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AD9524BCPZ Datasheet(PDF) 45 Page - Analog Devices |
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AD9524BCPZ Datasheet(HTML) 45 Page - Analog Devices |
45 / 56 page Data Sheet AD9524 Rev. F | Page 45 of 56 Table 41. PLL1 Input Receiver Control Address Bits Bit Name Description 0x01A 7 REF_TEST input receiver enable 1: enabled. 0: disabled (default). 6 REFB differential receiver enable 1: differential receiver mode. 0: single-ended receiver mode (also depends on Register 0x01B, Bit 1) (default). 5 REFA differential receiver enable 1: differential receiver mode. 0: single-ended receiver mode (also depends on Register 0x01B, Bit 0) (default). 4 REFB receiver enable REFB receiver power-down control mode only when Bit 2 = 1. 1: enable REFB receiver. 0: power-down (default). 3 REFA receiver enable REFA receiver power-down control mode only when Bit 2 = 1. 1: enable REFA receiver. 0: power-down (default). 2 Input REFA and REFB receiver power-down control enable Enables power-down control of the input receivers, REFA and REFB. 1: power-down control enabled. 0: both receivers enabled (default). 1 OSC_IN single-ended receiver mode enable (CMOS mode) Selects which single-ended input pin is enabled when in the single-ended receiver mode (Register 0x01A, Bit 0 = 0). 1: negative receiver from oscillator input (OSC_IN pin) selected. 0: positive receiver from oscillator input (OSC_IN pin) selected (default). 0 OSC_IN differential receiver mode enable 1: differential receiver mode. 0: single-ended receiver mode (also depends on Bit 1) (default). Table 42. REF_TEST, REFA, REFB, and ZD_IN Control Address Bits Bit Name Description 0x01B [7:6] Reserved 0: reserved (default). 5 Zero delay mode Selects the zero delay mode used (via the ZD_IN pin) when Register 0x01B, Bit 4 = 0. Otherwise, this bit is ignored. 1: internal zero delay mode. The zero delay receiver is powered down. The internal zero delay path from Distribution Divider Channel 0 is used. 0: external zero delay mode. The ZD_IN receiver is enabled. 4 OSC_IN signal feedback for PLL1 Controls the input PLL feedback path, local feedback from the OSC_IN receiver or zero delay mode. 1: OSC_IN receiver input used for the input PLL feedback (non-zero delay mode). 0: zero delay mode enabled (also depends on Register 0x01B, Bit 4 to select the zero delay path. 3 ZD_IN single-ended receiver mode enable (CMOS mode) Selects which single-ended input pin is enabled when in the single-ended receiver mode (Register 0x01B, Bit 2 = 0). 1: ZD_IN pin enabled. 0: ZD_IN pin enabled. 2 ZD_IN differential receiver mode enable 1: differential receiver mode. 0: single-ended receiver mode (also depends on Register 0x01B, Bit 3). 1 REFB single-ended receiver mode enable (CMOS mode) Selects which single-ended input pin is enabled when in single-ended receiver mode (Register 0x01A, Bit 6 = 0). 1: REFB pin enabled. 0: REFB pin enabled. 0 REFA single-ended receiver mode enable (CMOS mode) Selects which single-ended input pin is enabled when in single-ended receiver mode (Register 0x01A, Bit 5 = 0). 1: REFA pin enabled. 0: REFA pin enabled. |
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