Programming Boards for VersaClock 7 Programmable Clock

AI-generated Summary: Internal capacitance within the VersaClock® 7 (VC7) device is configured using Renesas IC Toolbox software (RICBox). Load capacitance on the crystal is calculated by considering internal stray capacitance (fixed at 8.2pF), external stray capacitance from PCB traces, and adjustable trimming capacitance. The trimming capacitance can be set in 0.42pF steps from 0 to 26.46pF. Bench setup for trimming involves using evaluation boards (RC21008/RC21012 EVBs), frequency counters, and RICBox software to measure and adjust the crystal frequency by tuning load capacitance. The document details step-by-step procedures for hardware setup, software configuration, and frequency measurement to optimize crystal trimming for accurate oscillator performance.