Memory save on power-down
The circuit described involves a power management system that utilizes both a main output and an auxiliary output to ensure reliable operation of memory components within an electronic system. The main output serves as the primary power source for the overall system, while the auxiliary output specifically provides power to the memory module.
The memory store pin is crucial in this configuration, as it facilitates communication between the main output and the memory. When the system experiences a power failure or significant voltage drop, the main output transitions to a low state. This condition signals the memory to execute a store operation, effectively saving critical data before complete power loss occurs.
Following the transition of the main output to low, the auxiliary output is designed to drop out, ceasing its power delivery to the memory. This sequential operation ensures that the memory has sufficient time to complete its data storage processes, thus enhancing data integrity and preventing potential loss.
In terms of implementation, this circuit may include a voltage supervisor or comparator that monitors the main output voltage. Upon detecting a drop below a predetermined threshold, the supervisor can trigger the necessary actions to transition the main output low and subsequently disengage the auxiliary output. Components such as capacitors may be included to provide temporary power during the transition period, allowing the memory to complete its operations without data loss.
Overall, this power management system is essential for applications requiring data retention during power interruptions, ensuring that memory components operate reliably and efficiently under varying power conditions.The auxiliary output powers the memory, while the main output powers the system and is connected to the memory store pin. When power goes down, the main output goes low, commanding the memory to store. The auxiliary output then drops out.
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