SH7280 Datasheet, PDF(1410/1726 Page) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

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SH7280 Datasheet, PDF (1410/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

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Section 25 USB Function Module

CPU

Host

IN token

TR interrupt routine

Clear TR flag, Write transmit

data, and TRG/PKTE

TR interrupt routine

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 25.28 Timing for Setting the TR Interrupt Flag

25.11.9 Handling of Unused USB Pins

â¢ Handles the pins as listed below

DrVCC = 3.0V to 3.6V

DrVSS = 0 V

USD+ = Open

USD- = Open

VBUS = 0 V

USEBEXTAL = 0 V

USBXTAL = Open

Rev. 1.00 Jun. 26, 2008 Page 1380 of 1692

REJ09B0393-0100

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