wm9001 Wolfson Microelectronics plc, wm9001 Datasheet - Page 20

• Manufacturer Part Number: wm9001
• Description: 1w Dual-mode Class Ab/d Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

WM9001
w
TYPICAL USAGE WITH WM8991 CODEC
The WM9001 may be used in conjunction with a CODEC such as the WM8991 to provide a complete
stereo solution. Such a solution allows the left and right drivers to be positioned separately as close
to the speakers as possible, minimising EMI emissions from long speaker cables.
In this configuration the EN & SYNC pins may be driven from GPIO outputs from the WM8991, and,
providing that the WM8991 and WM9001 are connected to the same analogue supply (AVDD), then
DC blocking capacitors are not required on the LIP and LIN inputs to WM9001.
Figure 10 Operation of WM9001 in Conjunction with WM8991
The EN and SYNC pins are compatible with low voltage (eg. 1.8v) logic levels from external devices,
and can accept logic 1 digital inputs as low as 1.6V, even though the WM9001 AVDD supply
minimum is 2.7V. This provides compatibility with a low voltage DVDD on a controlling device such
as the WM8991 CODEC.
LIN3/GPI7
RIN3/GPI8
RIN4/RXP
MICBIAS
LIN4/RXN
LIN2
RIN1
RIN2
LIN1
-12dB to +6dB
-12dB to +6dB
-12dB to +6dB
-12dB to +6dB
MICBIAS Current Detect
-16.5dB to +30dB, 0.75dB steps
INPUT PGAs
-
+
-
+
-
+
-
+
RIN12
-16.5dB to +30dB, 0.75dB steps
LIN12
-16.5dB to +30dB, 0.75dB steps
LIN34
-16.5dB to +30dB, 0.75dB steps
RIN34
en
-
+
-
+
50k
250k
RXVOICE
RXVOICE
5k
250k
50
5k
k
DIFFINL
DIFFINR
V
REF
-12dB to +6dB
-12dB to +6dB
-12dB to +6dB
-12dB to +6dB
0dB, +30dB
0dB, +30dB
-
+
+
-
0dB, +30dB
0dB, +30dB
INPUT MIXERS
INMIXR
Record R
INMIXL
Record L
+
+
AVDD
AINRMUX
AINLMUX
POR
DCVDD
Left Line Input to Speaker
Rx Voice -
Left Line Input to Left Output Mixer
Left MIC
Left ADC Bypass
Right ADC Bypass
Right MIC
Right Line Input to Right Output Mixer
Rx Voice +
Right Line Input to Speaker
ADC L
ADC R
POR
(Voice or Hi-
HIGH PASS
(Voice or Hi-
HIGH PASS
FILTER
FILTER
Fi)
Fi)
-71.625dB to
+17.625dB,
0.375dB
steps
-71.625dB to
+17.625dB,
0.375dB steps
-36dB to 0dB,
3dB steps
DIGITAL AUDIO
A-law and u-law support
INTERFACE
TDM Support
DIGITAL CORE
0
0
SYNC
+
+
-71.625dB to 0dB,
0.375dB steps
-71.625dB to 0dB,
0.375dB steps
0dB,
+6dB,
+12dB,
+18dB
MON
MIX
O
Alternative DAC Interface
Alternative MCLK
Button Control / Accessory Detect
Clock Output
Inverted ADCLRC
+
EN
GPIO
DAC L
DAC R
MCLK2
MCLK
INP_SEL
VMID
LIN
LIP
AVDD
AGN
D
DIFFERENTIAL RIGHT CHANNEL SPEAKER OUTPUT
PLL
EN
R ADC Bypass
L ADC Bypass
R ADC Bypass
L ADC Bypass
-12dB to 0dB,
-12dB to 0dB,
3dB steps
OUTPUT MIXERS
3dB steps
DCGAIN
DAC L
DAC R
L MIC
R MIC
L MIC
R MIC
RIN3
RIN3
ACGAIN & DCGAIN
LIN3
LIN3
SET BY H/W
AVDD
LOMIX
ROMIX
OUTPUT POWER
BOOST SELECT
SYSCLK
BSEL[2:0]
+
+
AGND
-73dB to +6dB,
-73dB to +6dB,
INTERFACE
SUPPRESSION
CONTROL
LOPGA
ROPGA
1dB steps
1dB steps
RF NOISE
ACGAIN
ACGAIN
SET BY H/W
CDMODE
Inverted Out R
Inverted Out L
CDMODE
Mixer L
Mixer R
Mixer L
Mixer L
Mixer L
Mixer R
Mixer R
Mixer R
Mixer L
Mixer R
MIC R
DAC L
DAC R
MIC L
MIC L
MIC R
D / AB Select
RXN
RIN2
LADC
bypass
LIN2
RADC
bypass
RXP
SHUTDOWN
OUT4MIX
THERMAL
LONMIX
OUT3MIX
RONMIX
OSCILLATOR
LOPMIX
ROPMIX
ENABLE
DEVICE
SPKMIX
+
+
+
+
+
+
PP, June 2009, Rev 3.2
+
+
CLASS AB/D
SPEAKER DRIVER
-
EN
SPKVDD SPKGND
-6dB,
-12dB
0dB,
-73dB to +6dB, 1dB steps
-73dB to +6dB, 1dB steps
SUPPRESSION
POP/CLICK
SYNC
-73dB to +6dB,
SPKPGA
0dB, -6dB
0dB,
-6dB
1dB steps
0dB, -6dB
Line
Line
0dB, -6dB
Line
Line
HP
HP
HP
HP
1xVMID,
1.27xVMID,
1.4xVMID,
1.52xVMID,
1.67xVMID
1.8xVMID
CLOCK
DETECT
SP
K
1x,
1.27x
,
1.4x,
1.52x
,
1.67x
1.8x
Pre-Production
SPKP
SPKN
LON
LOP
OUT3
LOUT
SPKN
SPKP
ROUT
OUT4
ROP
RON
SPEAKER OUTPUT
LEFT CHANNEL
ACGAIN & DCGAIN
REGISTERS
SET BY
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