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SH7721 Datasheet(PDF) 911 Page - Renesas Technology Corp

Part # SH7721
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  1524 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7721 Datasheet(HTML) 911 Page - Renesas Technology Corp

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Section 25
USB Function Controller (USBF)
Rev. 3.00 Jan. 18, 2008 Page 849 of 1458
REJ09B0033-0300
25.5
EP4 Isochronous-Out Transfer
SOF reception
FIFO buffer switch over
Yes
Yes
Yes
Yes
No
No
No
Out-token reception
FIFO A side
FIFO B side
FIFO B side
No errorin
receive data?
Time stamps
match?
Data reception from host
Set EP4 abnormal
reception flag to 1
(IFR3/EP4 TF = 1)
Set EP4 normal
reception flag to 1
(IFR3/EP4 TS = 1)
No
Clear SOF packet
detection flag
(IFR2/SOF = 0)
Read time stamp
register H, L(TSRH,TSRL)
A
Read EP4
receive data size register
(EPSZ4)
Read EP4 flag
(IFR3/EP4 TS, EP4 TF)
Read data
from EP4 data register
(EPDR4)
Read EP4
receive data size register
(EPSZ4)
Read EP4 flag
(IFR3/EP4 TS, EP4 TF)
Read data
from EP4 data register
(EPDR4)
Interrupt request (SOF)
Interrupt request (SOF)
USB function
Firmware
To figure
25.15
To figure
25.15
SOF reception
FIFO buffer switch over
Out-token reception
No errorin
receive data?
Data reception from host
Set EP4 abnormal
reception flag to 1
(IFR3/EP4 TF = 1)
Set EP4 normal
reception flag to 1
(IFR3/EP4 TS = 1)
FIFO A side
Time stamps
match?
Clear SOF packet
detection flag
(IFR2/SOF = 0)
Read time stamp
register H, L(TSRH,TSRL)
A
Figure 25.14
EP4 Isochronous-Out Transfer Operation (SOF is Normal)



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