Tests and Diagnostics
PORTEGE M780 Maintenance Manual (960-809) [CONFIDENTIAL] 3-183
3.35.6.7 Real timer test
1) Real time
This subtest sets and displays the calendar or clock function.
2) Backup memory
This subtest writes the data for 1bit ON (01, 02, 04…80h) and 1bit OFF (FE, FB, FB…7Fh)
and AAh, 55h to 114 bytes of addresses from 0E to 7Fh, reads the written data and compares
the result with the original data.
3) Real time carry
Set the constant value as below and check carry of the timer.
Month Date Year Hour Min. Sec.
12 - 31 - 2008 23 : 59 : 58
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