SH7641 Datasheet, PDF (846/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

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