CS43L21 datasheet(45/63 Pages) CIRRUS

45 / 63 page

DS723A1

CS43L21

6.8

Beep Frequency & Timing Configuration (Address 12h)

Note: The DATA_SEL[1:0] bits in reg09h must be set to ‘01’b to enable function control in this register.

Beep Frequency (FREQ[3:0])

Default: 0000

Function:

The frequency of the beep signal can be adjusted from 260.87 Hz to 2181.82 Hz. Beep frequency will scale

directly with sample rate, Fs, but is fixed at the nominal Fs within each speed mode. Refer to Figure 10 on

page 26 for single, multiple and continuous beep configurations using the REPEAT and BEEP bits.

Beep On Time Duration (ONTIME[3:0])

Default: 0000

Function:

The on-duration of the beep signal can be adjusted from approximately 86 ms to 5.2 s. The on-duration will

scale inversely with sample rate, Fs, but is fixed at the nominal Fs within each speed mode. Refer to Figure

10 on page 26 for single-, multiple- and continuous-beep configurations using the REPEAT and BEEP bits.

432

FREQ3

FREQ2

FREQ1

FREQ0

ONTIME3

ONTIME2

ONTIME1

ONTIME0

FREQ[3:0]

Frequency

Fs = 12, 24, 48 or 96

kHz

Pitch

0000

260.87 Hz

0001

521.74 Hz

0010

585.37 Hz

0011

666.67 Hz

0100

705.88 Hz

0101

774.19 Hz

0110

888.89 Hz

0111

1000.00 Hz

1000

1043.48 Hz

1001

1200.00 Hz

1010

1333.33 Hz

1011

1411.76 Hz

1100

1600.00 Hz

1101

1714.29 Hz

1110

2000.00 Hz

1111

2181.82 Hz

TIME[3:0]

On Time

Fs = 12, 24, 48 or 96 kHz

0000

86 ms

···

1111

5.2 s

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