SH7203 Datasheet, PDF (1198/1686 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 23 USB 2.0 Host/Function Module (USB)
(1) BRDY Interrupt
The BRDY interrupt is generated when either of the host controller function or function controller
function is selected. Table 23.12 shows the conditions under which this module sets 1 to a
corresponding bit in BRDYSTS. Under this condition, this module generates BRDY interrupt, if
software sets the PIPEBRDYE bit in BRDYENB that corresponds to the pipe to 1 and the
BRDYE bit in INTENB0 to 1. Figure 23.3 shows the timing at which the BRDY interrupt is
generated.
The conditions for clearing the BRDY bit in INTSTS0 by this module depend on the setting of the
BRDYM bit in INTENB1. Table 23.13 shows the conditions.
When the function controller function is selected, under condition 1 noted below, a zero-length
packet is always transmitted for an IN token, and the BRDY interrupt is not generated.
1. When the transfer type is set to bulk IN transfer, PID is set to BUF, and the ATREPM bit in
PIPEnCTR is set to H'01.
Rev. 2.00 Apr. 16, 2008 Page 1168 of 1652
REJ09B0313-0200