YGV627 Datasheet, PDF (12/16 Pages) YAMAHA CORPORATION – AVDP3E - Advanced Video Display processor 3 Enhanced

YGV627
<Other pins>
q _TEST2-0 ( I: Pull Up )
These pins are used for testing internal circuit of YGV627.
Be sure to keep them open (without connecting any component) when using the device.
q AVDD1, AVSS1 ( I )
These pins supply power to VCO analog circuit that generates SDRAM clock. Connect +3.3 V to AVDD1 and
ground level to AVSS1.
q AVDD2, AVSS2 ( I )
These pins supply power to VCO analog circuit that generates dot clock. Connect +3.3 V to AVDD2 and ground level
to AVSS2.
q AVDD3, AVSS3 ( I )
These pins supply power to analog circuit of RGB DAC section. Connect +3.3 V to AVDD3 and ground level to
AVSS3.
q VDD, VSS ( I )
These pins supply power to digital circuit of YGV627. Connect +3.3 V to VDD and ground level to VSS. YGV627
has several VDD and VSS, all of which require power supply. Connect a bypass capacitor between VDD and VSS as
a noise killer as close as possible to the pins.
Power supplies, VDD, AVDD1, AVDD2 and AVDD3 are to be turned on at the same time, in principle. Turning on
the power supplies at the same time means that they are to be turned on before the potential difference between them
reaches and exceeds 0.6 V. Avoid making the potential difference 0.6 V or over continuously (over approximately one
second), or the reliability of this LSI may be deteriorated. If the potential difference among the power supplies cannot
be avoided, be sure to turn on/off VDD, AVDD1, AVDD2 and AVDD3 so that their voltages do not exceed VDD.
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