DM9621 datasheet(43/66 Pages) DAVICOM

43 / 66 page

DM9621

USB2.0 to Fast Ethernet Controller

Preliminary

Version: DM9621 -14-DS-P02

February 23, 2011

Data Format

Offset

Name

Description

Byte 0

NSR

Network status register

Byte 1

TSR1

Reserved

Byte 2

TSR2

Reserved

Byte 3

RSR

RX status register

Byte 4

ROCR

Received overflow counter register

Byte 5

RXC

Received packet counter

Byte 6

TXC

Transmit packet counter

Byte 7

GPR

Reserved

7.1.4 Descriptor Values

All descriptors are stored in it’s default values. Values which are “?” in the table below are under define.

Device Descriptor/18-Byte

Offset

Field

Size

Value

Description

bLength

12H

Size of descriptor in bytes

bDescriptorType

01H

DEVICE Descriptor Type

bcdUSB

0200H USB BCD version

bDeviceClass

00H

Class code, assign by USB

Zero: No device level class

01H~FEH : Valid device class

FFH : Vender-specific

bDeviceSubClass

00H

SubClass code, assign by USB

bDeviceProtocol

00H

Protocol code, assign by USB

bMaxPacketSize0

08H

Maximum PL for EP0(8,16,32,64)

idVender

0A46H Vendor ID(0A46) (fm EEP)

idProduce

9621H

Product ID

9621H, RX header is 4-byte mode

bcdDevice

0101H Device release number

iManufacturer

01H

Index of string descriptor for manufacturer

iProduct

02H

Index of string descriptor for product

iSerialNumber

03H

Index of string descriptors for serial number

bNumConfigurations

01H

Number of configurations

DM9621 Datasheet(PDF) 43 Page - Davicom Semiconductor, Inc.

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