Scalable Low Voltage Signaling (SLVS_400) - Scalable Low Voltage Signaling (SLVS_400)

Scalable Low Voltage Signaling (SLVS_400) - Scalable Low Voltage Signaling (SLVS_400) - UG861

Spartan UltraScale+ FPGAs SelectIO Resources User Guide (UG861)

Document ID

UG861

Release Date

2026-04-28

Revision

1.1 English

SLVS_400 is supported in HD I/O banks as SLVS_400_25 and in HP I/O banks as SLVS_400_18. SLVS_400 is only supported in receivers.

Table 1. Available I/O Bank Type
HD	HP	XP5IO
Available (SLVS_400_25. Input only)	Available (SLVS_400_18 only)	N/A

The following table lists the allowed attributes for the SLVS_400 I/O standards. Support is implied for primitives that are derivatives of the primitives listed in the following table (for example: *_DIFF_OUT, *_DCIEN, *_IBUFDISABLE, or *_INTERMDISABLE). Refer to SelectIO IOB Interface Primitives for all supported derivatives.

Table 2. Allowed Attributes for the SLVS_400 I/O Standards
Attributes	Primitives
	IBUFDS		OBUFDS or OBUFTDS
	Allowed Values	Default	OBUFDS or OBUFTDS
IOSTANDARD	SLVS_400_25 for HD I/O banks SLVS_400_18 for HP I/O banks		N/A
DIFF_TERM (HP only)	TRUE FALSE	FALSE	N/A
DIFF_TERM_ADV (HP only)	TERM_NONE TERM_100	TERM_NONE	N/A