M41ST84_REG_CSEC
for (i = M41ST84_REG_CSEC; i < M41ST84_REG_DATE_BYTES; i++) {
bcd[M41ST84_REG_CSEC] = bintobcd(0); /* must always write as 0 */
cmdbuf[0] = M41ST84_REG_CSEC;
bcd[M41ST84_REG_CSEC] = 0; /* must always write as 0 */
cmdbuf[0] = M41ST84_REG_CSEC;