tfa9879hn NXP Semiconductors, tfa9879hn Datasheet - Page 33

• Manufacturer Part Number: tfa9879hn
• Description: Mono Btl Class-d Audio Amplifier For Portable Applications With Digital Input
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TFA9879_1
Preliminary data sheet
10.4.8 Volume control
10.4.9 De-emphasis, soft/hard mute and power limiter
Table 31.
Table 32.
Bit
15:13 reserved
12
11:8
7:0
Bit
15:12 reserved
11:10 DE_PHAS
9
8
7:0
ZR_CRSS
reserved
VOL
S_MUTE
P_LIM
Symbol
Symbol
H_MUTE
Volume control register (address 13h) bit description
De-emphasis, soft/hard mute and power limiter control register (address 14h) bit
description
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Access
R/W
R/W
R/W
Access Default
R/W
R/W
R/W
R/W
Rev. 01 — 8 April 2010
0000
00
0
0
0xBD
000
1
0xBD
Default
0000
Mono BTL class-D audio amplifier with digital input
Description
de-emphasis settings,
configuration for four sample rates as a function of the
value of DE_PHASE
hard mute:
soft mute; default value:
power limiter control settings; see
suppressions factors as a function of the value of P_LIM
Description
volume update at zero crossing audio stream:
volume control; see
suppression factors as a function of the value of bits
VOL
0: no hard mute; default value
1: hard mute enabled; implemented by PWM signal
with 50% duty-cycle
0: soft mute disabled using raised cosine
1: soft mute enabled using raised cosine
0: zero-crossing volume control disabled
1: zero-crossing volume control enabled; default
value
Table 10
seeTable 6
for the amplification and
for the de-emphasis
Table 13
TFA9879
© NXP B.V. 2010. All rights reserved.
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