CS47L24 datasheet(76/256 Pages) CIRRUS

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CS47L24

Rev 4.1

For an LRA actuator (HAP_ACT = 1), the haptic output is an AC signal; selecting a negative signal level corresponds to a

180 degree phase inversion. In some applications, phase inversion may be desirable during the final phase, to halt the

physical motion of the haptic device.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R144

(0090h)

Haptics

Control 1

ONESHOT_TRIG

Haptic One-Shot Trigger

Writing ‘1’ starts the one-shot profile (i.e.,

Phase 1, Phase 2, Phase 3)

3:2

HAP_CTRL [1:0]

Haptic Signal Generator Control

00 = Disabled

01 = Continuous

10 = One-Shot

11 = Reserved

HAP_ACT

Haptic Actuator Select

0 = Eccentric Rotating Mass (ERM)

1 = Linear Resonant Actuator (LRA)

R145

(0091h)

Haptics

Control 2

14:0

LRA_FREQ

[14:0]

7FFFh

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 = 6.144MHz or

5.6448MHz, derived by division from

SYSCLK or ASYNCCLK.

If HAP_RATE<1000, then SYSCLK is the

clock source, and the applicable System

Clock frequency is determined by

SYSCLK.

If HAP_RATE>=1000, then ASYNCCLK is

the clock source, and the applicable

System Clock frequency is determined by

ASYNCCLK.

Valid for Haptic Frequency in the range

100Hz to 250Hz

For 6.144MHz System Clock:

77FFh = 100Hz

4491h = 175Hz

2FFFh = 250Hz

For 5.6448MHz System Clock:

6E3Fh = 100Hz

3EFFh = 175Hz

2C18h = 250Hz

R146

(0092h)

Haptics

phase 1

intensity

7:0

PHASE1_INTEN

SITY [7:0]

00h

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 degree phase shift.

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