7.1 Hardware Setup Using Curiosity Nano Evaluation Kit

The necessary connections between the PIC18F57Q43 Curiosity Nano board and the required click boards are shown in Figure 7-1. The full system setup is shown in Figure 7-7.

• The Click 1 expansion connects to the Mic Click Board™. This uses the AN1 pin to transfer analog voice signal to the ADC on-board the PIC18F57Q43. The Mic Click Board™ has a signal conditioning and filtering circuit on board.
• The Click 2 expansion connects to the Flash 2 Click Board™. This board has the SST26VF064B Flash memory module by Microchip and uses SPI to communicate with the microcontroller.
• The Click 3 expansion connects to a custom-made Class D power amplifier circuit on a PROTO Click Board™. An additional circuitry is included to support audio input from a headphone mic attached to the 3.5 mm audio connector.