HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 914

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 25
25.6
Rev. 3.00 Jan. 18, 2008 Page 852 of 1458
REJ09B0033-0300
EP5 Isochronous-In Transfer
Figure 25.16
USB Function Controller (USBF)
Set EP5 transmit flag
Set EP5 transmit flag
has been transmitted?
In-token reception
has been transmitted?
In-token reception
(IFR3/EP5 TR = 1)
Data transmission
(IFR3/EP5 TR = 1)
Data transmission
Data in FIFO B side
SOF reception
Data in FIFO A side
SOF reception
in EP5 FIFO?
in EP5 FIFO?
FIFO buffer
FIFO buffer
switch over
switch over
Valid data
Valid data
USB function
to host
to host
EP5 Isochronous-In Transfer Operation (SOF is Normal)
Yes
Yes
Yes
Yes
No
No
No
No
Interrupt request (SOF)
Interrupt request (SOF)
(IFR3/EP5 TR = 1)
(IFR3/EP5 TR = 1)
Set EP5 transmit
Set EP5 transmit
transmission
transmission
request flag
request flag
0-byte data
0-byte data
FIFO A side
FIFO B side
Clear SOF packet detection
Clear SOF packet detection
Read time stamp register
Read time stamp register
of data to EP5 data
of data to EP5 data
register (EPDR5)
register (EPDR5)
Write one packet
Write one packet
flag (IFR2/SOF = 0)
H, L (TSRH, TSRL)
flag (IFR2/SOF = 0)
H, L (TSRH, TSRL)
Firmware
Time stamps
Time stamps
match?
match?
Yes
Yes
FIFO B side
FIFO A side
No
No
To figure
To figure
25.17
25.17
B
B