DesignProject

DesignProject - DESIGN PROJECT: POWER FAILURE DETECTOR...

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DESIGN PROJECT: POWER FAILURE DETECTOR OBJECTIVES : The purpose of this assignment is to design a warning system for a microprocessor system that detects upcoming power failures early enough so that the microprocessor can save vital data into non-volatile memory. EQUIPMENT: Oscilloscope LM 393 Comparator Resistors BACKGROUND: Microprocessors (and computers in general), store data in Random Access Memory (RAM). However, when power is lost, data is also lost (volatile memory). In accidental power failures, there is usually enough time until power is totally lost, to save vital data in battery backed memory or flash memory (non- volatile memory). This is possible if the CPU receives an early warning of an upcoming power loss (black-out), or a power (voltage) drop (brown- out). In regulated power supplies, it is common to monitor the unregulated voltage at the input of the voltage regulator, and issue a warning when it drops below a safe level. During brown-outs (voltage is low, but not totally lost), the CPU may
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DesignProject - DESIGN PROJECT: POWER FAILURE DETECTOR...

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