DAC39RF10 datasheet(136/232 Pages) TI2

136 / 232 page

The FR interface registers are listed in Table 7-44. There are two registers that can change the NCO frequency

- FR_FREQL[3:0] is 64-bits for each NCO and changes the entire frequency word. FR_FREQS[3:0] is 32-bits for

each NCO and changes only the upper 32-bits of the frequency word, providing for faster frequency changes.

Table 7-44. FR Interface Registers

Address

Name

Description

0x00FF

FR_NCO_AR

FR NCO Accumulator Reset (default: 0x0f)

[7:4] RESERVED

[3:0] FR_NCO_AR For each bit FR_NCO_AR[n], if set, the accumulator for NCOn

is reset on every sync event specified by NCO_SYNC_SRC.

Note: This register has no effect when FR_EN=0.

0x0100-0x011F

FR_FREQL[3:0]

FR 64-bit Frequency for NCO Accumulator (default for FR_FREQL[n]=0x00)

The frequency setting for FR_FREQL[0] is at the lowest address.

[63:0] FR_FREQL[n] This register is used instead of FREQ[n] when FR_EN=1.

Changes to the upper 32-bits of this register also change FR_FREQS[n].

Note: Changes to this register do not take effect until the next sync event specified

by NCO_SYNC_SRC.

Note: This register has no effect when FR_EN=0.

0x0120-0x0127

FR_PHASE[3:0]

FR Phase for NCO Accumulator (default for FR_PHASE[n]=0x0000)

The phase setting for FR_PHASE[0] is at the lowest address.

[15:0] FR_PHASE[n] This register is used instead of PHASE[n] when FR_EN=1.

Note: Changes to this register do not take effect until the next sync event specified

by NCO_SYNC_SRC.

Note: This register has no effect when FR_EN=0.

0x0128-0x0137

FR_FREQS[3:0]

FR 32-bit Frequency for NCO Accumulator (default for FR_FREQS[n]=0x00)

The frequency setting for FR_FREQS[0] is at the lowest address.

[31:0] FR_FREQS[n] This register is used instead of FREQ[n] when FR_EN=1.

Changes to this register also change the upper 32-bits of FR_FREQL[n]. This

frequency are always controlled by FR_FREQL[n].

Note: Changes to this register do not take effect until the next sync event specified

by NCO_SYNC_SRC.

Note: This register has no effect when FR_EN=0.

DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

www.ti.com

136

Submit Document Feedback

Product Folder Links: DAC39RF10-SP DAC39RF10-SEP DAC39RFS10-SP DAC39RFS10-SEP

DAC39RF10 Datasheet(PDF) 136 Page - Texas Instruments

DAC39RF10 Datasheet(HTML) 136 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL