CS4297 Datasheet, PDF (28/46 Pages) Cirrus Logic – CrystalClear SoundFusion Audio Codec 97

CS4297
CrystalClear™ SoundFusion™ Audio Codec ’97
Vendor Reserved Registers (Index 5C - 7Ah)
These registers are reserved for future use by the Crystal as needed. The CS4297 ignores writes to these
registers, and read values from these registers will return 0000h.
Vendor ID1 (Index 7Ch)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
0
0
0
1
0
0
1
0
1
0
0
1
0
Vendor ID2 (Index 7Eh)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
1
0
0
1
0
0
0
0
0
0
1
1
The Vendor ID registers provide a means to determine the manufacturer of the AC’97 part within a system.
For the CS4297, the ID registers contain the ASCII code for the first 3 letters of Crystal (CRY). The final
byte of register ID2 is a Revision field for the part. In the case of the CS4297, the revision is 03h. Thus,
register ID1 contains the value 4352h, and register ID2 contains 5903h.
Register #
7Ch
7Eh
Vendor ID Value
4352h
5903h
Table 8. Vendor ID Register Values
28
DS242F5