r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1000

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 USB Function Module (USB)
16.6
16.6.1
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
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 IFR1/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
register (EPDR0s) and decoded by firmware. The necessary data stage and status stage processing
should then be carried out according to the result of the decoding operation.
Rev. 1.00 Sep. 19, 2008 Page 970 of 1342
REJ09B0467-0100
Decoding not Necessary on Application Side
Clear Feature
Get Configuration
Get Interface
Get Status
Set Address
Set Configuration
Set Feature
Set Interface
Processing of USB Standard Commands and Class/Vendor
Commands
Processing of Commands Transmitted by Control Transfer
Decoding Necessary on Application Side
Get Descriptor
Class/Vendor command
Set Descriptor
Sync Frame