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DAC39RF10 Datasheet(PDF) 175 Page - Texas Instruments |
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DAC39RF10 Datasheet(HTML) 175 Page - Texas Instruments |
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175 / 232 page  Table 8-71. NCO_CTRL Register Field Descriptions (continued) Bit Field Type Reset Description 2 NCO_SC R/W 0b Self-Coherent NCO Mode: When this bit is set, all NCOs use the reference counter from the NCO in DDS/DUC channel 0. This is typically used along with the NCO_SS register. This only impacts phase-coherent mode (NCO_CONT=0). 1 DDS_EN R/W 0b When set, all DUCs are configured for DDS operation once DP_EN is set. See DDS Operation in Section 7.4.1 for details. 0 NCO_EN R/W 0b When set, DUC samples are mixed with the NCO. 8.68 NCO_CONT Register (Offset = 0301h) [reset = 00h] NCO_CONT is shown in Figure 8-70 and described in Table 8-72. Return to the Register Summary Table. NCO Phase Continuous Mode Figure 8-70. NCO_CONT Register 7 6 5 4 3 2 1 0 RESERVED NCO_CONT R/W-0h R/W-0h Table 8-72. NCO_CONT Register Field Descriptions Bit Field Type Reset Description 7-4 RESERVED R/W 0h 3-0 NCO_CONT R/W 0h For each bit NCO_CONT[n], if set, NCOn operates in phase- continuous mode. This means that frequency changes occur without seeding the phase accumulator. If the bit is clear, NCOn operates in phase-coherent mode. During frequency changes, the phase accumulator is seeded from a main counter. This means that if changing from frequency A to B and then back to A, the phase returns to what it would have been if the change never occurred. Note: This register should only be changed when DP_EN=0. 8.69 NCO_SYNC Register (Offset = 0302h) [reset = 00h] NCO_SYNC is shown in Figure 8-71 and described in Table 8-73. Return to the Register Summary Table. NCO Synchronization Configuration Figure 8-71. NCO_SYNC Register 7 6 5 4 3 2 1 0 RESERVED NCO_SYNC_SRC R/W-00h R/W-00b Table 8-73. NCO_SYNC Register Field Descriptions Bit Field Type Reset Description 7-2 RESERVED R/W 00h www.ti.com DAC39RF10-SP, DAC39RF10-SEP DAC39RFS10-SP, DAC39RFS10-SEP SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026 Copyright © 2026 Texas Instruments Incorporated Submit Document Feedback 175 Product Folder Links: DAC39RF10-SP DAC39RF10-SEP DAC39RFS10-SP DAC39RFS10-SEP |
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