DAC39RF10 datasheet(162/232 Pages) TI2

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Table 8-45. ES_CTRL Register Field Descriptions (continued)

Bit

Field

Type

Reset

Description

5-4

ESLEN

R/W

00b

Specify the length of the eye-scan test. Larger values will give more

consistent results, but will take longer.

ESLEN : Number of Samples Analyzed

0 : 127

1 : 1032

2 : 8191

3 : 65535

Note: Many eye-scan modes only analyze zeros (or ones). Since

they don’t analyze every sample, those modes will take longer to

complete compared to a mode that analyzes all samples.

3-0

R/W

Specify the eye-scan mode. Applies to all lanes.

ES : Eye-Scan Mode

0 : Eye-scan disabled (default)

1 : Compare. Counts mismatches between the normal sampler and

the eye-scan sampler. Analyzes zeros and ones.

2 : Compare zeros. Same as ES=1, but only analyzes zeros.

3 : Compare ones. Same as ES=1, but only analyzes ones.

4 : Count ones. Increments ECOUNTn when the eye-scan sample is

5-7 : RESERVED

8 : Average zero. Adjusts ESVO_Sn to the average voltage for a

zero.

9 : Outer zero. Adjusts ESVO_Sn to the lowest voltage for a zero.

10 : Inner zero. Adjusts ESVO_Sn to the highest voltage for a zero.

11 : RESERVED

12 : Average one. Adjusts ESVO_Sn to the average voltage for a

one.

13 : Outer one. Adjusts ESVO_Sn to the highest voltage for a one.

14 : Inner one. Adjusts ESVO_Sn to the lowest voltage for a one.

15 : RESERVED

8.43 ESPO Register (Offset = 01F2h) [reset = 00h]

ESPO is shown in Figure 8-44 and described in Table 8-46.

Return to the Register Summary Table.

Eye-Scan Phase Offset

Figure 8-44. ESPO Register

RESERVED

ESPO

R/W-0b

R/W-00h

Table 8-46. ESPO Register Field Descriptions

Bit

Field

Type

Reset

Description

RESERVED

R/W

6-0

ESPO

R/W

Eye-scan phase offset for all lanes. This adjusts the sampling instant

of the eye-scan sampler compared to the normal sampler. This is a

signed value from -64 to +63 and the step size is 1/32th of a UI.

Note: Only change this register while ESRUN=0.

DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

www.ti.com

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