PLLCON1
pllcon1 = itd1000_read_reg(state, PLLCON1) & 0x7f;
itd1000_write_reg(state, PLLCON1, pllcon1 | (1 << 7));
itd1000_write_reg(state, PLLCON1, pllcon1);
{ PLLCON1, 0x65 }, /* Register does not change */