DAC39RF10 datasheet(179/232 Pages) TI2

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Table 8-78. FREQ[0] Register Field Descriptions

Bit

Field

Type

Reset

Description

63-0

FREQ[0]

R/W

0000

0000h

The NCO frequency (FNCO) is:

FNCO = FREQ[0] * 2-64 * FCLK

where FCLK is the sample frequency of the DAC. FREQ[0] is the

integer value of this register. This register can be interpreted as

signed or unsigned (both interpretations are valid).

Use this equation to determine the value to program:

FREQ[0] = 264 * FNCO /FCLK

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

event specified by NCO_SYNC_SRC.

Note: This register should only be changed when DP_EN=0 or

updates to the NCOs are scheduled to occur away from the change.

(See NCO_SYNC.)

Note: This register has no effect when FR_EN=1.

8.73 FREQ[1] Register (Offset = 0328h) [reset = 0000000000000000h]

FREQ[1] is described in Table 8-79.

Return to the Register Summary Table.

FREQ for NCO1 Accumulator.

Table 8-79. FREQ[1] Register Field Descriptions

Bit

Field

Type

Reset

Description

63-0

FREQ[1]

R/W

0000

0000h

The NCO frequency (FNCO) is:

FNCO = FREQ[1] * 2-64 * FCLK

where FCLK is the sample frequency of the DAC. FREQ[1] is the

integer value of this register. This register can be interpreted as

signed or unsigned (both interpretations are valid).

Use this equation to determine the value to program:

FREQ[1] = 264 * FNCO /FCLK

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

event specified by NCO_SYNC_SRC.

Note: This register should only be changed when DP_EN=0 or

updates to the NCOs are scheduled to occur away from the change.

(See NCO_SYNC.)

Note: This register has no effect when FR_EN=1.

8.74 FREQ[2] Register (Offset = 0330h) [reset = 0000000000000000h]

FREQ[2] is described in Table 8-80.

Return to the Register Summary Table.

FREQ for NCO2 Accumulator.

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DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

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