SH7720 Datasheet, PDF (912/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 25 USB Function Controller (USBF)
USB function
SOF is broken
Interrupt request (Time out)
Firmware
Clear time out flag
(IFR4/TMOUT = 0)
Interrupt end
Out-token reception
Data transmitted
from host is broken
FIFO A side
FIFO B side
SOF reception
FIFO buffer
switch over
Interrupt request (SOF)
Out-token reception
From figure
25.14
A
FIFO B side
Data reception from host
No error in
receive data?
No
Yes
Set EP4 normal
reception flag to 1
(IFR3/EP4 TS = 1)
Set EP4 abnormal
reception flag to 1
(IFR3/EP4 TF = 1)
Clear SOF packet
detection flag
(IFR2/SOF = 0)
Read time stamp register
H, L (TSRH,TSRL)
Time stamps do not match
Interrupt end
FIFO A side
Figure 25.15 EP4 Isochronous-Out Transfer Operation (SOF is Broken)
Rev. 3.00 Jan. 18, 2008 Page 850 of 1458
REJ09B0033-0300