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GS1675 データシート(PDF) 7 Page - Gennum Corporation |
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GS1675 データシート(HTML) 7 Page - Gennum Corporation |
7 / 37 page GS1675 SD/HD SDI Reclocker Data Sheet 54174 - 1 June 2011 7 of 37 1.3 Default Start-up Settings The GS1675 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. Table 1-2: GS1675 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 - GS1675 |
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同様の説明 - GS1675 |
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