ADM809-5LART-REEL7

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ADM809-5LART-REEL7 is a microprocessor reset and system memory supervisor (PMIC - Supervisors) and power management IC. It is designed to ensure reliable, proper reset of and operation of microprocessors (MPUs) and related logic, even when operating with power supply voltages near or below 1.8 V. The ADM809-5LART-REEL7 has five main features: power-on reset and configuration, manual reset, processor reset, system memory reset and delay reset.

The power-on reset (POR) and configuration feature of the ADM809-5LART-REEL7 helps to ensure that microprocessors and other logic receive the proper power-on reset to start system operation. This feature provides an early warning of power supply problems, allowing the system to respond to unwanted events, such as voltage transients. The manual reset feature allows external signals to reset the system quickly, manually resetting the MPU, system memory and other logic.

The processor reset feature of the ADM809-5LART-REEL7 also provides an important protection to the system by momentarily resetting a variety of Cortex-M processor cores when an unexpected event occurs. It is also capable of controlling the shutdown of the processor core to facilitate software updates or to allow a limited number of low-power modes to be used.

The system memory reset feature of the ADM809-5LART-REEL7 is designed to prevent the loss of critical execution data stored in system memory when an unexpected event occurs. The power-on reset state of the system can also be restored quickly. This feature is particularly useful in automotive applications, where large system memory configurations are required to support multiple ECUs (electronic control units).

The delay reset feature of the ADM809-5LART-REEL7 allows the processor to remain in reset for a specified period of time after a reset event to allow critical operations to complete or to provide an orderly system shutdown. This feature can also be used to reset the processor after a system reset to allow full reset operation.

The typical application field of the ADM809-5LART-REEL7 is when a manual or power-on reset is required for microprocessors, system memory and other logic. The ADM809-5LART-REEL7 can also be used in automotive, industrial and consumer applications including microcontrollers and processors, memory controllers, memory buffers, field-programmable gate arrays (FPGAs) and application specific integrated circuits (ASICs). Generally it is used as protection against power-supply problems, as well as other system issues such as brownouts and unexpected events.

The working principle of the ADM809-5LART-REEL7 is to monitor the logic signals and the power supply voltage to detect any voltage deviation or short events and then reset the microprocessor and related logic in the system. The reset of the microprocessor stops all instructions, but the internal registers and system memory remain unchanged. The delay reset feature gives the system time to respond to the reset and to perform any necessary actions while the processor is held in reset. After a short delay period, the processor is released from reset and is allowed to start processing instructions.

In conclusion, the ADM809-5LART-REEL7, a microprocessor reset and system memory supervisor as part of the PMIC - Supervisors family, is designed to ensure reliable and proper reset of microprocessors and related logic, even when operating with low power supply voltages. Its five main features -- power-on reset and configuration, manual reset, processor reset, system memory reset and delay reset -- provide an effective way to protect a system from voltage transients and other unexpected events. The typical application of such a component is when a manual or power-on reset is necessary for microprocessors, system memory and related logic in automotive, industrial, and consumer applications.

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