Instruction Manual

50 DS723F1

CS43L21

AOUTA (Address 16h) & AOUTB (Address 17h)

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

AOUTX Volume Control (AOUTX_VOL[7:0])

Default = 00h

Function:

The analog output levels can be adjusted in 0.5 dB increments from +12 to -102 dB as dictated by the DAC

Soft and Zero Cross bits (DACX_SZC[1:0]). Levels are decoded in unsigned binary as described in the table

above.

Note: When the limiter is enabled, the AOUT Volume is automatically controlled and should not be ad-

justed manually. Alternative volume control may be achieved using the PCMMIXx_VOL[6:0] bits.

6.13 PCM Channel Mixer (Address 18h)

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

Channel Mixer (PCMx[1:0] )

Default: 00

Function:

Implements mono mixes of the left and right channels as well as a left/right channel swap.

76543210

AOUTx_VOL7 AOUTx_VOL6 AOUTx_VOL5 AOUTx_VOL4 AOUTx_VOL3 AOUTx_VOL2 AOUTx_VOL1 AOUTx_VOL0

Binary Code Volume Setting

0001 1000 +12.0 dB

··· ···

0000 0000 0 dB

1111 1111 -0.5 dB

1111 1110 -1.0 dB

··· ···

0011 0100 -102 dB

··· ···

0001 1001 -102 dB

76543210

PCMA1 PCMA0 PCMB1 PCMB0 Reserved Reserved Reserved Reserved

PCMA[1:0] AOUTA PCMB[1:0] AOUTB

00 L 00 R

01 01

10 10

11 R 11 L

LR+

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LR+

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