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Section 26 USB 2.0 Host/Function Module
R01UH0134EJ0400 Rev. 4.00 Page 1533 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Table 26.27 Error Detection when a Token is Received
Detection
Priority Error Generated Interrupt and Status
1 PID errors 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).
2 CRC error and bit stuffing errors 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).
3 Overrun and underrun errors 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.
4 Interval errors An NRDY interrupt is generated when the
function controller function is selected. It is not
generated when the host controller function is
selected.