SIM Card Holder Hot-Plug Protection and NFC Power Management
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Solution Overview
Problem
Existing SIM card hot plugging methods have low reliability and can damage the interface during the process, and they do not support NFC card swiping when the terminal is in a power-off state due to disconnected signal and power supply paths.
Innovation Solution
A method that generates a power-off control signal when the SIM card touches a signal generating switch, disconnecting the signal and power supply paths in a preset sequence to prevent unexpected signal conflicts, and includes a mechanism to reconnect paths for NFC functionality during a power-off state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the in-position detection switch generates a disconnection trigger signal after the SIM card is entirely removed or inserted, then the SIM card hot plugging protection is implemented, but the reliability is low and the interface may be damaged during the hot plugging process
Solution Approach 1:
The patent applies preliminary action by generating the disconnection trigger signal before the SIM card is fully inserted or removed from the holder. The in-position detection switch is configured to detect the SIM card's insertion or removal state in advance, triggering the disconnection of signal and power supply paths before complete contact or separation occurs. This prevents signal conflicts and interface damage by proactively disconnecting paths during the hot plugging process.
2Reliability
If the signal transmission path and power supply path of the SIM card holder are disconnected when the terminal is in a power-off state, then hot plugging protection is achieved, but the NFC card swiping function cannot be performed
Solution Approach 1:
The patent applies dynamics by making the connection state of the SIM card holder adaptive rather than fixed. When the terminal is in a power-off state, the system dynamically adjusts by keeping the signal transmission path and power supply path connected, allowing the NFC card swiping function to operate. This dynamic state management resolves the contradiction between maintaining hot plugging protection and enabling NFC functionality during power-off states.
Data Source
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AI summary
Embodiments of the present invention provide a SIM card hot plugging protection method and a SIM card in-position power-off card swiping method, and a terminal. The SIM card hot plugging protection method includes: if it is listened and obtained that a first signal generating switch in a SIM card holder triggers a first active level, generating a power-off control signal according to the first active level, where the first active level is triggered by touching the first signal generating switch by a SIM card when the SIM card is moved to a first position of the SIM card holder during a process of inserting the SIM card, or the first active level is triggered by touching the first signal generating switch by the SIM card when the SIM card is moved to a second position of the SIM card holder during a process of removing the SIM card; and performing power-off processing on the SIM card holder according to the power-off control signal. Compared with a technical solution of time sequence adjustment that is used in the prior art, the method provided in the embodiments of the present invention has higher reliability.