MK_CSR
chiptime[MK_CSR] |= (MK_CSR_READ << 24);
chiptime[MK_CSR] &= (~MK_CSR_READ << 24); /* time wears on */
chiptime[MK_CSR] |= (MK_CSR_WRITE << 24); /* enable write */
chiptime[MK_CSR] &= (~MK_CSR_WRITE << 24); /* load them up */
mclock[MK_CSR] |= MK_CSR_READ << 24;
mclock[MK_CSR] &= ~(MK_CSR_READ << 24);