AK4571 Datasheet, PDF (16/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
2.3.
AK4571
MICBIAS
AK4571
2.2V
1mA
USB
Hi-Z
MICBIAS
300
2.4.
EEPROM
AK4571 Device Descriptor, String Descriptor
Descriptor
ROM
ROM
AK4571
ID
ID
EEPROM I/F
1) Device Descriptor(18 )
2) String Descriptor (Manufacturer Name, Product Name
2
50
100 )
EEPROM 4
EEPROM
String Descriptor
Microwire I/F 1K/2K/4K bit EEPROM
EPEN ”H”
AK4571
GET_DESCRITPOR(String)
AKM AK93C45A/55A/65A
EEPROM Device Descriptor
EEPROM
ROM
ROM
EPEN = “L” CS, SK, EPAO
”Descriptor
"
Hi-Z
1Kbit EEPROM
String Descriptor
2K/4Kbit EEPROM
String Descriptor
String Descriptor
52
100
52
50
100
102
K bit EEPROM
EPSEL ”L” 2K/4K bit EEPROM
EPSEL ”H”
EEPROM
Device Descriptor (18 bytes)
String Descriptor Lang ID (4 bytes index = 0)
String Descriptor iManufacturer (52 or 102 bytes: index =1)
String Descriptor iProduct (52 or 102 bytes: index = 2)
1K bit EEPROM
(AK93C45A)
00h -08h
09h –0Ah
0Bh-24h-
25h-3Eh
2K/4K bit EEPROM
(AK93C55A/65A)
00h-08h
09h-0Ah
0Bh-3Dh
3Eh-71h
Table 1 Relationship between EEPROM Address and Descriptor
AK4571
EEPROM
EEPROM
EEPROM
EEPROM
EPEN=”L” EEPROM -
EEPROM
EEPROM
CS, CK, EPAO Hi-Z
MS0153-J-02
- 16 -
2003/3