Renesas SH7641 User Manual
Page 846
Section 20 USB Function Module
Rev. 4.00 Sep. 14, 2005 Page 796 of 982
REJ09B0023-0400
TR interrupt routine
TR interrupt routine
CPU
USB
Clear TR flag, Write transmit
data, and TRG/PKTE
IN token
Check NAK
Set TR flag
Host
NAK
IN token
Check NAK
Set TR flag
(flag is set again)
NAK
IN token
Data
transmission
ACK
Figure 20.24 Timing for Setting the TR Interrupt Flag
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