PEDL87V21071-01
OKI Semiconductor
ML87V21071
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Effective area signal
The effective area signal is created from a synthesis of the vertical valid blanking signal (vertical valid data
period: 1, vertical blanking period: 0) and the horizontal reference signal (horizontal valid data period: 1,
horizontal blanking period: 0). It is output as a signal with valid data period: 1, blanking period: 0.
Horizontal Reference Signal
Blanking Period
Valid data period
Figure F3-1 (3) Effective Area
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Field pulse signal
Normally, the field pulse signal detected from the IVS and IHS phases is output.
While R656I=1 is set, an F signal that complies with ITU-R BT.656 is output.
3.2 OVS, OHS, and HREF Pin Output Polarity Setting
The polarity of a group of Sync. signals that are output from the pins OVS, OHS, and HREF can be inverted by
setting the I2C-bus setting registers OVSINV (SUB:61h-bit[0]), OHSINV (SUB:61h-bit[1]), and HREFINV
(SUB:61h-bit[2]).
Table F3-2(1) OVS Pin Polarity
OVSINV
OVS output
0
1
Input same polarity
Input opposite polarity
Table F3-2(2) OVS Pin Polarity
OHSINV
OHS output
0
1
Input same polarity
Input opposite polarity
Table F3-2(3) HREF Pin Polarity
HREFINV
HREF output
0
Internally generated same
polarity
1
Internally generated opposite
polarity
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