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17200 | Product still starts with very low mains input
ProjectOther - SAM4 - NP800 Platform
SeverityMedium Impact
Workflow StepNew Issue
Date Found3/13/2017
Date Fixed
Reported ByGary Crocker
Changed ByGary Crocker
Assigned ToSteve Simon
Hardware versionR1
Software version13288
Mechanical drawing
Fixed in Version
DescriptionA 230V Atom connected to low mains will still boot
Arm boot log with 134V mains input:

normal start
App start

STDIO up
******************************************************
NAIM Embedded SAM4 Micro Kernel
NP800 codebase - (C) Naim Audio Limited 2015-2017
Config V1.13
Hardware type 4 (Naim-Atom), rev R1
Daughter boards:
        Analogue: rev R1
        Top UI: rev R2
        Logo: rev R2
        Keyboard: rev R1
        Display: type 1
Transformer type: 220

Product History:
        Product serial number: 881011
        Product date of birth: 041016_165351
        Date stamp of last service:

CPU clock 96MHz
CHIPID_CIDR:
        Cortex-M4 SAM4E Series v0
        Embedded ram: 128Kb
        NVM Type: Embedded Flash
        NVM1 Size: 1024Kb
        NVM2 Size: None
CHIPID_EXT:
        SAM4E16C  -  100 Pin 1024Kb Flash
CPUID:
        ARM Cortex-M4 v0r1


BSL1 : v1.0.000 (13284)
BSL2 : v1.0.000 (13284)
App  : v0.10.044 (13288)
STDIO to IRQ mode
ram=127Kb flash=895Kb heap=111Kb
     0.108 log argv     'main -d psu'
     0.113 dbg psu      arm_pwr_good=? (state init unsupported)
     0.113 dbg psu      init
     8.114 log wait4rise timeout after 8000 ms, waiting for linearPSU to rise to 160 (it is now 98)
     8.114 dbg psu      cold boot, mains=134v d/dt=134
     8.165 dbg psu      cold boot, mains=134v d/dt=0
     8.165 dbg psu      switch from smps to linear
     8.799 log hdmi     HDMI board present, but cannot ping sil9533 on the i2c bus
     8.801 dbg psu      from main, state=init need=- target=active power state change
     8.801 dbg psu      active
-      9.751 dbg psu      arm_pwr_good=1
Notes
Repro Steps
Resolution

https://ot.naimaudio.com/Axosoft/ViewItem.aspx?type=defects&id=17200