Camera Isp Circular Buffer Fragmentation Support Physical Window Addresses; Camera Isp Circular Buffer Vrfb Maximum Supported Frame Size; Camera Isp Circular Buffer Vrfb Extended Supported Frame Size - Texas Instruments OMAP36 Series Technical Reference Manual

www.ti.com
Table 6-49. Camera ISP Circular Buffer Fragmentation Support Physical Window Addresses
Physical Window
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
6.4.10.3.1.4 Camera ISP Circular Buffer VRFB Context Grouping
The VRFB is part of the SMS module and provides support for image rotation by writing the data into
SDRAM and reading it back. The VRFB can rotate frames of up to 2k * 2k pixels per context. That is
sufficient to rotate the following image sizes
Table 6-50. Camera ISP Circular Buffer VRFB Maximum Supported Frame Size
Frame size
3.1 Mega Pixel
2.8 Mega Pixel
2.3 Mega Pixel
The CBUFF module can optionally perform address translation to group 4 contexts together. This extends
the maximum frame size than can be rotated to the following:
Table 6-51. Camera ISP Circular Buffer VRFB Extended Supported Frame Size
Frame size
12.5 Mega Pixel
11.1 Mega Pixel
9.4 Mega Pixel
NOTE: VRFB context grouping is a standalone feature. It cannot be combined with circular
buffering or fragmentation.
The VRFB supports a total of 12 contexts. The CBUFF VRFB context grouping feature groups 4 contexts
together to provide a larger virtual frame buffer. CBUFF can handle up to 3 groups or 4 VRFB contexts
each.
The software chooses which VRFB contexts to use by defining the base address of the 1st of the 4
contexts using the CBUFF_VRFB_CTRL.BASEx register (x = 0, 1, or 2). Software must ensure that
translated regions do not overlap.
Software also needs to define the data width (8, 16, or 32-bits) and the orientation (0, 90, 180, or 270
degrees) using the CBUFF_VRFB_CTRL.WIDTHx and CBUFF_VRFB_CTRL.ORIENTATIONx registers.
SWPU177N – December 2009 – Revised November 2010
Public Version
Fragmentation ON Register
CBUFF0_ADDR0
CBUFF0_ADDR1
CBUFF0_ADDR2
CBUFF0_ADDR3
CBUFF0_ADDR4
CBUFF0_ADDR5
CBUFF0_ADDR6
CBUFF0_ADDR7
CBUFF0_ADDR8
CBUFF0_ADDR9
CBUFF0_ADDR10
CBUFF0_ADDR11
CBUFF0_ADDR12
CBUFF0_ADDR13
CBUFF0_ADDR14
CBUFF0_ADDR15
Aspect ratio
4/3
3/2
16/9
Aspect ratio
4/3
3/2
16/9
Copyright © 2009–2010, Texas Instruments Incorporated
Camera ISP Functional Description
Camera Image Signal Processor
1239