NI DIGITAL PATTERN DRIVER Level Configuration Attributes

Level Configuration Attributes

• NIDIGITAL_ATTRIBUTE_VIL
• NIDIGITAL_ATTRIBUTE_VIH
• NIDIGITAL_ATTRIBUTE_VOL
• NIDIGITAL_ATTRIBUTE_VOH
• NIDIGITAL_ATTRIBUTE_VTERM
• NIDIGITAL_ATTRIBUTE_TERMINATION_MODE
• NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_IOL
• NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_IOH
• NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_VCOM

NIDIGITAL_ATTRIBUTE_VIL

Specific Attribute:

Numeric Value	1150007
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureVoltageLevels

Description:

Specifies the voltage that the digital pattern instrument will apply to the input of the DUT when the test instrument drives a logic low (0).

NIDIGITAL_ATTRIBUTE_VIH

Specific Attribute:

Numeric Value	1150008
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureVoltageLevels

Description:

Specifies the voltage that the digital pattern instrument will apply to the input of the DUT when the test instrument drives a logic high (1).

NIDIGITAL_ATTRIBUTE_VOL

Specific Attribute:

Numeric Value	1150009
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureVoltageLevels

Description:

Specifies the output voltage from the DUT below which the comparator on the digital pattern test instrument interprets a logic low (L).

NIDIGITAL_ATTRIBUTE_VOH

Specific Attribute:

Numeric Value	1150010
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureVoltageLevels

Description:

Specifies the output voltage from the DUT above which the comparator on the digital pattern test instrument interprets a logic high (H).

NIDIGITAL_ATTRIBUTE_VTERM

Specific Attribute:

Numeric Value	1150011
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureVoltageLevels

Description:

Specifies the termination voltage the digital pattern instrument applies during non-drive cycles when the termination mode is set to V term. The instrument applies the termination voltage through a 50 Ω parallel termination resistance.

NIDIGITAL_ATTRIBUTE_TERMINATION_MODE

Specific Attribute:

Numeric Value	1150006
Datatype	ViInt32
Access	R/W
Applies to	Channel
Coercion	None
High-level Functions	niDigital_ConfigureTerminationMode

Description:

Specifies the behavior of the pin during non-drive cycles.

Defined Values:
NIDIGITAL_VAL_ACTIVE_LOAD (1200)	Specifies that, for non-drive pin states (L, H, X, V, M, E), the active load is connected and the instrument sources or sinks a defined amount of current to load the DUT. The amount of current sourced by the instrument and therefore sunk by the DUT is specified by IOL. The amount of current sunk by the instrument and therefore sourced by the DUT is specified by IOH. The voltage at which the instrument changes between sourcing and sinking is specified by VCOM.
NIDIGITAL_VAL_VTERM (1201)	Specifies that, for non-drive pin states (L, H, X, V, M, E), the pin driver terminates the pin to the configured VTERM voltage through a 50 Ω impedance. VTERM is adjustable to allow for the pin to terminate at a set level. This is useful for instruments that might operate incorrectly if an instrument pin is unterminated and is allowed to float to any voltage level within the instrument voltage range. To address this issue, enable VTERM by configuring the VTERM pin level to the desired voltage and selecting the VTERM termination mode. Setting VTERM to 0 V and selecting the VTERM termination mode has the effect of connecting a 50 Ω termination to ground, which provides an effective 50 Ω impedance for the pin. This can be useful for improving signal integrity of certain DUTs by reducing reflections while the DUT drives the pin.
NIDIGITAL_VAL_HIGH_Z (1202)	Specifies that, for non-drive pin states (L, H, X, V, M, E), the pin driver is put in a high-impedance state and the active load is disabled.

NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_IOL

Specific Attribute:

Numeric Value	1150012
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureActiveLoadLevels

Description:

Specifies the current that the DUT sinks from the active load while outputting a voltage below VCOM.

NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_IOH

Specific Attribute:

Numeric Value	1150013
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureActiveLoadLevels

Description:

Specifies the current that the DUT sources to the active load while outputting a voltage above VCOM.

NIDIGITAL_ATTRIBUTE_ACTIVE_LOAD_VCOM

Specific Attribute:

Numeric Value	1150014
Datatype	ViReal64
Access	R/W
Applies to	Channel
Coercion	Yes
High-level Functions	niDigital_ConfigureActiveLoadLevels

Description:

Specifies the voltage level at which the active load circuit switches between sourcing current and sinking current.