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WM8960CGEFL/V データシート(PDF) 39 Page - Wolfson Microelectronics plc

部品番号 WM8960CGEFL/V
部品情報  Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications
PDF  91 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8960CGEFL/V データシート(HTML) 39 Page - Wolfson Microelectronics plc

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Production Data
WM8960
w
PD, October 2011, Rev 4.1
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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