Structured circuit simulation system, selection method and device of clock reference thereof
A clock reference and circuit simulation technology, applied in time division multiplexing systems, transmission systems, synchronization devices, etc., can solve problems affecting clock synchronization, reference cannot be switched, and chip circuits cannot be changed, etc., to simplify configuration operations, Easy to switch effects
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[0041] The present invention proposes a flexible clock reference selection scheme, which is mainly reflected in three aspects. First, each alternative clock source can control whether to output according to the business situation, so as to facilitate the switching of the active and standby clock references; second, the clock reference It is configurable whether to select from the E1 / T1 line side or the clock side recovered from the PW, which increases the flexibility in engineering; thirdly, the first clock input is fixedly selected as the main clock reference, and the second clock input is selected The input serves as an alternate clock reference, simplifying chip configuration.
[0042] The clock reference selection method provided by the present invention includes:
[0043] One (for example, the first) TDM clock input of the device with circuit simulation function is fixed as the main clock reference input, and the other (for example, the second) TDM clock input of the devi...
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