PEF2256_GCR
pef2256_setbits8(pef2256, PEF2256_GCR, PEF2256_GCR_ECMC);
pef2256_write8(pef2256, PEF2256_GCR, 0x00);
pef2256_setbits8(pef2256, PEF2256_GCR, PEF2256_GCR_SCI);