Jonas, Thanks for your answer,I see!

On Thu, Sep 30, 2010 at 6:29 AM, Jonas Gulle <[email protected]> wrote:
> Hi,
>
> See the GET_DATA_RATES CCID specific request in the spec. [1].
>
>> 5.3.3 GET_DATA_RATES
>> This requests the CCID to report a list of selectable data rates which the
>> CCID is capable of supporting. The response is an array of double-words. The
>> data rates are reported in bps encoded in an integer value.
>> A CCID with bNumDataRatesSupported equal to 00h does not have to support
>> this request.
>>
>> wLength = bNumDataRatesSupported * sizeof(double word).
>>
>>
>> +---------------------------------------------------------------------------------------------
>> |bmRequestType | bRequest       | wValue | wIndex    | wLength        |
>> Data                 |
>>
>> +--------------+----------------+--------+-----------+----------------+----------------------+
>> |10100001B     | GET_DATA_RATES | 0000h  | Interface | length of data |
>> array of double words|
>>
>> +--------------+----------------+--------+-----------+----------------+----------------------+
>
> Is this what you are looking for?
>
> Kindest regards,
> Jonas
>
> [1]:
> http://www.usb.org/developers/devclass_docs/DWG_Smart-Card_CCID_Rev110.pdf
>
>
> On Mon, Sep 27, 2010 at 9:55 AM, jian jiao <[email protected]> wrote:
>>
>> Dear all,
>>    I  want to know the usb ccid's "Data Transfer Rate"? Where could I get
>> it?
>> Best Wishes!
>> Jianjiao
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>
>
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