ASX340AT_16 Datasheet, PDF (30/54 Pages) ON Semiconductor – 1/4‐inch Color CMOS NTSC/PAL Digital Image SOC

Flash
Bitmaps − compressed
ASX340AT
Overlay buffers: 2KB each
Off-screen
buffer
Decompress
Blend and Overlay
NOTE: These images are not actually rendered, but show conceptual objects and object blending.
Figure 28. Overlay Data Flow
NVM PARTITION
The contents of the Flash/EEPROM memory partition
logically into three blocks (see Figure 24):
• 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, extensions reside in this block of
memory
These blocks are not necessarily contiguous.
Flash
Partitioning
Fixed−size
Overlays − RLE _E
Fixed−size
Overlays − RLE
E
1122−bByyteteHHeaedaedrer
OOvevrelarylaDyata
Data
Lens Shading
Correction
Parameter
AltAerlnteartneaRteeg.
Register Setting
SoftwSa/Wre ^PPaattcchh
RRLLEEEEncnocdoedd ed
Data
2kKBByte
Figure 29. Memory Partitioning
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