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Bluetooth Dual Mode v5.4 / IEEE 15.4 PHY/RF IP in TSMC22nm ULP
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Power management unit
PMU is designed to supply embedded integrated circuits with stable and precise voltage and 1%-accurate clock frequency. It integrates 4 LDOs and 3 oscillators:
* “Always ON” LDO to supply circuits that are supposed to be always on;
* “Powered Down” LDO to supply digital circuits of “Powered Down” domain
* “Context Safe” LDO to supply digital circuits of “Context Safe” domain
* “Flash” LDO to supply flash memory
* 1.024 MHz oscillator
* 10 MHz oscillator
* 100 MHz oscillator
All LDOs have controllable output voltage level and are complemented with VDD detectors to monitor output voltage value. All LDOs may function in two modes: full power mode and ECO mode to save battery charge if high performance of the system is not required.
* “Always ON” LDO to supply circuits that are supposed to be always on;
* “Powered Down” LDO to supply digital circuits of “Powered Down” domain
* “Context Safe” LDO to supply digital circuits of “Context Safe” domain
* “Flash” LDO to supply flash memory
* 1.024 MHz oscillator
* 10 MHz oscillator
* 100 MHz oscillator
All LDOs have controllable output voltage level and are complemented with VDD detectors to monitor output voltage value. All LDOs may function in two modes: full power mode and ECO mode to save battery charge if high performance of the system is not required.
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