WM8955L Datasheet, PDF (3/43 Pages) Wolfson Microelectronics plc – STEREO DAC FOR PORTABLE AUDIO APPLICATIONS

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PIN DESCRIPTION
PIN #
1
2
3
4
5
6
7
8
9
NAME
MCLK
DCVDD
DBVDD
DGND
BCLK
DACDAT
DACLRC
CLKOUT
PLLGND
10
MONOOUT
11
OUT3
12
ROUT1
13
LOUT1
14
HPGND
15
ROUT2
16
LOUT2
17
HPVDD
18
AVDD
19
AGND
20
VREF
21
VMID
22
NC
23
HPDETECT
24
NC
25
MONOIN-
26
MONOIN+
27
LINEINR
28
LINEINL
29
MODE
30
CSB
31
SDIN
32
SCLK
WM8955L
TYPE
Digital Input
Supply
Supply
Supply
Digital Input / Output
Digital Input
Digital Input / Output
Digital Output
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Analogue Output
Analogue Output
Supply
Supply
Supply
Analogue Output
Analogue Output
No Connect
Logic Input
No Connect
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Digital Input
Digital Input
Digital Input/Output
Digital Input
DESCRIPTION
Master Clock
Digital Core Supply
Digital Buffer (I/O) Supply
Digital Ground (return path for both DCVDD and DBVDD)
Audio Interface Bit Clock
DAC Digital Audio Data
Audio Interface Left / Right Clock
Buffered Clock Output (from MCLK or internal PLL)
Internally connected to AGND. Connect this pin to AGND externally
for best PLL performance, or leave floating.
Mono Output
Output 3 (can be used as Headphone Pseudo Ground)
Right Output 1 (Line or Headphone)
Left Output 1 (Line or Headphone)
Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2)
Right Output 1 (Line or Headphone or Speaker)
Left Output 1 (Line or Headphone or Speaker)
Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2, MONOUT)
Analogue Supply
Analogue Ground (return path for AVDD)
Reference Voltage Decoupling Capacitor
Midrail Voltage Decoupling Capacitor
No Internal Connection
Headphone / Speaker switch (referred to AVDD)
No Internal Connection
Negative end of MONOIN+, for differential mono signals
Analogue Line-in to mixers (mono channel)
Analogue Line-in to mixers (right channel)
Analogue Line-in to mixers (left channel)
Control Interface Selection
Chip Select / Device Address Selection
Control Interface Data Input / 2-wire Acknowledge output
Control Interface Clock Input
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Product Preview Rev 0.4 May 2003
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