SH7764 Datasheet, PDF (1007/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 21 USB 2.0 Host/Function Module (USB)
Figure 21.4 shows the timing at which an NRDY interrupt is generated when the function
controller function is selected.
(1) Data transmission
USB bus
IN token packet
NAK handshake
NRDY interrupt
(2) Data reception: OUT token reception
USB bus
OUT token packet
NRDY interrupt
(CRC error, etc)
Data packet
NAK handshake
(3) Data reception: PING token reception
USB bus
PING packet
NAK handshake
NRDY interrupt
Figure 21.4 Timing at which NRDY Interrupt is Generated when Function Controller
Function is Selected
Rev. 1.00 Nov. 22, 2007 Page 951 of 1692
REJ09B0360-0100