Abstract: A power management chip comprises a multiplexed pin for receiving a communication indication signal, transmitting an analog signal and transmitting a digital signal; The communication circuit is configured to execute digital communication through the multiplexed pin; And a logic control core unit coupled to the multiplexed pin for receiving the communication indication signal from the multiplexed pin and configuring the multiplexed pin to transmit the digital signal based on the communication indication signal. In this way, only one pin is needed to receive the communication indication signal, transmit the analog signal and transmit the digital signal at the same time, thus saving the pin resources of the power management chip.

Abstract: A high-side driving circuit, comprising an input terminal, an output terminal, and a power supply terminal. The input terminal receives a high-side switching control signal. The output terminal is coupled to a control terminal of a high-side power switching device and configured to provide a high-side driving signal to control the turn-on and turn-off switching of the high-side power switching device. The power supply terminal receives a the bootstrap voltage from a bootstrap capacitor. The high-side driving circuit is configured to: during a startup phase or initialization phase of the high-side driving circuit, output the high-side driving signal after a delay period in response to the bootstrap voltage becoming higher than a first under-voltage threshold; and during a stable operation state of the high-side driving circuit, stop outputting the high-side driving signal in response to the bootstrap voltage becoming lower than a second under-voltage threshold.

Abstract: A power management chip comprises a multiplexed pin for receiving a communication indication signal, transmitting an analog signal and transmitting a digital signal; The communication circuit is configured to execute digital communication through the multiplexed pin; And a logic control core unit coupled to the multiplexed pin for receiving the communication indication signal from the multiplexed pin and configuring the multiplexed pin to transmit the digital signal based on the communication indication signal. In this way, only one pin is needed to receive the communication indication signal, transmit the analog signal and transmit the digital signal at the same time, thus saving the pin resources of the power management chip.

Abstract: A two-way key switching method and an implementation device. The method includes: when acquiring a new key, any end in a communication link setting a new key transmitting direction to be unavailable and setting a new key receiving direction to be available; after it is presumed or determined that at least n opposite ends have acquired the new key and before an original key is invalid, the any end starting a first key switching process, to set the transmitting direction of the original key to be unavailable and set the new key transmitting direction to be available, where N?n?1, and N is the total number of receiving sides corresponding to the transmitting side; according to a protection identifier of data transmitted from the opposite end, the any end selecting a valid key to perform deprotection; and after the data is successfully deprotected with the new key for the first time, the any end starting a second key switching process, to set the receiving direction of the original key to be unavailable.

Abstract: A one-way key switching method and an implementation device. The method comprises: after obtaining a new key and before deducing or determining that at least n receivers obtain the new key, a sender setting the sending direction of the new key as unavailable and keeping the sending direction of an original key as available; after obtaining the new key and before deducing or determining that at least n receivers obtain the new key, before the original key is invalid, the sender starting up a key switching process, i.e. setting the sending direction of the original key as unavailable and setting the sending direction of the new key as available; where N?n?1, N is the total number of the receivers corresponding to the sender.

Abstract: A one-way key switching method and an implementation device. The method comprises: after obtaining a new key and before deducing or determining that at least n receivers obtain the new key, a sender setting the sending direction of the new key as unavailable and keeping the sending direction of an original key as available; after obtaining the new key and before deducing or determining that at least n receivers obtain the new key, before the original key is invalid, the sender starting up a key switching process, i.e. setting the sending direction of the original key as unavailable and setting the sending direction of the new key as available; where N?n?1, N is the total number of the receivers corresponding to the sender.

Abstract: A two-way key switching method and an implementation device. The method includes: when acquiring a new key, any end in a communication link setting a new key transmitting direction to be unavailable and setting a new key receiving direction to be available; after it is presumed or determined that at least n opposite ends have acquired the new key and before an original key is invalid, the any end starting a first key switching process, to set the transmitting direction of the original key to be unavailable and set the new key transmitting direction to be available, where N?n?1, and N is the total number of receiving sides corresponding to the transmitting side; according to a protection identifier of data transmitted from the opposite end, the any end selecting a valid key to perform deprotection; and after the data is successfully deprotected with the new key for the first time, the any end starting a second key switching process, to set the receiving direction of the original key to be unavailable.