CS43L21 datasheet(46/63 Pages) CIRRUS

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DS723A1

CS43L21

6.9

Beep Off Time & Volume (Address 13h)

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

Beep Off Time (OFFTIME[2:0])

Default: 000

Function:

The off-duration of the beep signal can be adjusted from approximately 75 ms to 680 ms. The off-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.

Beep Volume (BPVOL[4:0])

Default: 00000

Function:

The level of the beep into the output mixer can be adjusted in 2.0 dB increments from +12 dB to -50 dB.

Refer to Figure 10 on page 26 for single-, multiple- and continuous-beep configurations using the REPEAT

and BEEP bits. Levels are decoded as described in the table above.

543

OFFTIME2

OFFTIME1

OFFTIME0

BPVOL4

BPVOL3

BPVOL2

BPVOL1

BPVOL0

OFFTIME[2:0]

Off Time

Fs = 12, 24, 48 or

96 kHz

000

1.23 s

001

2.58 s

010

3.90 s

011

5.20 s

100

6.60 s

101

8.05 s

110

9.35 s

111

10.80 s

Binary Code

Volume Setting

00110

+12.0 dB

···

00000

0 dB

11111

-2 dB

11110

-4 dB

···

00111

-50 dB

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