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LM2467 Folha de dados(PDF) 17 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM2467
Descrição Electrónicos  150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD ROM, 512 Character RAM and 4 DACs
PDF  43 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2467 Folha de dados(HTML) 17 Page - National Semiconductor (TI)

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Programmable Horizontal Blank
The leading edge position of the internal horizontal blank can
be programmed with respect to the horizontal flyback zero
crossing leading edge in steps of 4 OSD pixels up to a
maximum of 16 steps as shown below in Figure 12. This
start position of the horizontal blanking pulse is only pro-
grammable to occur before the horizontal flyback zero cross-
ing edge, and cannot be programmed in the opposite direc-
tion. The trailing edge of the horizontal blanking pulse is
independent of the programmable leading edge, and its
relativity to the Horizontal flyback trailing edge remains un-
changed. To use this feature, Horizontal Blanking (0x843A[0]
which is enabled by default) and Programmable Horizontal
Blanking (0x843A[2]) must be enabled. The number of steps
is programmed with the bits in 0x843A[6:3]. When this fea-
ture is disabled, please refer to the H-Blank Time Delay - On
specification (+ Zero Crossing of I
HFB to 50% of output
blanking end) listed under the System Interface Signal Char-
acteristic section.
20075752
FIGURE 12. Programmable Internal H. Blank
www.national.com
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