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AD9530 Datasheet(PDF) 40 Page - Analog Devices |
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AD9530 Datasheet(HTML) 40 Page - Analog Devices |
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40 / 41 page  AD9530 Data Sheet Rev. 0 | Page 40 of 41 Bits Bit Name Settings Description Default Access 0 PFD_ENABLE PFD enable. This bit enables the phase frequency detector. 1b RW 0 Disabled. 1 Enabled (default). LOOP FILTER (REGISTER 0x027) Table 58. Bit Descriptions for LOOP_FILTER (Default: 0x13) Bits Bit Name Settings Description Default Access [7:6] RESERVED 00b When writing to Register 0x027, these bits must be 00b 00b W [5:2] LOOP_FILTER_CAP Loop filter capacitance select (CIN in Figure 16) 0x4 RW 0000 5 pF 0001 17.5 pF 0010 30 pF 0011 42.5 pF 0100 55 pF (default) 0101 67.5 pF 0110 80 pF 0111 92.5 pF 1000 105 pF 1001 117.5 pF 1010 130 pF 1011 142.5 pF 1100 155 pF 1101 167.5 pF 1110 180 pF 1111 192.5 pF 1 LOOP_FILTER_BIAS_EN Loop filter enable bias 1b RW 0 Disabled 1 Enabled (default) 0 LOOP_FILTER_AMP_EN Loop filter enable amplifier 1b RW 0 Disabled 1 Enabled (default) VCO FREQUENCY (REGISTER 0x028) Table 59. Bit Descriptions for VCO_READBACK (Default: 0x00) Bits Bit Name Settings Description Default Access [7:5] RESERVED Reserved 000b R [4:0] VCO_FREQ_AUTOCAL Read only VCO autocalibrated frequency band. This is a diagnostic bit and the user normally does not need to access this register. Varies R USER SCRATCH PAD 2 (REGISTER 0x0FE) Table 60. Bit Descriptions for USER_SCRATCHPAD2 (Default: 0x00) Bits Bit Name Settings Description Reset Access [7:0] USER_SCRATCHPAD2, Bits[7:0] 0x00 to 0xFF This register has no effect on device operation. It is available for serial port debugging or register setting revision control. There are two additional user scratch pad registers at Address 0x00A and Address 0x0FF. 0x00 RW USER SCRATCH PAD 3 (REGISTER 0x0FF) Table 61. Bit Descriptions for USER_SCRATCHPAD3 (Default: 0x00) Bits Bit Name Settings Description Reset Access [7:0] USER_SCRATCHPAD3, Bits[7:0] 0x00 to 0xFF This register has no effect on device operation. It is available for serial port debugging or register setting revision control. There are two additional user scratch pad registers at Address 0x00A and Address 0x0FE. 0x00 RW |
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