ADSP-1981BL Datasheet, PDF (31/32 Pages) Analog Devices – AC 97 SoundMAX Codec

AD1981BL
VENDOR ID REGISTERS
Index 0x7C–0x7E
Reg No.
0x7C
Name
Vendor ID1
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
F7
F6
F5
F4
F3
F2
F1 F0 S7 S6 S5 S4 S3 S2 S1 S0 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 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
0x7E
Vendor ID2 T7 T6 T5 T4 T3 T2 T1 T0 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 AD1981BL assigns 0x74 to this field.
Table 44. Codec ID and External Clock Selection
ID1
ID0
Codec ID
1
1
(00) Primary
1
0
(01) Secondary
0
1
(00) Primary
0
0
(00) Primary
Internally, the ID pins have weak pull-ups and are inverted.
Codec Clocking Source
24.576 MHz
Local crystal or external into XTL_IN.
12.288 MHz
External into BIT_CLK.
48.000 MHz
14.31818 MHz
External into XTL_IN.
External into XTL_IN.
Rev. A | Page 31 of 32