AK5370 データシートの表示（PDF） - Asahi Kasei Microdevices

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AK5370

USB I/F A/D Converter

Asahi Kasei Microdevices 

ASAHI KASEI

[AK5370]

Endpoint Descriptor is a pipe for the data. The AK5370 has two Endpoints. One is Endpoint0 for Control Transfer. Another is

Endpoint 1, whose direction is IN, is used for Isochronous Transfer. Standard AS Isochronous Endpoint tells Endpoint type like

In/OUT, maximum packet size, synchronization type, etc. to the host.

Main information of Class-Specific AS Endpoint Descriptor is sampling frequency.

Figure 6 shows Descriptor’s hierarchy.

Device

Device

Descriptor

Configuration

Configuration

Descriptor

Interface

Standard Audio Control

Interface Descriptor

Class-Specific Audio Control

Interface Descriptor

Class-Specific Descriptor

StandardInterface Descriptor

Standard AS Interface

Descriptor Alt. Setting 0

Standard AS Interface

Descriptor Alt. Setting 1

Class-Specific Audio Streaming

Interface Descriptor

Class-Specific AS Format Type

Descriptor

Standard AS Isochronous

Endpoint Descriptor

Class-Specific AS Isochronous

Endpoint Descriptor

Figure 6. Descriptor Hierarchy

Endpoint

(IN)

MS0027-E-00

9

2000/05

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