AN2414 Freescale Semiconductor / Motorola, AN2414 Datasheet - Page 8

• Manufacturer Part Number: AN2414
• Description: CMOS Signal Interface (CSI) Module Supplementary Information for MC9328MX1 and MC9328MXL Application Note
• Manufacturer: Freescale Semiconductor / Motorola

4.4 (4) Non-Gated Clock Mode, Pixel Clock Falling-Edge Active
5 Statistics
Statistics block computes the Sum of each color component and the Sum Of Absolute Difference (SOAD) of
green. It works on Bayer pattern only.
Sum of color reflects the exposure time; in general longer exposure time results in higher pixel values. The
sums are usually used in the Auto Exposure Control Loop (AEC). On the other hand Sum of Absolute
Difference reflects the sharpness of focus. When the picture is in focus, the value of SOAD should reach the
maximum. It is used in the Auto Focus Control loop in case the optics is mechanically movable by means of
stepping motor.
Statistics is done in a frame-by-frame manner and is initiated by a rising edge on the SOF. This is fixed by
design and cannot be changed. The settings of the SOF_POL bit in the CSI control register 1 has no effect to
the statistics block.
PIXCLK Freq
PIXCLK High Time
PIXCLK Low Time
Data Valid to PIXCLK Low
PIXCLK Low to Data Invalid
VSYNC Valid to PIXCLK Low
PIXCLK Low to VSYNC Invalid
Statistics
8
VSYNC
DATA[7..0]
PIXCLK
Parameter
Tpvd
Freescale Semiconductor, Inc.
For More Information On This Product,
Tdpd (Setup Time)
Tvpd (Setup Time)
Tpdd (Hold Time)
Tpvd (Hold Time)
MC9328MX1/MXL Application Note
Symbol
Tvpd
Engineering Draft / Preliminary
Tph
Tpl
Go to: www.freescale.com
Figure 9.
Table 5.
10.42
10.42
Min
Tdpd
3
2
3
2
0
Tpdd
Typ
-
-
-
-
-
-
-
Max
48
-
-
-
-
-
-
MOTOROLA
Unit
MHz
ns
ns
ns
ns
ns
ns