Differential HSTL Class I

UltraScale Architecture SelectIO Resources User Guide (UG571)

Document ID
UG571
Release Date
2022-08-31
Revision
1.14 English

This Figure shows a sample circuit illustrating a termination technique for differential HSTL class-I (1.2V, 1.5V, or 1.8V) with unidirectional termination. In a specific circuit, all drivers and receivers must be at the same voltage level (1.2V, 1.5V, or 1.8V); they are not interchangeable (i.e., HDIFF_HSTL_I_18 should only interface with HSTL_I_18).

Figure 1-56:      Differential HSTL Class I (1.2V, 1.5V, or 1.8V) Unidirectional Termination

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X16116-diff-hstl-class-i-1_2v-1_5v-or-1_8v-uni-term.jpg

This Figure shows a sample circuit illustrating a termination technique for differential HSTL class-I (1.2V, 1.5V, or 1.8V) with bidirectional termination. In a specific circuit, all drivers and receivers must be at the same voltage level (1.2V, 1.5V, or 1.8V); they are not interchangeable (i.e., DIFF_HSTL_I_18 should only interface with DIFF_HSTL_I_18).

Figure 1-57:      Differential HSTL Class I (1.2V, 1.5V, or 1.8V) Bidirectional Termination

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X16117-diff-hstl-class-i-1_2v-1_5v-or-1_8v-bidi-term.jpg

This Figure shows a sample circuit illustrating a termination technique for differential HSTL class-I (1.2V, 1.5V, or 1.8V) with unidirectional DCI termination. In a specific circuit, all drivers and receivers must be at the same voltage level (1.2V, 1.5V, or 1.8V); they are not interchangeable (i.e., DIFF_HSTL_I_DCI should only interface with DIFF_HSTL_I_DCI). Only HP I/O banks support these DCI standards.

Figure 1-58:      Differential HSTL Class I (1.2V, 1.5V, or 1.8V) DCI Unidirectional Termination

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X16118-diff-hstl-class-i-1_2v-1_5v-or-1_8v-dci-uni-term.jpg

This Figure shows a sample circuit illustrating a termination technique for differential HSTL class-I (1.2V, 1.5V, or 1.8V) with bidirectional DCI termination. In a specific circuit, all drivers and receivers must be at the same voltage level (1.2V, 1.5V, or 1.8V); they are not interchangeable (i.e., DIFF_HSTL_I_DCI should only interface with DIFF_HSTL_I_DCI). Only HP I/O banks support these DCI standards.

Figure 1-59:      Differential HSTL Class I (1.2V, 1.5V, or 1.8V) DCI Bidirectional Termination

X-Ref Target - Figure 1-59

X16119-diff-hstl-class-i-1_2v-1_5v-or-1_8v-dci-bidi-term.jpg