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CHRONTEL
CH5101A
201-0000-033 Rev 1.0, 6/2/99
19
Bits 1 through 3 of the MOF register along with ELFA, bit 6 select the mode that the IC operates according to the
table below. A listing of ‘FR’ in a column indicates that the frame rate is adjusted through varying this parameter,
and the table under the Frame Rate register should be used to determine this value. When mode 4 or 5 is selected,
the value of the FR register is ignored, and the IC will output a frame rate compatible with the field rate of NTSC or
PAL. An integer number of lines will be output in each frame, with the odd frames having one line more than the
even frames.
Bits 4, 5 and 7 ‘CHL’ ‘CVL’ ‘CIF2’ of the MOF register specify the chrominance sample location with respect to
the luminance samples in the horizontal and vertical directions respectfully. When CHL is 0, chrominance samples
are located between the luminance samples in the horizontal direction. When CHL is 1, chrominance samples are
aligned with alternate luminance samples. When CIF2 is 0 and CVL is 0, chrominance samples are located between
the luminance samples in the vertical direction. When CIF2 is 0 and CVL is 1, chrominance samples are aligned
with alternate luminance samples. When M[2:0] is set to mode 4 or 5, the CHL and CVL bits are ignored. When the
CIF2 bit is high, the CVL bit is ignored, and the chrominance signal is output on every line that has luminance.
Line
CLKOUT
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
1
Y[7:0]
1
2
8
Y
0
1
2
8
Y
0
i
1
2
8
Y
1
1
2
8
Y
1
i
1
2
8
Y
2
1
2
8
Y
2
i
1
2
8
Y
3
1
2
8
Y
3
i
1
2
8
Y
4
1
2
8
Y
4
i
1
2
8
Y
5
1
2
8
Y
5
i
Table 7. Operating Modes
ELFA
M
2
M
1
M
0
Operating
Mode
Y
Active
Pixels
/Line
352
Y
Active
Lines
CrCb
Active
Pixels
/Line
176
CrCb
Active
Lines
Total
MCLK
/ Line
Total
Lines/
Frame
Functional Description
0
0
0
1
CIF
288
144
1716
FR
CIF
Progressive scan
QSIF
Progressive scan
525 Line scan 4:2:2
0
0
1
1
QCIF
176
144
88
72
1716
FR
x
1
0
0
CCIR601
NTSC
CCIR601
PAL
Reserved
Reserved
CIF 2
704
240
352
240
1716
263/262
x
1
0
1
704
288
704
288
1728
313/312
625 Line Scan 4:2:2
x
x
1
1
1
0
1
1
0
0
1
1
352
288
176
144
FR
289
CIF-289
Progressive scan
QSIF-298
Progressive scan
1
0
1
1
QCIF 2
176
144
88
72
FR
289