H8SXSLASH1663 datasheet(857/1158 Pages) RENESAS

857 / 1158 page

Section 16 USB Function Module (USB)

Rev.1.00 Jun. 07, 2006 Page 805 of 1102

REJ09B0294-0100

16.6

Processing of USB Standard Commands and Class/Vendor

Commands

16.6.1

Processing of Commands Transmitted by Control Transfer

A command transmitted from the host by control transfer may require decoding and execution of

command processing on the application side. Whether command decoding is required on the

application side is indicated in table 16.7 below.

Table 16.7

Command Decoding on Application Side

Decoding not Necessary on Application Side

Decoding Necessary on Application Side

Clear Feature

Get Configuration

Get Interface

Get Status

Set Address

Set Configuration

Set Feature

Set Interface

Get Descriptor

Class/Vendor command

Set Descriptor

Sync Frame

If decoding is not necessary on the application side, command decoding and data stage and status

stage processing are performed automatically. No processing is necessary by the user. An interrupt

is not generated in this case.

If decoding is necessary on the application side, this module stores the command in the EP0s

FIFO. After reception is completed successfully, the IFR0/SETUP TS flag is set and an interrupt

request is generated. In the interrupt routine, eight bytes of data must be read from the EP0s data

should then be carried out according to the result of the decoding operation.

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