CS4202 Datasheet, PDF (30/68 Pages) Cirrus Logic – Audio Codec 97 with headphone Amplifier

CS4202
4.12 Extended Audio ID Register (Index 28h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
ID1 ID0 0
0 REV1 REV0 AMAP 0
0
0 DSA1 DSA0 0 SPDIF 0 VRA
ID[1:0]
REV[1:0]
AMAP
DSA[1:0]
SPDIF
VRA
Default
Codec ID. These bits indicate the current codec configuration. When ID[1:0] = 00, the
CS4202 is the primary audio codec. When ID[1:0] = 01, 10, or 11, the CS4202 is a secondary
audio codec. The state of the ID[1:0] bits is determined at power-up from the ID[1:0]# pins
and the current clocking scheme, see Table 18 on page 49.
AC ’97 Revision. The REV[1:0] bits indicate which version of the AC ’97 specification the co-
dec complies with. These bits always return ‘01’, indicating the CS4202 complies with
version 2.2 of the AC ’97 specification.
Audio Slot Mapping. The AMAP bit indicates whether the AC ’97 2.2 compliant AC-link slot to
audio DAC mapping is supported. This bit always returns ‘1’, indicating that audio slot map-
ping is supported. The PCM playback and capture slots are mapped according to Table 8 on
page 30.
Slot Assignment
DSA1 DSA0
SPSA1 SPSA0
ASA1 ASA0
0
0
0
1
1
0
1
1
DAC
SDOUT
Slot Mapping
SDO2
S/PDIF
L
R
L
R
L
R
L
R
3
4
7
8
6
9
3
4
7
8
6
9 10 11 7
8
6
9 10 11
-
-
6
9
10 11 -
-
-
- 10 11
Table 8. Slot Mapping for the CS4202
ADC
L
R
3
4
7
8
6 11
-
-
DAC Slot Assignment. The DSA[1:0] bits control the mapping of output slots to the DAC/SRC
block as well as the serial data port. To satisfy AC ‘97 2.2 AMAP requirements, the default for
these bits will depend on the Codec ID as shown in Table 9. See Table 8 for all available Slot
Map settings.
Codec ID
0
1
2
3
DSA[1:0]
default
00
01
01
10
SPSA[1:0]
default
01
10
10
11
ASA[1:0]
default
00
00
00
00
Table 9. Slot Assignment Defaults
Sony/Philips Digital Interface. The SPDIF bit is ‘set’, indicating that the optional S/PDIF trans-
mitter is supported.
Variable Rate PCM Audio. The VRA bit indicates whether variable rate PCM audio is support-
ed. This bit always returns ‘1’, indicating that variable rate PCM audio is available.
x605h. The Extended Audio ID Register (Index 28h) is a read-only register, except for the
DSA[1:0] bits which are read/write.
30
DS549PP1