AD1981BBSTZ datasheet(31/32 Pages) AD

tên linh kiện	AD1981BBSTZ

Giải thích chi tiết về linh kiện	AC 97 SoundMAX Codec

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AD1981B

Rev. C | Page 31 of 32

VENDOR ID REGISTERS

Index 0x7C–0x7E

Reg No.

Name

D15

D14

D13

D12

D11

D10

Default

0x7C

Vendor ID1

0x4144

S[7:0] This register is ASCII encoded to A.

F[7:0] This register is ASCII encoded to D.

Reg No.

Name

D15

D14

D13

D12

D11

D10

Default

0x7E

Vendor ID2

REV7

REV6

REV5

REV4

REV3

REV2

REV1

REV0

0x5374

T[7:0] This register is ASCII encoded to S.

REV[7:0] Vendor-specific revision number: The AD1981B assigns 0x74 to this field.

Table 44. Codec ID and External Clock Selection

ID1

ID0

Codec ID

Codec Clocking Source

(00) Primary

24.576 MHz

Local crystal or external into XTL_IN.

(01) Secondary

12.288 MHz

External into BIT_CLK.

(00) Primary

48.000 MHz

External into XTL_IN.

(00) Primary

14.31818 MHz

External into XTL_IN.

Internally, the ID pins have weak pull-ups and are inverted.

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