Microprocessor power management with
Watchdog Timer
NO. EA-071-0204
5ꢀꢁꢂꢁ*ꢃ6(5,(6
OUTLINE
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7KHꢀ EXLOWꢄLQꢀYROWDJHꢀUHJXODWRUꢀZLWKꢀ DQꢀ LQWHUQDOꢀ GULYHUꢀ WUDQVLVWRUꢀ FDQꢀ VXSSO\ꢀ W\SLFDOO\ꢀ ꢁꢃP$ꢀ FXUUHQWꢀ WRꢀ Dꢀ V\VWHP
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VXSSO\ꢀV\VWHPVꢀIRUꢀPLFURSURFHVVRUVꢅꢀ7KHꢀRXWSXWꢀYROWDJHꢀLVꢀPRQLWRUHGꢀE\ꢀWKHꢀYROWDJHꢀGHWHFWRUꢀZKLFKꢀLVꢀEXLOWꢄLQꢀWKHVH
,&Vꢅ
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+&'ꢈꢅ
7KHꢀRXWSXWꢀYROWDJHꢀDQGꢀWKHꢀGHWHFWRUꢀWKUHVKROGꢀYROWDJHꢀFDQꢀEHꢀVHWꢀLQGLYLGXDOO\ꢀIRUꢀHDFKꢀ,&ꢀE\ꢀODVHUꢀWULPPLQJꢅ
)XUWKHUPRUHꢆꢀZKHQꢀDꢀPLFURSURFHVVRUꢀZRUNVꢀ LQFRUUHFWO\ꢆꢀWKHꢀZDWFKGRJꢀWLPHUꢀZKLFKꢀFKHFNVꢀ RYHUꢀPLFURSURFHVVRU
JHQHUDWHVꢀUHVHWꢀVLJQDOVꢀLQWHUPLWWHQWO\ꢀWRꢀSUHYHQWꢀDꢀZKROHꢀV\VWHPꢀIURPꢀEHLQJꢀPDOIXQFWLRQꢅ
7KHꢀWLPHRXWꢀSHULRGVꢀIRUꢀZDWFKGRJꢀDQGꢀUHVHWꢀFDQꢀDOVRꢀEHꢀVHWꢀLQGLYLGXDOO\ꢀE\ꢀDQꢀH[WHUQDOꢀFDSDFLWRUꢀ+&7:ꢈꢅ
FEATURES
• %XLOWꢄLQꢀDꢀZDWFKGRJꢀWLPHU
• 7LPHRXWꢀSHULRGꢀIRUꢀZDWFKGRJꢀDQGꢀJHQHUDWLQJꢀDꢀUHVHWꢀVLJQDOꢀFDQꢀEHꢀVHWꢀE\ꢀDQꢀH[WHUQDOꢀFDSDFLWRU
• :DWFKGRJꢀWLPHUꢀFDQꢀEHꢀVWRSSHGꢀLQGLYLGXDOO\ꢀE\ꢀ&(ꢀ3LQ
• /RZꢀVXSSO\ꢀFXUUHQW ꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅ7\Sꢅꢀꢁ$
• 7KHꢀRXWSXWꢀYROWDJHꢀRIꢀ9ROWDJHꢀ5HJXODWRUꢀDQGꢀWKHꢀGHWHFWRUꢀWKUHVKROGꢀYROWDJHꢀFDQꢀEHꢀVHWꢀLQGLYLGXDOO\ꢀZLWKꢀDꢀVWHSꢀRI
ꢃꢅꢂ9ꢀIRUꢀHDFKꢀ,&ꢀE\ꢀODVHUꢄWULPꢅ
• ꢉLJKꢀ$FFXUDF\ꢀ2XWSXWꢀ9ROWDJHꢀRIꢀ9ROWDJHꢀ5HJXODWRUꢀDQGꢀ'HWHFWRUꢀ7KUHVKROG ꢅꢅꢅꢅꢅꢇꢅꢁꢊ
• 3RZHUꢄRQꢀ5HVHWꢀ'HOD\ꢀ7LPHꢀFDQꢀEHꢀVHWꢀE\ꢀDQꢀH[WHUQDOꢀFDSDFLWRU
• 2XWSXWꢀ&XUUHQWꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅ7\SꢅꢀꢁꢃP$ꢀ+DWꢀ9,1ꢀꢄꢀ9287 ꢇ9ꢈ
• 6PDOOꢀ3DFNDJHꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅ8OWUDꢄPLQLꢀ6623ꢄꢋ*ꢀ+ꢃꢅꢌꢁPPꢀSLWFKꢈ
APPLICATION
• 3RZHUꢀVRXUFHꢀIRUꢀPLFURSURFHVVRUV
1