データシートサーチシステム |
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Si5347D-D-GM データシート(PDF) 8 Page - Silicon Laboratories |
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Si5347D-D-GM データシート(HTML) 8 Page - Silicon Laboratories |
8 / 55 page 3.6 Inputs (IN0, IN1, IN2, IN3) There are four inputs that can be used to synchronize any of the DSPLLs. The inputs accept both differential and single-ended clocks. A crosspoint between the inputs and the DSPLLs allows any of the inputs to connect to any of the DSPLLs, as shown in the figure below. Input Crosspoint DSPLL A DSPLL B DSPLL C DSPLL D 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 Si5347 ÷ P0n P0d ÷ P1n P1d ÷ P2n P2d ÷ P3n P3d IN0 IN0b IN1 IN1b IN2 IN2b IN3 IN3b Figure 3.4. DSPLL Input Selection Crosspoint 3.6.1 Input Selection Input selection for each of the DSPLLs can be made manually through register control or automatically using an internal state machine. 3.6.2 Manual Input Selection In Manual Mode, the input selection is made by writing to a register. If there is no clock signal on the selected input, the DSPLL will automatically enter Holdover Mode. 3.6.3 Automatic Input Selection When configured in this mode, the DSPLL automatically selects a valid input that has the highest configured priority. The priority scheme is independently configurable for each DSPLL and supports revertive or non-revertive selection. All inputs are continuously monitored for loss of signal (LOS) and/or invalid frequency range (OOF). Only inputs that do not assert both the LOS and OOF monitors can be selected for synchronization by the automatic state machine. The DSPLL(s) will enter the Holdover mode if there are no valid inputs available. Si5347/46 Rev D Data Sheet Functional Description silabs.com | Smart. Connected. Energy-friendly. Rev. 1.0 | 7 |
同様の部品番号 - Si5347D-D-GM |
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同様の説明 - Si5347D-D-GM |
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