SH7670 Datasheet, PDF (838/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 17 USB 2.0 Host/Function Module (USB)
(iv) Overrun and underrun errors
• When host controller function is selected:
 When using isochronous IN transfers (reception), the IN token was received but the buffer
memory is not empty.
 When using isochronous OUT transfers (transmission), the OUT token was transmitted, but
the data was not in the buffer memory.
• When function controller function is selected:
 When using isochronous IN transfers (transmission), the IN token was received but the data
was not in the buffer memory.
 When using isochronous OUT transfers (reception), the OUT token was received, but the
buffer memory was not empty.
(v) Interval errors
• During an isochronous IN transfer, the token could not be received during the interval frame.
• During an isochronous OUT transfer, the OUT token was received during frames other than
the interval frame.
Rev. 1.00 Nov. 14, 2007 Page 812 of 1262
REJ09B0437-0100