CS4207-CNZ Cirrus Logic Inc, CS4207-CNZ Datasheet - Page 137

• Manufacturer Part Number: CS4207-CNZ
• Description: IC Low Pwr,4/6 HD Aud Codec W/HP Amp
• Manufacturer: Cirrus Logic Inc
• Type: Audio Codecr

Specifications of CS4207-CNZ

• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 3
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 105 / 110
• Voltage - Supply, Analog: 2.97 V ~ 5.25 V
• Voltage - Supply, Digital: 2.97 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1796

DS880F1
7. APPLICATIONS
7.1
7.1.1
7.2
7.2.1
7.3
HD Audio Interface
Analog Outputs
Digital Mic Inputs
For each ADC, the data from the digital mic input pin widgets are multiplexed with the data from the analog
line/mic input pin widgets, and only one pin widget can be selected at any given time. Furthermore, the data
pins for the DMIC interface (DMIC_SDA1/2) are multiplexed with the GPIO0/1 pins and default to GPIO. In
order to successfully setup the data path for a digital microphone, the following steps have to be followed:
• a stream cannot contain channels that are not associated with any widget (unused channels), unless
• the same channel cannot be associated with more than one widget
Multi-Channel Streams
The CS4207 codec supports multi-channel streams (streams with sample blocks containing more than
two samples), on both inbound and outbound frames. Each of the 5 output converter widgets (DAC1/2/3,
S/PDIF TX 1/2) can be associated with an individual stream, or multiple widgets can be grouped to share
the same stream. A mix of shared and individual streams is also supported. Furthermore, the order in
which channels are assigned to each widget is not constrained by design. However, the following limita-
tions exist and must be avoided:
The same capabilities and limitations exist for the 3 input converter widgets (ADC1/2, S/PDIF RX). The
following table gives some examples of valid and invalid stream formats:
The curly brackets { } delineate each stream packet. The letters within curly brackets designate each
channel within that stream packet. For instance the sequence “{A, B, C, D} {E, F}” denotes two streams -
one stream consisting of 4 channels A-D and one stream consisting of 2 channels E-F.
Analog Supply Removal
In order to reduce audible artifacts, the analog reference is always powered up, even if the AFG has been
transition-ed into D3 state. For maximum power savings during D3, it may be desirable to completely re-
move the analog supplies on the system level. Doing so would cause an uncontrolled discharge of the
internal reference and hence audible artifacts, and must therefore be preceded with a controlled reference
ramp-down, which is initiated by setting the PDREF bit in the
of the
{A,B} {C,D} {E,F} {G,H} {I,J}
{A, B, C, D, E, F, G, H, I, J}
{A, B, C, D, E, F, G, H, I, J}
{A, B, C, D, E, F, G, H, I, J}
{A, B, C, D, E, F, G, H, I, J}
those channels appear last within the stream packet, after all other channels
{A, B, C, D} {E, F}
Vendor Processing Widget (Node ID =
Stream Format
{A, B} {C, D}
{A, B, C, D}
{A, B, C, D}
DAC1
A, B
G, H
A, B
A, B
A, B
A, B
A, B
-
-
DAC2
C, D
C, D
C, D
C, D
C, D
E, F
E, F
-
-
DAC3 SPDO1 SPDO2
C, D
A, B
G, H
E, F
E, F
E, F
E, F
11h).
-
-
C, D
G, H
G, H
G, H
A, B
I, J
I, J
-
-
C, D
A, B
I, J
I, J
DAC Configuration (CIR = 0003h)
-
-
-
-
-
indiv. streams, in-order assignment
shared stream, in-order assignment
mixed shared and indiv. streams
indiv. streams, out of order assignment
shared stream, out of order assignment
invalid: leading unused ch. (A, B)
invalid: intermittent unused ch. (C, D)
ok: trailing unused ch. (I, J)
invalid: ch. assigned to mult. widgets
comment
CS4207
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