CS47L15 datasheet(66/279 Pages) CIRRUS

66 / 279 page

DS1137F2

CS47L15

4.3 Digital Core

Figure 4-26. Digital-Core Haptic Signal Generator

The hexadecimal number (0x06) in Fig. 4-26 indicates the corresponding x_SRCn setting for selection of the haptic signal

generator as an input to another digital-core function.

The haptic signal generator is selected as input to one of the digital-core output mixers by setting the x_SRCn field of the

applicable output mixer to 0x06.

The sample rate for the haptic signal generator is configured using the HAP_RATE field. See Table 4-22. Note that

sample-rate conversion is required when routing the haptic signal generator output to any signal chain that is configured

for a different sample rate.

The haptic signal generator is configured for an ERM or LRA actuator using the HAP_ACT bit. The required resonant

frequency is configured using the LRA_FREQ field. Note that the resonant frequency is only applicable to LRA actuators.

The signal generator can be enabled in continuous mode or configured for one-shot mode using the HAP_CTRL field, as

described in Table 4-22. In one-shot mode, the output is triggered by writing to the ONESHOT_TRIG bit.

In one-shot mode, the signal generator profile comprises the distinct phases (1, 2, 3). The duration and intensity of each

output phase is programmable.

In continuous mode, the signal intensity is controlled using the PHASE2_INTENSITY field only.

In the case of an ERM actuator (HAP_ACT = 0), the haptic output is a DC signal level, which may be positive or negative,

as selected by the x_INTENSITY fields.

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

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

motion of the haptic device.

Table 4-22. Haptic Signal Generator Control

Label

Default

Description

R144 (0x0090)

Haptics_Control_1

4ONESHOT_

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 (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.

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

Haptic Output

(0x06)

Haptic Signal

Generator

HAP_ACT

HAP_CTRL

ONESHOT_TRIG

LRA_FREQ

HAP_RATE

Digital Core Output Mixer

DAC

Output

Volume

Class D Speaker

Driver

DAC

OUTnxMIX_SRCn

OUTnxMIX_VOLn

Haptic

Device

CS47L15 датащи(PDF) 66 Page - Cirrus Logic

CS47L15 датащи(HTML) 66 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL