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9. Flow Chart of Troubleshooting
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9-1
9-1. Power On
Check the current consumption
more than 100mA
' Power On ' does not work
Yes
Yes
No
Download again
Check the VBAT
more than 3.3V
No
Check the Battery
Yes
Check the related circuit
No
C300(VBAT) = 3.0V?
Yes
①
Check the
U300
No
Check the MEM_1.8V of U300
is more than 1.8V
1.8V
Yes
Check U300
3.0V_DIG = 3.0V
3.0V_ANLG = 3.0V
1.2V_ANLG = 1.2V
②
No
Check the
U300
and
C352, C319, C333
Yes
③
Yes
Yes
Check the clock
32KHz_DIGIT
No
Check CLK32K
Freq = 32KHz
Check the initial operation
END