PEF2256_FMR1
pef2256_clrsetbits8(pef2256, PEF2256_FMR1, PEF2256_FMR1_XFS, fmr1);
pef2256_clrsetbits8(pef2256, PEF2256_FMR1, PEF2256_FMR1_SSD_MASK, fmr1);
pef2256_setbits8(pef2256, PEF2256_FMR1, PEF2256_FMR1_ECM);
pef2256_write8(pef2256, PEF2256_FMR1, 0x00);