Pre-Production
WM8850
NODE LIST
A summary of the capabilities of each node is given in Table 3 below:
NID
NAME
WIDGET TYPE
DESCRIPTION
00h
01h
Root
AFG
Root
Provides Vendor ID, Device ID, and NID of the AFG.
Audio Function Group
Audio Input Converter
Audio Input Converter
Audio Output Converter
Provides the number of Widget Nodes, and NID of first
Widget Node. Describes CODEC Audio capabilities.
02h
03h
04h
ADC1
Supports sample rates from 8kHz to 96kHz, and sample
sizes from 16-bits to 24-bits.
MIC1
Supports sample rates from 8kHz to 48kHz, and sample
sizes from 16-bits to 24-bits.
S/PDIF Tx 1
Supports sample rates from 32kHz to 192kHz, and
sample sizes from 16-bits to 32-bits. Includes a fully
asynchronous SRC.
05h
06h
S/PDIF Rx
DAC1
Audio Input Converter
Audio Output Converter
As S/PDIF Tx 1, plus error detection.
Supports sample rates from 8kHz to 192kHz, and
sample sizes from 16-bits to 24-bits. Supports digital
attenuation from 0dB to -63.5 dB in 0.5 dB steps.
07h
08h
09h
DAC2
Audio Output Converter
Audio Output Converter
Audio Selector
As DAC1.
As DAC1.
DAC3
MIC1 Mux
Selects between Digital Mic (Port-D), and Analogue Mic
(Port-B).
0Ah
PGA1
Audio Selector
Supports a gain range of -12dB to +12 dB in 0.5dB
steps.
0Bh
0Ch
0Dh
PGA2
Port-E
Port-B
Selector
As PGA1.
Pin Complex
Pin Complex
Line Input (VIN1) with presence detection.
Analogue Mic Input (VIN2) with pre-amplifier (0dB,
+10dB, +20dB, +30dB), configurable VREF, presence
detection and custom impedance sensing scheme.
0Eh
Port-D
Pin Complex
Digital Mic Input (DMIC1) with gain (-12dB to +32dB in
0.5dB steps).
0Fh
10h
S/PDIF Out
S/PDIF In
Pin Complex
Pin Complex
S/PDIF Output with presence detection.
S/PDIF Input with presence detection(Note 1) plus lock and
rate detection.
11h
Port-A
Pin Complex
Ground-referenced headphone/line out (VOUT1) with
presence detection.
12h
13h
14h
Port-G
Port-F
Beep
Pin Complex
Pin Complex
Beep Generator
Differential line out (VOUT2) with presence detection.
Differential line out (VOUT3) with presence detection.
Generates a configurable tone that can be muxed into
DAC audio paths. Supports a gain range 0dB to -24dB in
6dB steps.
15h
16h
17h
MIC2
Audio Input Converter
Pin Complex
Supports sample rates from 8kHz to 48kHz, and sample
sizes from 16-bits to 24-bits.
Port-H
Digital Mic Input (DMIC2) with gain (-12 dB to 32dB in
0.5 dB steps). Output port for S/PDIF Tx 2.
S/PDIF Tx 2
Audio Output Converter
Supports sample rates from 32kHz to 192kHz, and
sample sizes from 16-bits to 32-bits.
Table 3 Node List
Notes:
1. The Pin Sense Verb in the SPDIF_IN node does not convey presence detect information, and is used to convey the
status of the SPDIF Rx Lock flag.
2. All Widget Nodes are as defined in the HDA specification; there are no vendor defined widgets.
PP, April 2011, Rev 3.2
35
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
