2.1 Basic Connection Requirements

Getting started with the PIC32CZ CA80/CA9x Family of 32-bit Microcontrollers (MCUs) requires attention to a minimal set of device pin connections before proceeding with development. The following is a list of pin names, which must be connected always:

• All VDDIO and VSS pins (see Decoupling Capacitors)
• All AVDD and AVSS pins, even if the ADC module is not used (see Decoupling Capacitors)
• RESET pin (see External RESET Pin)
• SWDIO, SWO, SWCLK pins, used for In-Circuit Programming and debugging purposes (see Debug/Programming Pins)
• XIN and XOUT pins, when external oscillator source is used (see External Oscillator Pins)

The following pins may be required:

• ADC_VREFH pin, used when external voltage reference for the ADC module is implemented
• USBRBIAS0 and USBRBIA1 when corresponding USBx is used
• TDI, TMS,TDO and TCK if JTAG is used