NET2890 datasheet(48/73 Pages) ETC

48 / 73 page

Specification

NET2890 USB Interface Controller

____________________________________________________________________________________

NetChip Technology, Inc., 1999

335 Pioneer Way, Mountain View, California 94041

TEL (650) 526-1490

FAX (650) 526-1494

http://www.netchip.com

Rev 2.0, Draft 9, July 16, 1999

5.5 Setup Registers

The Setup registers are dedicated to storing an 8-byte SETUP packet received by Endpoint 0.

5.5.1 (Address 10h; SETUP0) Setup Byte 0

Bits

Description

Read

Write

Default

Value

7:0

Setup Byte 0. This port provides byte 0 of the last setup packet received. For a

Standard Device Request, the following bmRequestType information is returned:

Bit

Description

Direction: 0 = host to device; 1 = device to host

6:5

Type: 0 = Standard, 1 = Class, 2 = Vendor, 3 = Reserved

4:0

Recipient: 0 = Device, 1 = Interface, 2 = Endpoint, 3 = Other,

4-31 = Reserved

Yes

5.5.2 (Address 11h; SETUP1) Setup Byte 1

Bits

Description

Read

Write

Default

Value

7:0

Setup Byte 1. This port provides byte 1 of the last setup packet received. For a

Standard Device Request, the following bRequest Code information is returned:

Code

Description

00h

Get Status

01h

Clear Feature

02h

Reserved

03h

Set Feature

04h

Reserved

05h

Set Address

06h

Get Descriptor

07h

Set Descriptor

08h

Get Configuration

09h

Set Configuration

0Ah

Get Interface

0Bh

Set Interface

0Ch

Synch Frame

Yes

5.5.3 (Address 12h; SETUP2) Setup Byte 2

Bits

Description

Read

Write

Default

Value

7:0

Setup Byte 2. This port provides byte 2 of the last setup packet received. For a

Standard Device Request, the least significant byte of the wValue field is returned.

Yes

5.5.4 (Address 13h; SETUP3) Setup Byte 3

Bits

Description

Read

Write

Default

Value

7:0

Setup Byte 3. This port provides byte 3 of the last setup packet received. For a

Standard Device Request, the most significant byte of the wValue field is returned.

Yes

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