WM9713L_06 WOLFSON [Wolfson Microelectronics plc], WM9713L_06 Datasheet - Page 50
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WM9713L_06
Manufacturer Part Number
WM9713L_06
Description
AC 97 Audio + Touchpanel CODEC
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM9713L_06.pdf
(108 pages)
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WM9713L
SPEAKER OUTPUTS – SPKL AND SPKR
w
Table 35 Mono PGA Control
The SPKL and SPKR (pins 35 and 36) are designed to drive a loudspeaker load down to 8
also be used as line outputs and headphone outputs. They are designed to drive an 8
coupled or in a BTL (capless) configuration. The available input sources are HPMIXL/R, SPKMIXL/R,
INV1/2 and Vmid (see Table 36).
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.
08h
MONO Vol
1Ch
Output PGA
Mux Select
REGISTER
REGISTER
ADDRESS
ADDRESS
7
6
5:0
13:11
10:8
BIT
BIT
MU
ZC
MONOVOL
SPKL
SPKR
LABEL
LABEL
1 (Mute)
0
000000
(0dB)
000
(Vmid)
000
(Vmid)
DEFAULT
DEFAULT
Mute MONO
1: Mute (OFF)
0: No Mute (ON)
Right zero cross enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
MONO Volume
000000: 0dB (maximum)
000001: -1.5dB
… (1.5dB steps)
011111: -46.5dB
1xxxxx: -46.5dB
SPKL input source select
000: Vmid
001: no input (tri-stated if SPKL=1 in
010: HPMIXL
011: SPKMIX
100: INV1
101-111: unused
SPKR input source select
000: Vmid
001: no input (tri-stated if SPKR=1 in
010: HPMIXR
011: SPKMIX
100: INV2
101-111: unused
register 3Eh)
register 3Eh)
DESCRIPTION
DESCRIPTION
PP Rev 3.0 June 2006
Pre-Production
load AC
and can
50
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