vT1LH
via_reg(VIA1, vT1LH) = CLK_INTH;
via_reg(VIA2, vT1LH) = (profint - 1) >> 8;
via_reg(VIA2, vT1LH) = 0;
via_reg(VIA1, vT1LH) = 0;
via2_reg(vT1LH) = 0;