pub const INIT: u8 = 0x00;
pub const PRINT_STATUS: u8 = 0x01;
pub const PRBS: u8 = 0x02;
pub const STPL: u8 = 0x03;
pub const SYSREF_DELAY_DAC: u8 = 0x10;
pub const SYSREF_SLIP: u8 = 0x11;
pub const SYNC: u8 = 0x12;