OPTION

VALUE

OPAMP

- ENABLED to enable the OPAMP.

- DISABLED to disable the OPAMP.

TIME_BASE

Controls the maximum value of a counter that counts CLK_PER cycles to achieve a time interval equal to or larger than 1 μs. It should be written with one less than the number of CLK_PER cycles that are equal to or larger than 1 μs. This is used for the internal timing of the warm up and settling times.

INP_RANGE

Selects the op amp input voltage range.

- RAIL_TO_RAIL :   The op amp input voltage range is rail-to-rail

- REDUCED :  The op amp input voltage range and power consumption are reduced

OPAMPx_RUNMODE

Run in standby mode.

- DISABLED : the OPx is disabled when in standby sleep mode and its output driver is disabled.

- ENABLED : the OPx will continue operating as configured in standby sleep mode.

OPAMP0_ALWAYS_ON

Controls whether the OPAMP is always on or not.

- DISABLED : the OPx is not always on but can be enabled by the ENABLE EVENTx and disabled by the DISABLE EVENTx

- ENABLED : the OPx is always on

OPAMP0_EVENTS

Controls event reception and generation.

- DISABLED : No events are enabled for OPx

- ENABLED : All events are enabled for OPx

OPAMP0_OUTMODE

Selects the output mode for the output driver

- OFF : the output driver for OPx is disabled but this can overridden by the DRIVEx event

- NORMAL : the output driver for OPx is enabled in NORMAL mode

OPAMP0_MUXWIP

Multiplexer for wiper. Selects the resistor ladder wiper (potentiometer) position

- R1_15R_R2_1R : R1=15R , R2=1R

- R1_14R_R2_2R : R1=14R , R2=2R

- R1_12R_R2_4R : R1=12R , R2=4R

- R1_8R_R2_8R  : R1=8R  , R2=8R

- R1_6R_R2_10R : R1=6R , R2=10R

- R1_4R_R2_12R : R1=4R , R2=12R

- R1_2R_R2_14R : R1=2R , R2=14R

- R1_1R_R2_15R : R1=1R , R2=15R

OPAMP0_MUXBOT

Selects the analog signal connected to the bottom resistor in the resistor ladder

- OFF : multiplexer off

- INP : positive input pin for OPx

- INN : negative input pin for OPx

- DAC : DAC output (DAC and DAC output buffer must be enabled)

- LINKOUT : OPx-1 output. When selecting LINKOUT for OP0 MUXBOT is connected to the output of OP2

- GND : ground

OPAMP0_MUXTOP

Selects the analog signal connected to the top resistor in the resistor ladder

- OFF : multiplexer off

- OUT : OPx output

- VDD : VDD

OPAMP0_MUXNEG

Selects which analog signal is connected to the inverting(-) input of OPx

- INN : negative input pin for OPx

- WIP : wiper from OPx resistor ladder

- OUT : OPx output (unity gain)

- DAC : DAC output (DAC and DAC output buffer must be enabled)

OPAMP0_MUXPOS

Selects which analog signal is connected to the non inverting(+) input of OPx

- INP : positive input pin for OPx

- WIP : wiper from OPx resistor ladder

- DAC : DAC output (DAC and DAC output buffer must be enabled)

- GND : ground

- VDDDIV2 : VDD / 2

- LINKOUT : OPx-1 output. Only available for OP1 and OP2

- LINKWIP : wiper from OP0 resistor ladder. Setting only available for OP2

OPAMP0_SETTLE

Specifies the number of microseconds allowed for the opamp to settle. This value together with the value in TIME_BASE is used by an internal timer to determine when to generate the READYx event and set  the SETTLED flag in the OPx_STATUS register

OPAMP0_CAL

This value is a calibration value that adjusts the input offset voltage of the op amp. &H00 provides the most negative value of offset adjustment

&H80 provides no offset adjustment, and &HFF provides the most positive value of offset adjustment

REGMODE

- OVERWITE : the entire register is updated.

- PRESERVE : the register bits are preserved.

See also the AVRX topic.