AD1981A Analog Devices, AD1981A Datasheet - Page 22

• Manufacturer Part Number: AD1981A
• Description: AD1981A AC'97 Soundmax Codec
• Manufacturer: Analog Devices

AD1981A
T[7:0] This register is ASCII encoded to ‘S’
REV[7:0] Vendor-specific revision number: The AD1981A assigns 71h to this field.
ID1
1
1
0
0
Reg Num Name
Note that the ID# Pins have weak internal pull-ups and are inverted internally.
7Eh
Vendor ID2 T7 T6 T5 T4 T3 T2 T1 T0 REV7 REV6 REV5 REV4 REV3 REV2 REV1 REV0 5372h
IDO
1
0
1
0
D15 D14 D13 D12 D11 D10 D9 D8
CODEC ID
(00) PRIMARY
(01) SECONDARY
(00) PRIMARY
(00) PRIMARY
Table II. Codec ID and External Clock Selection
Vendor ID Registers (Index 7Eh)
D7
CODEC CLOCKING SOURCE
24.576 MHz (Local Xtal or External into XTL_IN)
48.000 MHz (External into XTL_IN)
14.31818 MHz (External into XTL_IN)
12.288 MHz (External into Bit_Clk)
D6
D5
D4
D3
D2
D1
D0
Default