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ST72734 Fiches technique(PDF) 60 Page - STMicroelectronics

No de pièce ST72734
Description  8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
PDF  144 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72734 Fiches technique(HTML) 60 Page - STMicroelectronics

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Figure 41. Moire Output (instead of Clamping Output)
4.4.5.1 Blanking output signal
The Video Blanking function uses VSYNCO,
HFBACK,
VFBACK
as
input
signals
and
BLANKOUT output as Video Blanking Output. This
output pin is a 5V open-drain output and can be
AND-wired with any external video blanking signal.
Note: HFBACK, VFBACK, VSYNCO signals must have
positive polarity.
To use the video blanking signal:
– Program the polarity:
BLKINV bit in POLR register
– Enable the BLANKOUT output:
BLKEN bit in ENR register
Figure 42. Video Blanking Stage Simplified Schematic
HFBACK
Moire
VFBACK
BLANKOUT
BLKEN
HFBACK
VFBACK
VSYNCO
To Edge detector (LATR)
R
S
To Edge detector (LATR)
BLKINV



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