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ASX340 датащи(PDF) 46 Page - List of Unclassifed Manufacturers

номер детали ASX340
подробное описание детали  1/4-Inch Color NTSC/PAL Digital Image SOC with Overlay Processor
PDF  78 Pages
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производитель  ETC2 [List of Unclassifed Manufacturers]
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ASX340 датащи(HTML) 46 Page - List of Unclassifed Manufacturers

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PDF: 171981479/Source: 8304342517
Aptina reserves the right to change products or specifications without notice.
ASX340/MT9V139_DS Rev. C Pub. 3/11 EN
46
© 2010 Aptina Imaging Corporation All rights reserved.
ASX340/MT9V139: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor
Serial Memory Partition
Aptina Confidential and Proprietary
Preliminary
Serial Memory Partition
The contents of the Flash/EEPROM memory partition logically into three blocks (see
Figure 28):
• Memory for overlay data and descriptors
• Memory for register settings, which may be loaded at boot-up
• Firmware extensions or software patches; in addition to the on-chip firmware, exten-
sions reside in this block of memory
These blocks are not necessarily contiguous.
Figure 28:
Memory Partitioning
External Memory Speed Requirement
For a 2KB block of overlay to be transferred within a frame time to achieve maximum
update rate, the serial memory has to be a certain speed.
Table 26:
Transfer Time Estimate
Frame Time
SPI Clock
Transfer Time to 2KB
33.3ms
4.5 MHz
1ms
S/W Patch
Alternate Reg.
Setting
Overlay Data
Flash
Partitioning
Fixed Size
Overlays-RLE
12Byte Header
RLE Encoded
Data
2kByte
Fixed Size
Overlays-RLE
Lens Correction
Parameter
Fixed-size
Overlays – RLE
Fixed-size
Overlays – RLE
Flash
Partitioning
Overlay
Data
Software Patch
12-byte Header
RLE Encoded
Data
2KB
Lens Shading
Correction
Parameter
Alternate
Register Setting



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