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WM8960CGEFL/V 데이터시트(PDF) 42 Page - Cirrus Logic

부품명 WM8960CGEFL/V
상세설명  Speaker and Headphone Drivers for Portable Audio Applications
PDF  94 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8960CGEFL/V 데이터시트(HTML) 42 Page - Cirrus Logic

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WM8960
42
Rev 4.4
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
SPKVU
0
Speaker Volume Update
0 = Store SPKRVOL in intermediate
latch (no gain change)
1 = Update left and right channel gains
(left = intermediate latch, right =
SPKRVOL)
R51 (33h)
Class D
Control (3)
5:3
DCGAIN
[2:0]
000
(1.0x)
DC Speaker Boost (Boosts speaker DC
output level by up to 1.8 x on left and
right channels)
000 = 1.00x boost (+0dB)
001 = 1.27x boost (+2.1dB)
010 = 1.40x boost (+2.9dB)
011 = 1.52x boost (+3.6dB)
100 = 1.67x boost (+4.5dB)
101 = 1.8x boost (+5.1dB)
110 to 111 = Reserved
2:0
ACGAIN
[2:0]
000
(1.0x)
AC Speaker Boost (Boosts speaker AC
output signal by up to 1.8 x on left and
right channels)
000 = 1.00x boost (+0dB)
001 = 1.27x boost (+2.1dB)
010 = 1.40x boost (+2.9dB)
011 = 1.52x boost (+3.6dB)
100 = 1.67x boost (+4.5dB)
101 = 1.8x boost (+5.1dB)
110 to 111 = Reserved
Table 25 SPK_L/SPK_R Volume and Speaker Boost Control
To prevent pop noise, DCGAIN and ACGAIN should not be modified while the speaker outputs are
enabled.
To avoid clipping at speaker ground, ACGAIN should not be greater than DCGAIN.
To avoid clipping at speaker supply, SPKVDD1 and SPKVDD2 must be high enough to support the
peak output voltage when using DCGAIN and ACGAIN functions. The peak output voltage is
AVDD*(DCGAIN+ACGAIN)/2.
DCGAIN should normally be set to the same value as ACGAIN.
See "Volume Updates" for more information on volume update bits, zero cross and timeout operation.
See "Class D Speaker Outputs" for more information on class D speaker operation.
OUT3 OUTPUT
The OUT3 pin can drive a 16
 or 32 headphone or a line output or be used as a pseudo-ground for
capless headphone drive (see
“Headphone Output”). It can also drive out a mono mix of left and right
output mixers (See
“Output Signal Path”).



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