Datasheet

PDF: 09005aef8202ec2e/Source: 09005aef8202ebf7 Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT9D111__4_REV5.fm - Rev. B 2/06 EN
58 ©2004 Micron Technology, Inc. All rights reserved.
MT9D111 - 1/3.2-Inch 2-Megapixel SOC Digital Image Sensor
IFP Registers, Page 2
Micron Confidential and Proprietary
75
0x4B
15:0 0x028
AF Filter 1 Coefficients
3:0 1
C1.
7:4 0
C2.
11:8 0
C3.
15:12 0
C4.
This register specifies coefficient pairs for horizontal filter 1. Coefficient pairs C1 - C4 and center coefficient C0
define the filter kernel. Filter tap order is C4, C3, C2, C1, C0,C 1, C2, C3, C4 for odd-length configuration and C4,
C3, C2, C1, C1, C2, C3, C4 for even-sized. R76:2[5] controls filter symmetry. When “0” filter the even-length
configuration becomes C4, C3, C2, C1, -C1, -C2, -C3, -C4. The filter input is linear luminance from interpolation.
Filter coefficients are specified as unsigned 4-bit numbers, 0..15. Their signs are specified in R76:2.
76
0x4C
15:0 0xC0B0
AF Filter 1 Configuration
3:0 0
Scale factor 0- 1; 1- /2; 2- /4; 3- /8; 4- /16; 5- /32; 6- /64; 7- /128; 8- /256; 9- /512; 11- *2; 12- *4;
13- *8; 14- *16; 15- *32.
41
1 = odd length (9 taps); 0 = even length (8 taps, C0 ignored).
51
If “1” filter is symmetric else anti-symmetric.
10:6 0
Signs for filter coefficients C4(10):C0(6). 1 = negative, 0 = positive.
15:12 0
C0 coefficient, for the center tap in odd-sized filter.
If filter coefficients larger than 1, the user must use appropriate scale factor to avoid overflow. For example, use
scale factor /2 for filter 0 0 0 2 -2 0 0 0.
77
0x4D
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W12 and W11
7:0
Average sharpness in W11 (top left).
15:8
Average sharpness in W12.
78
0x4E
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W14 and W13
7:0
Average sharpness in W13.
15:8
Average sharpness in W14 (top right).
79
0x4F
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W22 and W21
7:0
Average sharpness in W21.
15:8
Average sharpness in W22.
80
0x50
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W24 and W23
7:0
Average sharpness in W23.
15:8
Average sharpness in W24.
81
0x51
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W32 and W31
7:0
Average sharpness in W31.
15:8
Average sharpness in W32.
82
0x52
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W34 and W33
7:0
Average sharpness in W33.
15:8
Average sharpness in W34.
83
0x53
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W42 and W41
7:0
Average sharpness in W41 (bottom left).
15:8
Average sharpness in W42.
84
0x54
15:0 R/O
AF Filter 1 Average Sharpness Measure for AF Windows W44 and W43
7:0
Average sharpness in W43.
15:8
Average sharpness in W44 (bottom right).
Table 7: IFP Registers, Page 2 (continued)
Reg # Bits Default Name