Re: Help:Video Transcoder, LMH1251, possible ground problem???


POWER SAVE MODE
The LMH1251 is equipped with a power saving mode which
is controlled by Pin 21. This pin is a logic level input. The de-
vice will enter a low power mode when the power save pin is
applied with a logic high by the MCU. Under these conditions,
the IC reduces its current consumption to a minimum as spec-
ified in the Electrical Characteristics section. However, the
sync processor and switch will always remain active. During
power save mode, the RGB video outputs are held to the
blank level, while the sync signals are allowed to continue to
be processed and/or passed through. Based on the absence
or presence of sync signals at the output of the LMH1251, the
MCU can determine whether to bring the system to a low
power consumption state.



I have thought of this, but I left that pin floating so that feature is
disabled. I was wondering if it needed to be grounded though for a logic
low, instead of just left floating...


.

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