CS4294SLASHCS4298 datasheet(36/81 Pages) CIRRUS

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CS4205

DS489PP4

5.15

Extended Audio ID Register (Index 28h)

ID[1:0]

Codec ID. These bits indicate the current codec configuration. When ID[1:0] = 00, the

CS4205 is the primary audio codec. When ID[1:0] = 01, 10, or 11, the CS4205 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 27 on page 63.

AMAP

Audio Slot Mapping. The AMAP bit indicates whether the optional AC ’97 2.1 compliant

AC-link slot to audio DAC mapping is supported. This bit is a shadow of the AMAP bit in the

AC Mode Control Register (Index 5Eh). The PCM playback and capture slots are mapped ac-

cording to Table 14 on page 43.

VRM

Variable Rate Mic Audio. The VRM bit indicates whether variable rate Mic audio is supported.

This bit always returns ‘1’, indicating that variable rate mic audio is available.

VRA

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.

Default

x209h. The Extended Audio ID Register (Index 28h) is a read-only register.

D15

D14

D13

D12

D11

D10

ID1

ID0

AMAP

VRM

VRA

CS4294/CS4298 数据表(PDF) 36 Page - Cirrus Logic