6.2.1 Basic Connection Requirements

The device requires a nominal 3.3V supply voltage. The following pins need to be connected:

  • All VDD and VSS pins need connection to the supply voltage and decoupling capacitors
  • VCORECAP: The devices’ core and digital logic are designed to operate at a nominal 1.8V, which is provided by an on-chip regulator. The required core logic voltage is derived from VDD and is outputted on the VCORECAP pin. A low-ESR capacitor (such as tantalum or ceramic) must be connected to the VCORECAP pin. This helps to maintain the stability of the regulator.
  • AVDD: Analog voltage references for the ADC needs to be connected to the supply voltage and a decoupling capacitor
  • VANA: Analog supply for GestIC analog front end must be connected to the supply voltage
Figure 6-5. Connections for VCORE Regulator
Note:
  1. These are typical operating voltages.
  2. It is important that the low-ESR capacitor is placed as close as possible to the VCAP pin.
  3. The typical voltage on the VCAP is 1.8V.