SHA_IER
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);
case SHA_IER:
atmel_sha_write(dd, SHA_IER, SHA_INT_TXBUFE);
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);