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2.2.12 Dedicated V
/GND signals
DD
Signal name
VDD_PLL
GND_PLL
VDD_TP
GND_TP
VDD_AD
GND_AD
VDD_OSC
GND_OSC
VDD_LOGIC
GND_LOGIC
VDD_IO
GND_IO
Caution The V
4181 has two types of power supplies. The 3.3 V power supply should be turned on at first.
R
Turn on/off the 2.5 V power supply depending on the status of the MPOWER pin.
CHAPTER 2 PIN FUNCTIONS
Power
supply
2.5 V
Power supply dedicated for the PLL analog block.
2.5 V
Ground dedicated for the PLL analog block.
3.3 V
Power supply dedicated for the touch panel interface.
3.3 V
Ground dedicated for the touch panel interface.
3.3 V
Power supply dedicated for the A/D and D/A converters. The voltage applied to this
pin becomes the maximum value for the A/D and D/A interface signals.
3.3 V
Ground dedicated for the A/D and D/A converters. The voltage applied to this pin
becomes the minimum value for the A/D and D/A interface signals.
3.3 V
Power supply dedicated for the oscillator.
3.3 V
Ground dedicated for the oscillator.
2.5 V
Ordinary power supply of 2.5 V
2.5 V
Ordinary ground of 2.5 V
3.3 V
Ordinary power supply of 3.3 V
3.3 V
Ordinary ground of 3.3 V
User's Manual U14272EJ3V0UM
Description of function
59
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