Barracuda PDA Maintenance
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1.2.5 Battery Fault
There are two kind of battery fault events which can force the system shutdown to prevent data lose .
1.2.5.1 Battery capacity low
While battery capacity below 3.4V , the hardware comparator will assert signal
BAT_FAULT_IRQ#
to interrupt
CPU to save data to SDRAM and execute SDRAM self-refresh command , then assert
BAT_FAULT_EN
to enable
Hardware Battery Fault mechanism (SA1110 ) which force system shutdown .
1.2.5.2 Battery cover lose
Since Capricorn battery is swappable , user has the way to access battery . The battery mechanical cover must be
monitored to ensure Capricorn battery is connected well without battery dropout problem . while battery cover be
removed , that will release one switch button and cause the signal
BAT_FAULT_IRQ#
be active , then the routine
will be the same as battery capacity low event .
Summary of Contents for Barracuda
Page 5: ...Barracuda PDA Maintenance 4 Block Diagram ...
Page 6: ...Barracuda PDA Maintenance 5 Power Block Diagram ...
Page 18: ...Barracuda PDA Maintenance 17 Typical Audio Amplifier Application Circuit ...
Page 24: ...Barracuda PDA Maintenance 23 Block diagram of the 10 bit ADC circuit ...
Page 26: ...Barracuda PDA Maintenance 25 BLOCK DIAGRAM ...
Page 28: ...Barracuda PDA Maintenance 27 Block Diagram ...
Page 30: ...Barracuda PDA Maintenance 29 GENERAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ...
Page 33: ...Barracuda PDA Maintenance 32 ...
Page 42: ...Barracuda PDA Maintenance 41 ...
Page 43: ...Barracuda PDA Maintenance 42 ...
Page 45: ...Barracuda PDA Maintenance 44 FUNCTIONAL BLOCK DIAGRAM ...
Page 47: ...Barracuda PDA Maintenance 46 Strata Flash Memory Block Diagram ...
Page 54: ...Barracuda PDA Maintenance 53 DS2760 Block Diagram ...
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