LM9801CCV NSC [National Semiconductor], LM9801CCV Datasheet - Page 32

• Manufacturer Part Number: LM9801CCV
• Description: Greyscale/24-Bit Color Linear CCD Sensor Processor
• Manufacturer: NSC [National Semiconductor]

Applications Information
(Continued)
Figure 25 shows a different technique for increasing the TR-
1 guardband and or increasing the length of the TR pulse
by stopping the s MCLK during the TR period When TR
initially goes high the first one-shot (U1A) triggers effec-
tively disabling the LM9801’s MCLK for
2
s thereby
lengthening the TR pulse width by
2
s over the value
programmed in the configuration register On the falling
edge of TR the second one-shot (U1B) fires disabling the
LM9801’s MCLK for
1
s and increasing the TR- 1
guardband by that amount
TL H 12814 – 52
FIGURE 25 Stretching TR and the TR- 1 Guardband
32
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