YGV628B Datasheet, PDF (10/26 Pages) YAMAHA CORPORATION – AVDP7 Advanced Video Display Processor 7

YGV628B






■ Pins Functions
AVDP7 operates with a 3.3V power supply. Therefore, input and output of the interface to the peripheral circuits
operates at LVTTL (3.3v)except RESET_N pin. However, the tolerant voltage to Input/Output signals are
guaranteed up to 5V, therefore, connection to a 5V TLL level compatible device is also possible.
Please use a register separately for each pin when making pull-up or pull-down of I/O pins outside of the device.
However, when an input signal is fixed by pull-up or pull-down resistor, a common resistor can be used for these
input pins.
1) Power Supply
AVDP7 is the 3.3V single power supply specification. In addition, exclusive analog power supply pins are prepared
for the built-in PLL and the built-in DAC respectively.
Be sure to observe the following instructions when performing power-on and power-off.
● Simultaneous power-on and power-off is the rule.
● When a time difference occurs due to the design, please follow the following order of power-on and power-off.
● Please perform power-on and power-off so that PLLVDD does not become higher than VDD.
The order of power-on and power-off.
● At the time of power-on.
VDD(Digital power supply)ÆPLLVDD(Analog power supply for PLL)ÆDACVDD(Analog power supply for DAC) ÆSignals.
● At the time of power-off
SignalsÆDACVDD(Analog power supply for DAC)ÆPLLVDD(Analog power supply for PLL)ÆVDD(Digital power supply).
When power-on and power-off are performed in reverse order against a recommended procedure in two kinds of
power supplies in any of the power supplies mentioned above, a problem might be occurred to have an influence on the
reliability of LSI. For the reason, please avoid such operations.
● VDD (Power Supply Pin No.5, 19, 34,46, 58, 69, 79, 90, 101, 108, 120, 132, 145, 158, 170)
● VSS (Power Supply Pin No.7, 20, 32, 43, 53, 61, 67, 74, 81, 87, 97, 106, 117, 127, 148, 160, 171)
 Power Supply Pin for Internal Digital Circuit.
 Please supply 3.3V to VDD pins, and supply a ground level to VSS pin.
● PLLVDD (Power Supply Pin No.174)
● PLLVSS (Power Supply Pin No.175)
 It is an analog power supply pin for built-in PLL.
 Please supply a ground level to PLLVSS pins, and supply 3.3V to PLLVDD.
 Be sure to perform power supply power-on and power-off, so that PLLVDD may not become higher
than VDD.
● DACVDD (Power Supply Pin No.138)
● DACVSS (Power Supply Pin No.133)
 It is an analog power supply pin for built-in DAC.
 Please supply 3.3V to DACVDD pin, and supply a ground level to DACVSS pin. Be sure to supply
separately to other power supplies.
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