infineon,autanalog-ctdac

Description

PSOC Edge AutAnalog CT DAC

Infineon PSOC Edge AutAnalog CT DAC (Continuous Time Digital-to-Analog Converter)

The CT DAC is a 12-bit continuous-time segmented DAC within the AutAnalog subsystem.
It supports multiple output topologies (direct, buffered internal, buffered external),
configurable voltage reference sources, and optional sample-and-hold operation.

The driver exposes:
  - FW channel (#15): Direct value writes via the standard Zephyr DAC API.
    This is the default channel for simple DAC output (channel 15).
  - Waveform channels (#0-#14): Autonomous waveform output via the AC state
    machine. Channel IDs 0-14 map directly to DAC hardware channels 0-14.
    These use look-up table (LUT) ranges configured via child nodes and
    waveform data loaded at runtime.

The AutAnalog CT DAC is part of the AutAnalog subsystem, which must be set up
before initializing the CTDAC.

Properties

Top level properties

These property descriptions apply to “infineon,autanalog-ctdac” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

#io-channel-cells

int

 
Number of cells in an io-channel specifier.

This property is required.

Constant value: 1

clk-dst

int

 
Peripheral clock destination ID for this CTDAC instance.

This property is required.

vref-source

int

 
Selects the reference voltage source for the DAC.
Use IFX_AUTANALOG_CTDAC_VREF_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_VREF_VDDA     (0x100) - Vdda supply (1.8V typical)
  IFX_AUTANALOG_CTDAC_VREF_VBGR     (0)     - Band-gap reference (0.9V typical)
  IFX_AUTANALOG_CTDAC_VREF_CTB0_OA0 (1)     - CTB0 opamp 0 output
  IFX_AUTANALOG_CTDAC_VREF_CTB0_OA1 (2)     - CTB0 opamp 1 output
  IFX_AUTANALOG_CTDAC_VREF_CTB1_OA0 (3)     - CTB1 opamp 0 output
  IFX_AUTANALOG_CTDAC_VREF_CTB1_OA1 (4)     - CTB1 opamp 1 output
  IFX_AUTANALOG_CTDAC_VREF_PRB_OUT0 (6)     - PRB Vref0
  IFX_AUTANALOG_CTDAC_VREF_PRB_OUT1 (7)     - PRB Vref1

Default value: 0x100

Legal values: 0x100, 0, 1, 2, 3, 4, 6, 7

topology

int

 
Selects the DAC output topology.
Use IFX_AUTANALOG_CTDAC_TOPO_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_TOPO_DIRECT            (0) - Direct output
  IFX_AUTANALOG_CTDAC_TOPO_DIRECT_TRACK_CAP  (1) - Direct with track capacitor
  IFX_AUTANALOG_CTDAC_TOPO_DIRECT_TRACK_HOLD (2) - Direct with track and hold capacitors
  IFX_AUTANALOG_CTDAC_TOPO_BUFFERED_INTERNAL (3) - Buffered, internal connections only
  IFX_AUTANALOG_CTDAC_TOPO_BUFFERED_EXTERNAL (4) - Buffered, internal and external

Default value: 4

Legal values: 0, 1, 2, 3, 4

ref-buf-pwr

int

 
Power mode for the reference voltage buffer.
Use IFX_AUTANALOG_CTDAC_REF_BUF_PWR_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_OFF             (0)  - Buffer OFF
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_ULTRA_LOW       (1)  - 15uA, 30kHz GBW
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_ULTRA_LOW_RAIL  (2)  - Charge pump ON, 35uA, 30kHz GBW
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_LOW_RAIL        (4)  - Charge pump ON, 150uA, 350kHz GBW
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_MEDIUM_RAIL     (6)  - Charge pump ON, 200uA, 700kHz GBW
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_HIGH            (7)  - 400uA, 1.75MHz GBW (Vref <= 0.9V)
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_HIGH_RAIL       (8)  - Charge pump ON, 600uA, 1.75MHz GBW
  IFX_AUTANALOG_CTDAC_REF_BUF_PWR_ULTRA_HIGH_RAIL (10) - Charge pump ON, 800uA, 2.8MHz GBW
Set to OFF (0) when vref-source is "vdda", since the Vdda path does not
use the reference buffer.

Default value: 0

Legal values: 0, 1, 2, 4, 6, 7, 8, 10

out-buf-pwr

int

 
Power mode for the output voltage buffer.
Use IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_OFF             (0)  - Buffer OFF
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_ULTRA_LOW       (1)  - 15uA, drive 10uA
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_ULTRA_LOW_RAIL  (2)  - Charge pump ON, 35uA, drive 10uA
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_LOW_RAIL        (4)  - Charge pump ON, 150uA, drive 100uA
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_MEDIUM_RAIL     (6)  - Charge pump ON, 200uA, drive 1mA
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_HIGH_RAIL       (8)  - Charge pump ON, 600uA, drive 1mA
  IFX_AUTANALOG_CTDAC_OUT_BUF_PWR_ULTRA_HIGH_RAIL (10) - Charge pump ON, 800uA, drive 10mA
Must be non-OFF when topology is "buffered-internal" or "buffered-external".

Default value: 0

Legal values: 0, 1, 2, 4, 6, 8, 10

lp-mode

boolean

 
Request Low Power (LP) operation for the AutAnalog subsystem.
When set, the parent AutAnalog MFD basic-mode STT enters LP operation
for the AC states. LP mode is also activated if any other AutAnalog
child peripheral (SAR ADC, CTB, PTCOMP, PRB) sets lp-mode.
In advanced mode (ac-states), use the per-state ac-lp-mode property
instead.

lp-div-dac

int

 
Low-power clock divider for the DAC. The actual divisor applied by
the hardware is (lp-div-dac + 1). Valid range: 0..1023.

Default value: 0

bottom-sel

boolean

 
R-2R ladder bottom connection selector. When set, the bottom end
of the R-2R resistor ladder is connected to Vref instead of Vssa.

disabled-mode

boolean

 
DAC output behavior when disabled. When set, the output drives
Vssa or Vref (depending on bottom-sel) when the output is disabled.
Otherwise the output is tri-stated.

deglitch

boolean

 
Enable the de-glitch functionality. When enabled, a switch on the output
path blanks glitches during code transitions.

deglitch-time

int

 
De-glitch time in DAC clock cycles (actual value = deglitch-time + 1).
Only used when deglitch is enabled. Range 0..255.

Default value: 0

sign

boolean

 
When set, the DAC input data is interpreted as a signed 12-bit value
(two's complement). Otherwise unsigned.

sample-time

int

 
Sample time in DAC clock cycles. Range 0..255.
The actual sample time used by the hardware is (sample-time + 1).

Default value: 0

step-val

array

 
Step values for waveform address increment. Array of exactly 3
values (step-val[0], step-val[1], step-val[2]). Each waveform
channel selects one via its step-sel property.

Default value: [0, 0, 0]

limit-cfg-0

array

 
Range detection configuration for limit slot 0.
Three-cell array: <condition low-threshold high-threshold>.
Use IFX_AUTANALOG_CTDAC_LIMIT_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h> for the condition:
  IFX_AUTANALOG_CTDAC_LIMIT_BELOW   (0) - Value < low
  IFX_AUTANALOG_CTDAC_LIMIT_INSIDE  (1) - low <= Value < high
  IFX_AUTANALOG_CTDAC_LIMIT_ABOVE   (2) - Value > high
  IFX_AUTANALOG_CTDAC_LIMIT_OUTSIDE (3) - Value < low OR Value >= high
Waveform channels reference this slot via stat-sel = <1>.

limit-cfg-1

array

 
Range detection configuration for limit slot 1.
Same format as limit-cfg-0. Referenced via stat-sel = <2>.

limit-cfg-2

array

 
Range detection configuration for limit slot 2.
Same format as limit-cfg-0. Referenced via stat-sel = <3>.

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “infineon,autanalog-ctdac” compatible.

Name

Type

Details

reg

array

 
Base address offset of the CTDAC within the AutAnalog subsystem.

This property is required.

See Important properties for more information.

clocks

phandle-array

 
Phandle to the peripheral clock divider node (infineon,peri-div) that
provides the CTDAC peripheral clock. The divider is in PERI0 group 2
(CLK_HF9). Each CTDAC instance needs its own divider channel:
  DAC0 -> PCLK_PASS_CLOCK_DAC0 (peri0, group 2, index 0)
  DAC1 -> PCLK_PASS_CLOCK_DAC1 (peri0, group 2, index 1)

This property is required.

status

string

 
Indicates the operational status of the hardware or other
resource that the node represents. In particular:

  - "okay" means the resource is operational and, for example,
    can be used by device drivers
  - "disabled" means the resource is not operational and the system
    should treat it as if it is not present

For details, see "2.3.4 status" in Devicetree Specification v0.4.

Legal values: okay, disabled, reserved, fail, fail-sss

See Important properties for more information.

compatible

string-array

 
This property is a list of strings that essentially define what
type of hardware or other resource this devicetree node
represents. Each device driver checks for specific compatible
property values to find the devicetree nodes that represent
resources that the driver should manage.

The recommended format is "vendor,device", The "vendor" part is
an abbreviated name of the vendor. The "device" is usually from
the datasheet.

The compatible property can have multiple values, ordered from
most- to least-specific. Having additional values is useful when the
device is a specific instance of a more general family, to allow the
system to match the most specific driver available.

For details, see "2.3.1 compatible" in Devicetree Specification v0.4.

This property is required.

See Important properties for more information.

reg-names

string-array

 
Optional names given to each register block in the "reg" property.
For example:

  / {
       soc {
           #address-cells = <1>;
           #size-cells = <1>;

           uart@1000 {
               reg = <0x1000 0x2000>, <0x3000 0x4000>;
               reg-names = "foo", "bar";
           };
       };
  };

The uart@1000 node has two register blocks:

  - one with base address 0x1000, size 0x2000, and name "foo"
  - another with base address 0x3000, size 0x4000, and name "bar"

interrupts

array

 
Information about interrupts generated by the device, encoded as an array
of one or more interrupt specifiers. The format of the data in this property
varies by where the device appears in the interrupt tree. Devices with the same
"interrupt-parent" will use the same format in their interrupts properties.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

See Important properties for more information.

interrupts-extended

compound

 
Extended interrupt specifier for device, used as an alternative to
the "interrupts" property.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

interrupt-names

string-array

 
Optional names given to each interrupt generated by a device.
The interrupts themselves are defined in either "interrupts" or
"interrupts-extended" properties.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

interrupt-parent

phandle

 
If present, this refers to the node which handles interrupts generated
by this device.

For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.

label

string

 
Human readable string describing the device. Use of this property is
deprecated except as needed on a case-by-case basis.

For details, see "4.1.2 Miscellaneous Properties" in Devicetree
Specification v0.4.

See Important properties for more information.

clock-names

string-array

 
Optional names given to each clock provider in the "clocks" property.

#address-cells

int

 
This property encodes the number of <u32> cells used by address fields
in "reg" properties in this node's children.

For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.

#size-cells

int

 
This property encodes the number of <u32> cells used by size fields in
"reg" properties in this node's children.

For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.

dma-coherent

boolean

 
Indicates that the device is capable of coherent DMA operations.

For details, see "2.3.10 dma-coherent" in Devicetree Specification v0.4.

dmas

phandle-array

 
DMA channel specifiers relevant to the device.

dma-names

string-array

 
Optional names given to the DMA channel specifiers in the "dmas" property.

io-channels

phandle-array

 
IO channel specifiers relevant to the device.

io-channel-names

string-array

 
Optional names given to the IO channel specifiers in the "io-channels" property.

mboxes

phandle-array

 
Mailbox / IPM channel specifiers relevant to the device.

mbox-names

string-array

 
Optional names given to the mbox specifiers in the "mboxes" property.

power-domains

phandle-array

 
Power domain specifiers relevant to the device.

power-domain-names

string-array

 
Optional names given to the power domain specifiers in the "power-domains" property.

#power-domain-cells

int

 
Number of cells in power-domains property

hwlocks

phandle-array

 
HW spinlock id relevant to the device.

hwlock-names

string-array

 
Optional names given to the hwlock specifiers in the "hwlocks" property.

zephyr,deferred-init

boolean

 
Do not initialize device automatically on boot. Device should be manually
initialized using device_init().

wakeup-source

boolean

 
Property to identify that a device can be used as wake up source.

When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.

Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.

zephyr,pm-device-runtime-auto

boolean

 
Automatically configure the device for runtime power management after the
init function runs.

zephyr,disabling-power-states

phandles

 
List of power states that will disable this device power.

Child node properties

Name

Type

Details

start-addr

int

 
Start address in the DAC look-up table (0..511).
Required for waveform channels (reg 0-14).

end-addr

int

 
End address in the DAC look-up table (0..511).
Must be >= start-addr. Required for waveform channels (reg 0-14).

op-mode

int

 
Waveform operating mode for this channel.
Use IFX_AUTANALOG_CTDAC_OP_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_OP_OS_ONE_QUAD    (0) - One-shot, one quadrant
  IFX_AUTANALOG_CTDAC_OP_OS_TWO_QUAD    (1) - One-shot, two quadrant
  IFX_AUTANALOG_CTDAC_OP_OS_FOUR_QUAD   (2) - One-shot, four quadrant
  IFX_AUTANALOG_CTDAC_OP_CONT_ONE_QUAD  (3) - Continuous, one quadrant
  IFX_AUTANALOG_CTDAC_OP_CONT_TWO_QUAD  (4) - Continuous, two quadrant
  IFX_AUTANALOG_CTDAC_OP_CONT_FOUR_QUAD (5) - Continuous, four quadrant
  IFX_AUTANALOG_CTDAC_OP_ADDR           (6) - External address mode
  IFX_AUTANALOG_CTDAC_OP_DATA           (7) - External data mode

Default value: 3

Legal values: 0, 1, 2, 3, 4, 5, 6, 7

sample-and-hold

boolean

 
Enable sample-and-hold for this channel.

step-sel

int

 
Step value selector for address increment.
Use IFX_AUTANALOG_CTDAC_STEP_SEL_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_STEP_SEL_DISABLED (0) - Step value is 1 (default)
  IFX_AUTANALOG_CTDAC_STEP_SEL_0        (1) - Use stepVal[0]
  IFX_AUTANALOG_CTDAC_STEP_SEL_1        (2) - Use stepVal[1]
  IFX_AUTANALOG_CTDAC_STEP_SEL_2        (3) - Use stepVal[2]

Default value: 0

Legal values: 0, 1, 2, 3

stat-sel

int

 
Range detection / status selector.
Use IFX_AUTANALOG_CTDAC_STAT_SEL_* constants from
<dt-bindings/dac/infineon-autanalog-ctdac.h>.
  IFX_AUTANALOG_CTDAC_STAT_SEL_DISABLED (0) - No range validation
  IFX_AUTANALOG_CTDAC_STAT_SEL_0        (1) - Use chLimitCfg[0]
  IFX_AUTANALOG_CTDAC_STAT_SEL_1        (2) - Use chLimitCfg[1]
  IFX_AUTANALOG_CTDAC_STAT_SEL_2        (3) - Use chLimitCfg[2]

Default value: 0

Legal values: 0, 1, 2, 3

reg

array

 
Channel identifier.

This property is required.

See Important properties for more information.

zephyr,resolution

int

 
DAC resolution to be used for the channel.

zephyr,buffered

boolean

 
Enable output buffer for the channel.

zephyr,internal

boolean

 
Enable internal output path for the channel.

zephyr,vref-mv

int

 
This property can be used to specify the voltage (in millivolts)
of the reference selected for this channel, so that applications
can get that value if needed for some calculations.

Specifier cell names

  • io-channel cells: output