CS43L43

DS479PP3

11

3.6.4 Auxilliary Mute Control

neous audible artifacts on the headphone outputs during power-up. For these applications, an option-

al external mute can be used to maintain an absolute minimum of extraneous clicks and pops. Please

see Figures 6 and 7 for the suggested headphone mute circuit.

The Mute Control will need to be generated externally from a DSP or Microcontroller. See Figure 7

for /RST and Mute Control timing.

H eadphones

T he M otorola M O SFET s show n have been

tested to w ork properly, how ever, an

equivalent device m ay be used.

M G S F1N H 02E LT

2 2 0uF

47u H

1k

16

100K

M G S F1N H 02E LT

2 2 0uF

47u H

1k

16

From C S 43L43 P in

1 4 (H P _B )

From C S 43L43 P in

1 0 (H P _A )

M ute C ontrol from uC or D S P

Figure 6. Optional Headphone Mute Circuit

~ 300 m s e c

~ 900 m s e c

H eadphone O utput at

pin of part

/R S T

M ute C ontrol from

D SP or

M icroC ontroller

Figure 7. Timing for Headphone Mute