CS42L92 datasheet(76/333 Pages) CIRRUS

76 / 333 page

DS1162F2

CS42L92

4.3 Digital Core

4.3.12 PWM Generator

The CS42L92 incorporates two PWM signal generators as shown in Fig. 4-29. The duty cycle of each PWM signal can be

modulated by an audio source, or can be set to a fixed value using a control register setting.

A four-input mixer is associated with each PWM generator. The four input sources are selectable in each case, and

independent volume control is provided for each path.

PWM signal generators can be output directly on a GPIO pin. See Section 4.14 to configure a GPIO pin for this function.

Note that the PWM signal generators cannot be selected as input to the digital mixers or signal-processing functions within

the CS42L92 digital core.

R145 (0x0091)

Haptics_Control_2

14:0 LRA_

FREQ[14:0]

0x7FFF Haptic Resonant Frequency. Selects the haptic signal frequency (LRA actuator only,

HAP_ACT = 1)

Haptic Frequency (Hz) = System Clock/(2 x (LRA_FREQ+1)), where System Clock =

6.144 MHz or 5.6448 MHz, derived by division from SYSCLK or ASYNCCLK.

If HAP_RATE < 1000, SYSCLK is the clock source, and the applicable System Clock

frequency is determined by SYSCLK.

If HAP_RATE

 1000, ASYNCCLK is the clock source, and the applicable System Clock

frequency is determined by ASYNCCLK.

Valid for haptic frequency in the range 100–250 Hz

For 6.144-MHz System Clock:

0x77FF = 100 Hz

0x4491 = 175 Hz

0x2FFF = 250 Hz

For 5.6448-MHz System Clock:

0x6E3F = 100 Hz

0x3EFF = 175 Hz

0x2C18 = 250 Hz

R146 (0x0092)

Haptics_phase_1_

intensity

7:0 PHASE1_

INTENSITY[7:0]

0x00

Haptic Output Level (Phase 1). Selects the signal intensity of Phase 1 in one-shot mode.

Coded as 2’s complement. Range is ± Full Scale (FS).

For ERM actuator, this selects the DC signal level for the haptic output.

For LRA actuator, this selects the AC peak amplitude; negative values correspond to a

180° phase shift.

R147 (0x0093)

Haptics_Control_

phase_1_duration

8:0 PHASE1_

DURATION[8:0]

0x000 Haptic Output Duration (Phase 1). Selects the duration of Phase 1 in one-shot mode.

0x000 = 0 ms

0x001 = 0.625 ms

0x002 = 1.25 ms

… (0.625-ms steps)

0x1FF = 319.375 ms

R148 (0x0094)

Haptics_phase_2_

intensity

7:0 PHASE2_

INTENSITY[7:0]

0x00

Haptic Output Level (Phase 2)

Selects the signal intensity in Continuous mode or Phase 2 of one-shot mode.

Coded as 2’s complement. Range is ± Full Scale (FS).

For ERM actuator, this selects the DC signal level for the haptic output.

For LRA actuator, this selects the AC peak amplitude; Negative values correspond to a

180° phase shift.

R149 (0x0095)

Haptics_phase_2_

duration

10:0 PHASE2_

DURATION[10:0]

0x000 Haptic Output Duration (Phase 2). Selects the duration of Phase 2 in one-shot mode.

0x000 = 0 ms

0x001 = 0.625 ms

0x002 = 1.25 ms

… (0.625-ms steps)

0x7FF = 1279.375 ms

R150 (0x0096)

Haptics_phase_3_

intensity

7:0 PHASE3_

INTENSITY[7:0]

0x00

Haptic Output Level (Phase 3). Selects the signal intensity of Phase 3 in one-shot mode.

Coded as 2’s complement.

Range is ± Full Scale (FS).

For ERM actuator, this selects the DC signal level for the haptic output.

For LRA actuator, this selects the AC peak amplitude; Negative values correspond to a

180° phase shift.

R151 (0x0097)

Haptics_phase_3_

duration

8:0 PHASE3_

DURATION[8:0]

0x000 Haptic Output Duration (Phase 3). Selects the duration of Phase 3 in one-shot mode.

0x000 = 0 ms

0x001 = 0.625 ms

0x002 = 1.25 ms

… (0.625-ms steps)

0x1FF = 319.375 ms

R152 (0x0098)

Haptics_Status

ONESHOT_STS

Haptic One-Shot status

0 = One-Shot event not in progress

1 = One-Shot event in progress

Table 4-23. Haptic Signal Generator Control (Cont.)

Label

Default

Description

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