SH7764 Datasheet, PDF (1043/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 21 USB 2.0 Host/Function Module (USB)
 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.
Table 21.28 Error Detection when a Token is Received
Detection
Priority
1
2
3
4
Error
PID errors
CRC error and bit stuffing errors
Overrun and underrun errors
Interval errors
Generated Interrupt and Status
No interrupts are generated in both cases when
the host controller function is selected and the
function controller function is selected (ignored
as a corrupted packet).
No interrupts generated in both cases when the
host controller function is selected and the
function controller function is selected (ignored
as a corrupted packet).
An NRDY interrupt is generated to set the
OVRN bit in both cases when host controller
function is selected and function controller
function is selected.
When the host controller function is selected, no
tokens are transmitted.
When the function controller function is
selected, a zero-length packet is transmitted in
response to IN token. However, no data
packets are received in response to OUT token.
An NRDY interrupt is generated when the
function controller function is selected. It is not
generated when the host controller function is
selected.
Rev. 1.00 Nov. 22, 2007 Page 987 of 1692
REJ09B0360-0100