Datasheet

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MT9D111__6_REV5.fm - Rev. B 2/06 EN
112 ©2004 Micron Technology, Inc. All rights reserved.
MT9D111 - 1/3.2-Inch 2-Megapixel SOC Digital Image Sensor
Output Format and Timing
Micron Confidential and Proprietary
Uncompressed 10-Bit Bypass Output
Raw 10-bit Bayer data from the sensor core can be output in bypass mode in two ways:
1. Using 10 data output pads (D
OUT0–DOUT9), or
2. Using only 8 pads (D
OUT0–DOUT7) and a special 8 + 2 data format, shown in Table 26.
The timing of 10-bit or 8-bit data stream output in the bypass mode is qualitatively the
same as that depicted in Figure 7.
Figure 9: Example of Timing for Non-Decimated Uncompressed Output Bypassing
Output FIFO
JPEG Compressed Output
JPEG compression of IFP output produces a data stream whose structure differs from
that of an uncompressed YUV/RGB stream. Frames are no longer sequences of lines of
constant length. This difference is reflected in the timing of the LINE_VALID signal.
When JPEG compression is enabled, logical HIGHs on LINE_VALID do not correspond
to image lines, but to variably sized packets of valid data. In other words, the
LINE_VALID signal is in fact a DATA_VALID signal. It is a good analogy to compare the
JPEG output of the MT9D111 to an 8-bit parallel data port wherein the LINE_VALID sig-
nal indicates valid data and the FRAME_VALID signal indicates frame timing.
The JPEG compressed data can be output either continuously or in blocks simulating
image lines. The latter output scheme is intended to spoof a standard video pixel port
connected to the MT9D111 and for that purpose treats JPEG entropy-coded segments as
if they were standard video pixels. In the continuous output mode, JPEG output clock
can be free running or gated. In all, three timing modes are available and are depicted in
Figure 10 on page 114, Figure 11 on page 114, and Figure 12 on page 114. These timing
diagrams are merely three typical examples of many variations of JPEG output. Descrip-
tion of output configuration register R13:2 in Table 7, "IFP Registers, Page 2," on page 52
provides more information on different output interface configuration options.
Table 26: 2-Byte RGB Format
Odd bytes 8 data bits D
9
D
8
D
7
D
6
D
5
D
4
D
3
D
2
Even bytes 2 data bits + 6
unused bits
0 0 0 0 0 0 D
1
D
0
0xFF 0x00 0x00 0xAB 0xFF 0x00 0x00 0x80 Cb
0
Y
0
Cr
0
Y
1
Cb
0
Y
0
Cr
0
Y
1
0xFF 0x00 0x00 0x9D 0xFF 0x00 0x00 0xB6