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データシートサーチシステム |
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データシートサーチシステム |
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GS2965 データシート(PDF) 8 Page - Semtech Corporation |
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GS2965 データシート(HTML) 8 Page - Semtech Corporation |
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8 / 41 page  GS2965 Multi-Rate SDI Reclocker with Equalization & De-emphasis Data Sheet 52462 - 4 July 2012 8 of 41 Proprietary & Confidential 1.3 Default Start-up Settings The GS2965 has some functions that are not accessible via direct pin control, and are only accessible through the host interface registers. These functions have an internal pull-up or pull-down resistor that sets the default logic level or start-up state, if it is not already set by a pin. If the user wishes to override these logic levels, the associated bit should be programmed within the PIN_OR_1 register (pin override register) at address 0x0C. The logic values within the PIN_OR_1 register become active when the user sets the Pin Override Enable bit to HIGH within that same register. Table 1-2 shows: 1. The default logic state set by the internal pull up or pull down resistors. 2. The default values within the Pin Override register upon reset. More details are given in Section 4.15. Table 1-2: GS2965 Default Start-up Settings Name Description Default State set by Internal Resistors Default State within the Pin Override Register DDI_SEL[0:1] Selects one of two serial digital input signals for processing. DDI0 is selected by default. 0:0 0:0 BYPASS Bypasses the reclocker stage when set HIGH. 0 0 AUTOBYPASS When set HIGH, this bit automatically bypasses the reclocker stage when the PLL is not locked to a supported rate. 00 AUTO/MAN When set HIGH, the standard is automatically detected from the input data rate. 10 SS0, SS1 When AUTO/MAN is set HIGH, SS[1:0] are outputs displaying the data rate to which the PLL has locked. Therefore, they will not have default values. None 0:0 KBB Controls the loop bandwidth of the PLL. Floating Ground DATA_MUTE Mutes the DDO0/DDO0 and DDO1/DDO1 (if data is selected) outputs when LOW. 10 DDO1_DISABLE Disables the DDO1/RCO and DDO1/RCO outputs when LOW. 00 DATA/CLOCK HIGH = DATA LOW = CLOCK 00 |
同様の部品番号 - GS2965 |
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同様の説明 - GS2965 |
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