Constant avrd::atmega640::enum_sut_cksel::FSOSC_16KCK_4MS1_XOSC_FASTPWR

pub const FSOSC_16KCK_4MS1_XOSC_FASTPWR: u32 = 0x27;

Full Swing Oscillator; Start-up time: 16K CK + 4.1 ms; Crystal Osc.; fast rising power.