internal FIFO, and asserts the FSC_IRQ event. The next FS synchronization code resynchronizes the
state-machine to normal behavior.
6.4.2.2.4.1.1 Camera ISP CSI1/CCP2B Frames
Structure
shows the generic (non-JPEG) description of a CSI1/CCP2B frame with synchronization
codes. Each CSI1/CCP2B frame line is composed of a finite number of 32-bit words.
1162
Camera Image Signal Processor
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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