Cirrus Logic CS4297A - Manual (Page 31)

CS4297A
31
4.20 Vendor ID1 Register (Index 7Ch)
F[7:0] First Character of Vendor ID. With a value of F[7:0] = 43h, these bits define the ASCII ‘C’
character.
S[7:0] Second Character of Vendor ID. With a value of S[7:0] = 52h, these bits define the ASCII ‘R’
character.
Default 4352h. This register contains read-only data.
4.21 Vendor ID2 Register (Index 7Eh)
T[7:0] Third Character of Vendor ID. With a value of T[7:0] = 59h, these bits define the ASCII ‘Y’
character.
DID[2:0] Device ID. With a value of DID[2:0] = 001, these bits specify the audio codec is a CS4297A.
REV[2:0] Revision. With a value of REV[2:0] = 001, these bits specify the audio codec revision is ‘A’.
Default 591xh. This register contains read-only data.
The two Vendor ID registers provide a means to determine the manufacturer of the AC ’97 audio codec. The first
three bytes of the Vendor ID registers contain the ASCII code for the first three letters of Crystal (CRY). The final
byte of the Vendor ID registers is divided into a Device ID field and a Revision field. Table 8 lists the currently defined
Device ID’s. Table 9 lists the current revisions of the CS4297A.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
F7 F6 F5 F4 F3 F2 F1 F0 S7 S6 S5 S4 S3 S2 S1 S0
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
T7 T6 T5 T4 T3 T2 T1 T0 0 DID2 DID1 DID0 0 REV2 REV1 REV0
DID[2:0] Part Name
000 CS4297
001 CS4297A
010 CS4294/CS4298
011 CS4299
100 CS4201
101 CS4205
Table 8. Device ID with Corresponding Part Number
REV[2:0] Revision
001 A
010 B
011 C
100 D, E, F, G, H
101 K
110 L
Table 9. Revision Values
DS318PP6 31
CS4297A