SH7205 Datasheet, PDF (1229/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 24 USB 2.0 Host/Function Module (USB)
In this case, this module sets the bit corresponding to the pipe and the CRCE bit to 1 and clears
the CSSTS bit to 0 (it does not modify the PID bit setting for the pipe).
(3) When the Function Controller Function is Selected
(a) Condition for Pipes in the Transmitting Direction
• When an IN token is received while the FIFO buffer contains no data for transmission:
In this case, this module generates an NRDY interrupt when it has received the IN token and
sets the bit corresponding to the pipe to 1. If the pipe where the interrupt has occurred is for
isochronous transfer, this module transmits a zero-length packet and sets the OVRN bit to 1.
(b) Conditions for Pipes in the Receiving Direction
• When an OUT token is received while the FIFO buffer has no empty space:
In the case of a pipe specified for isochronous transfer, this module generates an NRDY
interrupt request when it has received the OUT token and sets the bit corresponding to the pipe
and the OVRN bit to 1. In the case of a pipe not specified for isochronous transfer, this module
generates an NRDY interrupt request when it issues a NAK handshake after receiving data that
comes following the OUT token and sets the bit corresponding to the pipe to 1.
Note that the NRDY interrupt request is not generated for re-transmission (on a mismatch of
data PID). The interrupt request is also not generated when the data packet contains any error.
• When a PING token is received while the FIFO buffer has no empty space:
In this case, this module generates an NRDY interrupt request when it has received the PING
token and sets the bit corresponding to the pipe to 1.
• In a pipe specified for isochronous transfer, when the token is not received normally within the
interval frame:
In this case, this module generates an NRDY interrupt request when it has received SOF and
sets the bit corresponding to the pipe to 1.
Bit
Bit Name
15 to 10 
Initial
Value
R/W
Undefined R
9
PIPE9NRDY 0
R/W*
Description
Reserved
Undefined values are read from these bits. The write
value should always be 0.
NRDY Interrupt Status for PIPE9
0: Interrupt has not occurred
1: Interrupt has occurred
Rev. 1.00 Mar. 25, 2008 Page 1197 of 1868
REJ09B0372-0100