msm7664 Oki Semiconductor, msm7664 Datasheet - Page 28

• Manufacturer Part Number: msm7664
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
A/D Converter Support Signal
The waveform of the HSY signal, shown below, provides clamp timing to the A/D converter
when HSY clamp (digital clamp) is selected. The start and end edges of the clamp pulse have a
variable range from the sync tip to the pedestal position. (HSY is an internal signal.)
Output Timing
• ITU-RBT.656 output
During the blanking interval, data is output with the Y value.
Note:
CVBS
BURST
HSY
Digital line 1716T (NTSC, 525) and 1728T (PAL, 625) are not maintained at the next line.
Digital active line 1440T of the line immediately after VVALID falls and the 10th or 11th
line after VSYNC_L rises will fluctuate due to pixel compensation. Especially when a
non-standard signal is input, the line immediately after VVALID falls will fluctuate
largely due to instability of the input signal. Due to phenomena such as an increase in
the number of lines for a standard signal and a decrease in the number of lines for a non-
standard signal, it may not be possible to guarantee correct EAV and SAV functionality.
ITU-RBT.656 Output (Data in one line in which video data presents)
4T
Digital line blanking
276T (NTSC, 525)
288T (PAL, 625)
Digital line {1716T (NTSC, 525), 1728T (PAL, 625)}
T
SAV
EAV
sync tip
A/D Converter Support Signal
: clock periods 37 ns normal (1/27 MHz)
: start of active video timing reference code
: end of active video timing reference code
Multiplexed video data
Cb0 Y00 Cr0 Cb1 Y10 Cr1 Y11
4T
Video data block (1440T)
Digital active line
COLOR
BURST
Pedestal
PEDL7664-01
MSM7664
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