AIO12_LVAUX and DIFF_AIO12_LVAUX

The adaptive I/O (AIO) standards are intended to provide 1.2V I/O standards for LVAUX mode that are similar to the POD12 and DIFF_POD12 I/O standards. See the POD12 and POD10 section in the UltraScale Architecture SelectIO Resources User Guide (UG571) for information on how POD standards typically function. The differences between AIO12_LVAUX/DIFF_AIO12_LVAUX and POD12/DIFF_POD12 are highlighted in this section.

The AIO12_LVAUX and DIFF_AIO12_LVAUX standards support the 40Ω source termination feature (OUTPUT_IMPEDANCE). They do not support the 60Ω or 48Ω source termination feature used by POD12 and DIFF_POD12.
The AIO12_LVAUX and DIFF_AIO12_LVAUX standards support ODT values of RTT_40 and RTT_60. They do not support an ODT value of RTT_NONE.
The AIO12_LVAUX and DIFF_AIO12_LVAUX standards only support a PRE_EMPHASIS of RDRV_240. They do not support a PRE_EMPHASIS value of RDRV_NONE used by POD12 and DIFF_POD12.
AMD does not support the DCI versions of AIO12_LVAUX and DIFF_AIO12_LVAUX.
AIO12_LVAUX and DIFF_AIO12_LVAUX are only available for HP I/O banks and use V_REF.

Table 1. AIO Allowed Attributes
Attributes	Primitives
	IBUF/IBUF3/IBUFDS/IBUFDSE3		OBUF/OBUFT		IOBUF/IOBUFE3/IOBUFDS/IOBUFDSE3
	HP I/O Banks		HP I/O Banks		HP I/O Banks
	Allowed Values	Default	Allowed Values	Default	Allowed Values	Default
IOSTANDARD	AIO_LVAUX DIFF_AIO12_LVAUX		AIO_LVAUX DIFF_AIO12_LVAUX		AIO_LVAUX DIFF_AIO12_LVAUX
SLEW	N/A		FAST MEDIUM SLOW	SLOW	FAST MEDIUM SLOW	SLOW
PRE_EMPHASIS	N/A		RDRV_240	RDRV_240	RDRV_240	RDRV_240
DQS_BIAS	FALSE	FALSE	N/A		FALSE	FALSE
ODT	RTT_40 RTT_60	RTT_40	N/A		RTT_40 RTT_60	RTT_40
OUTPUT_IMPEDENCE	N/A		RDRV_40_40	RDRV_40_40	RDRV_40_40	RDRV_40_40

Table 2. Allowed Combinations of OUTPUT_IMPEDENCE, ODT, and PRE_EMPHASIS
OUTPUT_IMPEDENCE	SLEW	ODT	PRE_EMPHASIS
RDRV_40_40 (40Ω)	FAST	RTT_40	RDRV_240
RDRV_40_40 (40Ω)	FAST	RTT_60	RDRV_240

Table 3. Allowed Combinations of OUTPUT_IMPEDENCE and PRE_EMPHASIS
OUTPUT_IMPEDENCE	SLEW	PRE_EMPHASIS
RDRV_40_40 (40Ω)	FAST	RDRV_240

AIO12_LVAUX and DIFF_AIO12_LVAUX - UG584

Using LVAUX Mode in XQ Ruggedized UltraScale+ Devices for Airborne Systems Design Guide (UG584)