Constant teensy4_bsp::board::PERCLK_FREQUENCY

pub const PERCLK_FREQUENCY: u32 = _; // 1_000_000u32

PERCLK clock frequency (Hz).

This is the PIT timer frequency. It can also be used as the GPT frequency, provided you use the peripheral clock or high-frequency reference clock as the GPT clock selection.

PERCLK runs at 1MHz. It derives from the crystal oscillator.