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WM9714LGEFL/V Datasheet(PDF) 47 Page - Wolfson Microelectronics plc

Part # WM9714LGEFL/V
Description  AC 97 Audio CODEC
PDF  94 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9714LGEFL/V Datasheet(HTML) 47 Page - Wolfson Microelectronics plc

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Pre-Production
WM9714L
w
PP Rev 3.0 June 2006
47
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
7
MU
1 (Mute)
Mute MONO
1: Mute (OFF)
0: No Mute (ON)
6
ZC
0
Right zero cross enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
08h
MONO Vol
5:0
MONOVOL
000000
(0dB)
MONO Volume
000000: 0dB (maximum)
000001: -1.5dB
… (1.5dB steps)
011111: -46.5dB
1xxxxx: -46.5dB
Table 35 Mono PGA Control
SPEAKER OUTPUTS – SPKL AND SPKR
The SPKL and SPKR (pins 35 and 36) are designed to drive a loudspeaker load down to 8
Ω and can
also be used as line outputs and headphone outputs. They are designed to drive an 8
Ω load AC
coupled or in a BTL (capless) configuration. The available input sources are HPMIXL/R, SPKMIXL/R,
INV1/2 and Vmid (see Table 36).
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
13:11
SPKL
000
(Vmid)
SPKL input source select
000: Vmid
001: no input (tri-stated if SPKL=1 in
register 3Eh)
010: HPMIXL
011: SPKMIX
100: INV1
101-111: unused
1Ch
Output PGA
Mux Select
10:8
SPKR
000
(Vmid)
SPKR input source select
000: Vmid
001: no input (tri-stated if SPKR=1 in
register 3Eh)
010: HPMIXR
011: SPKMIX
100: INV2
101-111: unused
Table 36 SPKL / SPKR PGA Input Source
The signal volume on SPKL and SPKR can be independently adjusted under software control by
writing to register 02h.
When not in use SPKL and SPKR can be powered down using the Powerdown register bits SPKL
and SPKR (register 3Eh, bits [8:7]). To minimise pops and clicks when the PGA is powered down /
up it is recommended that the Vmid input is selected during the power down / up cycle. This ensures
the same DC level is maintained on the output pin throughout.



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