FEXTNVM6_REQ_PLL_CLK
& ~FEXTNVM6_REQ_PLL_CLK);
CSR_WRITE(sc, WMREG_FEXTNVM6, fextnvm6 | FEXTNVM6_REQ_PLL_CLK);
fextnvm6 &= ~FEXTNVM6_REQ_PLL_CLK;