SH7720 Datasheet, PDF (923/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

CPU
Section 25 USB Function Controller (USBF)
TR interrupt routine
TR flag Transmit data TRG/
clearing writing
PKTE
TR interrupt routine
Host
USB
IN token
NAK
determination
NAK
TR flag setting
IN token
IN token
NAK
determination
NAK
Data
transmission
ACK
TR flag setting
(TR flag is set again)
Figure 25.20 Set Timing of TR Interrupt Flag
25.9.7 Note on Clock Frequency
When using the USBF, be sure to set the peripheral clock (Pφ) at a frequency higher than 13 MHz.
Rev. 3.00 Jan. 18, 2008 Page 861 of 1458
REJ09B0033-0300