AK4571 Datasheet, PDF (18/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
2.6.
HID Human Interface Device
2.6.1. HID
USB
PC
AK4571 Lineout
(OMUTE pin)
INC
Windows
INC pin
HID
DEC pin
Line
Lineout
ON/OFF
AK4571
HID
INC pin, DEC pin, OMUTE pin
Interrupt
AK4571
Interrupt
”1”
Set Feature Unit Feature
AK4571
2.6.2. HID
AK4571 HID Interface #3
Interface
Interrupt Endpoint (1 byte)
Interface #3
Standard
Interface Descriptor
Interface Number
Interface Class(HID)
etc.
HID Descriptor
Descriptor Type
Length of Report Descriptor
etc.
Endpoint Descriptor
EP address
Interrupt Endpoint
etc.
Figure 8 Hierarchy of HID Interface
Interrupt Endpoint 1
3
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
“0”
“0”
“0”
“0”
“0” OMUTE DEC
INC
AK4571 OMUTE INC , DEC
”á” Interrupt Endpoint(IEP)
”1”
Interrupt
1
NAK
MS0153-J-02
- 18 -
2003/3