pub type MODE_W<'a, const O: u8> = BitWriter<'a, u32, MR_SPEC, MODESELECT_A, O>;
Field MODE writer - Master/Slave/Controller Mode
MODE
Slave mode (only serial data handled, clocks received from external master or controller)
Master mode (clocks generated and output by IISC, serial data handled if CR.RXEN and/or CR.TXEN written to 1)