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WM8960 데이터시트(PDF) 39 Page - Wolfson Microelectronics plc

부품명 WM8960
상세설명  Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications
PDF  92 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8960 데이터시트(HTML) 39 Page - Wolfson Microelectronics plc

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Production Data
WM8960
w
PD, August 2013, Rev 4.2
39
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R40 (28h)
Left Speaker
Volume
6:0
SPKLVOL
[6:0]
0000000
(MUTE)
SPK_LP/SPK_LN Volume
1111111 = +6dB
… 1dB steps down to
0110000 = -73dB
0101111 to 0000000 = Analogue MUTE
7
SPKLZC
0
Left Speaker Zero Cross Enable
1 = Change gain on zero cross only
0 = Change gain immediately
8
SPKVU
0
Speaker Volume Update
0 = Store SPKLVOL in intermediate latch
(no gain change)
1 = Update left and right channel gains
(left = SPKLVOL, right = intermediate
latch)
R41 (29h)
Right Speaker
Volume
6:0
SPKRVOL
[6:0]
0000000
(MUTE)
SPK_RP/SPK_RN Volume
1111111 = +6dB
… 1dB steps down to
0110000 = -73dB
0101111 to 0000000 = Analogue MUTE
7
SPKRZC
0
Right Speaker Zero Cross Enable
1 = Change gain on zero cross only
0 = Change gain immediately
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.



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