msm7654 Oki Semiconductor, msm7654 Datasheet - Page 18

• Manufacturer Part Number: msm7654
• Description: Ntsc/pal Digital Video Encoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Valid Data Range
According to the ITU-R BT.656 standard, the pixel data immediately from SAV (4th word) to a
fixed value before EVA is valid.
The following figure shows the relationship between the input data at the ITU-R BT.656 format
and the sync, luminance, chrominance signals which are processed inside the encoder.
Note) The values in parenthesis indicate values in PAL mode.
ITU-R BT.656 standard input data
Sync signal VSYNC_L (0H)
generated by input signal
Sync signal VSYNC_L (1/2H)
generated by input signal
Sync signal HSYNC_L generated
by input data
Sync signal BLANK_L generated
by input data
Luminance signal separated from
input data
Chrominance signal separated
from input data
Composite signal
Relationship between input data and sync signal, luminance signal, chrominance signals
9T CLKX1 (16T CLKX1 )
4T CLKX2
11T CLKX1 (4T CLKX1 )
63T CLKX1 (63T CLKX1 )
136T CLKX1 (146T CLKX1 )
127T CLKX1 (142T CLKX1 )
8'h10
8'h80
1716T CLKX2 (NTSC)/1728T CLKX2 (PAL)
4T CLKX2
Cb0, Y00, Cr0, Y01, Cb1, Y10, Cr1, Y11....
Y00
Cb0
4T CLKX1
(4T CLKX1 )
1H
Y01 Y10 Y11
Cr0 Cb1 Cr1
144T CLKX2 (NTSC/PAL)
711T CLKX1 (702T CLKX1 )
1/2H
20T CLKX1 (20T CLKX1 )
MSM7654
8'h10
8'h80
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