MN63Y1208 Datasheet, PDF (17/120 Pages) Panasonic Semiconductor – Built-in 4-Kbit FeRAM non-volatile memory with fast write and low power consumption

Chapter 2 Pin Descriptions
2.3 Connection Example
Figure 2- gives an connection example.
This example shows that the host's GPIO controls the RFID's VDDEX. In this case, when not using serial
communication, turning VDDEX off allows the consumption current of the RFID to be turned off. In addition, it
is also possible to supply a voltage to VDDEX directly from the power supply, not from the host's GPIO.
The SDA(IO) and NIRQ pins are open-drain output. Pull up these pins to the same voltage level as the power
supply of the host.
Figure 2-3 Connection Example
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