[Trac #1315] RTC test report.

[Zarro Boogs per Child]

#1315: RTC test report.
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 Reporter:  chiaying.lin  |       Owner:  mlj      
     Type:  defect        |      Status:  new      
 Priority:  normal        |   Milestone:  Untriaged
Component:  hardware      |    Keywords:           
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 Real Time clock test.[[BR]]
 I prepare three OLPC CL1 B2 motherboard to perform RTC test.[[BR]]
 Flash Insyde BIOS to track RTC time.[[BR]]
 Perform this test for power-on and power-off more than three days.[[BR]]
 Following is test report.[[BR]]
 Power-on three days(Idle,not in Insyde BIOS menu.)[[BR]]

 Machine     perform period                    result.[[BR]]
 OLPC-A     4/3 14:47:30~4/9 09:29:10         slow:11 seconds[[BR]]
 OLPC-B     4/3 14:49:40~4/9 09:27:20         slow:15 seconds[[BR]]
 OLPC-C     4/3 14:51:30~4/9 09:25:20         slow:13 seconds[[BR]]

 Power-off three days[[BR]]
 Machine    perform period                     result.[[BR]]
 OLPC-A    3/29 15:24:30~4/2 9:07:20          slow:4 seconds[[BR]]
 OLPC-B    3/29 15:22:10~4/2 9:05:00          slow:8 seconds[[BR]]
 OLPC-C    3/29 15:18:10~4/2 9:02:10          slow:6 seconds[[BR]]

 Time delta                              : A (sec)         [[BR]]
 Power ON hours                          : X (hours)       [[BR]]
 Time delta                              : B (sec)[[BR]]
 Power OFF hours                         : Y (hours)  [[BR]]
 Power ON hours per year                 : C (hours)[[BR]]
        Suppose the power on time is 1/3 of the year.(
 C=8766/3=2922)}[[BR]]
 Power OFF hours per year                : 8766 - C (hours)[[BR]]
 Total Time Delta (sec)                  = (A/X) x C + (B/Y) x (8766 -
 C)[[BR]]
 RTC Spec (sec)                          = + or - 240[[BR]]
 If the following condition is satisfied, it meets the product
 specifications.[[BR]]
               -240 < Total Time Delta < +240[[BR]]
 OLPC-A                             [[BR]]
 Total time delta= -492.3612        [[BR]]
 OLPC-B                                 [[BR]]
 Total time delta= -832.5007          [[BR]]
 OLPC=C                        [[BR]]
 Total time delta= -664.6428         [[BR]]
 It is out of spec.             [[BR]]

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Ticket URL: <http://dev.laptop.org/ticket/1315>
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