TUSB3410 datasheet(84/92 Pages) TI

84 / 92 page

11–14

Table 11–9. Bootcode Response to Control Read Transfer

CONTROL READ

ACTION IN BOOTCODE

Get status of device

Return power and remote wakeup settings

Get status of interface

Return 2 bytes of zeros

Get status of endpoint

Return endpoint status

Get descriptor of device

Return device descriptor

Get descriptor of configuration

Return configuration descriptor

Get descriptor of string

Return string descriptor

Get descriptor of interface

Stall

Get descriptor of endpoint

Stall

Get configuration

Return bConfiguredNumber value

Get interface

Return bInterfaceNumber value

Setup (0)

IN(1)

INT

Setup Stage

Status Stage

1.Hardware generates interrupt

to MCU.

2.Hardware sets NAK on both

endpoints.

3.Set DIR bit in USBCTL to

indicate the data directory.

3.Decode the setup packet

4.If another setup packet

arrives, abandon this one.

5.Executes appropriate routines.

a) Clear NAK bit in IN

endpoint.

b) Keep a note so IN interrupt

routine can take proper

action to the request.

1.Hardware does NOT generates

interrupt to MCU.

Figure 11–2. Control Write Transfer Without Data Stage

Table 11–10. Bootcode Response to Control Write Without Data Stage

CONTROL WRITE WITHOUT DATA STAGE

ACTION IN BOOTCODE

Clear feature of device

Stall

Clear feature of interface

Stall

Clear feature of endpoint

Clear endpoint stall

Set feature of device

Stall

Set feature of interface

Stall

Set feature of endpoint

Stall endpoint

Set address

Set device address

Set descriptor

Stall

Set configuration

Set bConfiguredNumber

Set interface

SetbInterfaceNumber

Sync. frame

Stall

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