LAN9500AI datasheet(41/213 Pages) MICROCHIP

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DS00001875A-page 41

LAN950x

5.3.2.5.7

Set Configuration

The device supports only one configuration. An occurrence of this command places the device into the Configured state.

Since only one configuration is supported, 01h is the only supported configuration value.

5.3.2.5.8

Set Interface

Only one interface is supported by the device. Therefore, this command is of marginal use. If the command is issued

with an alternative setting of 00h and interface setting of 00h, as shown in Table 5-32, the device responds with an ACK.

Otherwise it responds with a STALL handshake.

5.3.3

USB VENDOR COMMANDS

The device implements several vendor specific commands in order to access CSRs and efficiently gather statistics. The

vendor commands allow direct access to Systems CSRs and MAC CSRs.

5.3.3.1

The commands allows the Host to write a single register. Burst writes are not supported. All writes are 32-bits.

TABLE 5-31:

FORMAT OF SET CONFIGURATION SETUP STAGE

Offset

Field

Value

bmRequestType

00h

bRequest

09h

wValue

Configuration Value

wIndex

00h

wLength

00h

TABLE 5-32:

FORMAT OF SET INTERFACE SETUP STAGE

Offset

Field

Value

bmRequestType

01h

bRequest

0Bh

wValue

00h

wIndex

00h

wLength

00h

Note:

When in the Normal state, accesses to the MAC CSRs are stalled.

TABLE 5-33:

FORMAT OF REGISTER WRITE SETUP STAGE

Offset

Field

Value

bmRequestType

40h

bRequest

A0h

wValue

00h

wIndex

{0h, CSR Address[11:0]}

wLength

04h

TABLE 5-34:

FORMAT OF REGISTER WRITE DATA STAGE

Offset

Field

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