Instruction manual

Renesas USB MCU and USB ASSP USB Basic Host and Peripheral firmware
R01AN0512EJ0210 Rev.2.10 Page 156 of 157
Apr 1, 2013
12. Limitations
USB-BASIC-FW is subject to the following restrictions.
1. The pipe usage methods are limited by the pipe information setting functions.
The receive pipe uses the transaction counter with the SHTNAK function.
2. The structures contain members of different types.
(Depending on the compiler, the address alignment of the structure members may be shifted.)
3. PDCD/HDCD must be prepared by the customer.
4. In a data transfer using the IFIS function (Isochronous IN Buffer Flush function), no BEMP interrupt is generated
when a buffer flush takes place after transfer of the final packet, so it is not possible to notify the higher level driver
of the transfer end condition.
5. In host mode and using non-OS, USB-BASIC-FW does not support suspend/resume of the connected hub and
devices connected to the hub’s down ports.
6. USB-BASIC-FW does not support suspend during data transfer. Execute suspend after confirming the data transfer
was completed.