ADC_CLKDIV
reg = (int)ADC_READ4(sc, ADC_CLKDIV) + 1;
ADC_WRITE4(sc, ADC_CLKDIV, reg);
ADC_WRITE4(sc, ADC_CLKDIV, 24 - 1);
ADC_WRITE4(sc, ADC_CLKDIV, 2400 - 1);