TMS320DM6446_07 Datasheet, PDF (165/231 Pages) Texas Instruments – Digital Media System-on-Chip

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TMS320DM6446
Digital Media System-on-Chip
SPRS283E – DECEMBER 2005 – REVISED MARCH 2007
The AE/AWB Engine accumulates the values and checks for saturated values in a sub sampling of the
video data. In the case of the AE/AWB, the two-dimensional block of data is referred to as a “window”.
The number, dimensions, and starting position of the AF paxels and the AE/AWB windows are separately
programmable.
The H3A register memory mapping is shown in Table 6-51.
Table 6-51. H3A Register Descriptions
HEX ADDRESS RANGE
REGISTER ACRONYM
0x01C7 1400
PID
0x01C7 1404
PCR
0x01C7 1408
AFPAX1
0x01C7 140C
AFPAX2
0x01C7 1410
AFPAXSTART
0x01C7 1414
AFIIRSH
0x01C7 1418
AFBUFST
0x01C7 141C
AFCOEF010
0x01C7 1420
AFCOEF032
0x01C7 1424
AFCOEFF054
0x01C7 1428
AFCOEFF076
0x01C7 142C
AFCOEFF098
0x01C7 1430
AFCOEFF0010
0x01C7 1434
AFCOEF110
0x01C7 1438
AFCOEF132
0x01C7 143C
AFCOEFF154
0x01C7 1440
AFCOEFF176
0x01C7 1444
AFCOEFF198
0x01C7 1448
AFCOEFF1010
0x01C7 144C
AEWWIN1
0x01C7 1450
AEWINSTART
0x01C7 1454
AEWINBLK
0x01C7 1458
AEWSUBWIN
0x01C7 145C
AEWBUFST
DESCRIPTION
Peripheral Revision and Class Information
Peripheral Control Register
Setup for the AF Engine Paxel Configuration
Setup for the AF Engine Paxel Configuration
Start Position for AF Engine Paxels
Start Position for IIRSH
SDRAM/DDRAM Start Address for AF Engine
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 0
IIR Filter Coefficient Data for SET 1
IIR Filter Coefficient Data for SET 1
IIR Filter Coefficient Data for SET 1
IIR Filter Coefficient Data for SET 1
IIR Filter Coefficient Data for SET 1
IIR Filter Coefficient Data for SET 1
Configuration for AE/AWB Windows
Start Position for AE/AWB Windows
Start Position and Height for Black Line of AE/AWB Windows
Configuration for Subsample Data in AE/AWB Window
SDRAM/DDRAM Start Address for AE/AWB Engine
6.13.1.4.1 Auto Focus (AF) Engine
The following features are supported by the Auto Focus (AF) Engine.
• Peak Mode in a Paxel (a Paxel is defined as a two dimensional block of pixels).
• Accumulate the maximum Focus Value of each line in a Paxel
• Accumulation/Sum Mode (instead of Peak mode).
• Accumulate Focus Value in a Paxel.
• Up to 36 Paxels in the horizontal direction and up to 128 Paxels in the vertical direction.
• Programmable width and height for the Paxel. All paxels in the frame will be of same size.
• Programmable red, green, and blue position within a 2x2 matrix.
• Separate horizontal start for paxel and filtering.
• Programmable vertical line increments within a paxel.
• Parallel IIR filters configured in a dual-biquad configuration with individual coefficients (2 filters with 11
coefficients each). The filters are intended to compute the sharpness/peaks in the frame to focus on.
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Peripheral and Electrical Specifications 165