SH7205 Datasheet, PDF (1264/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 24 USB 2.0 Host/Function Module (USB)
Initial
Bit
Bit Name Value
R/W Description
11 to 3 
Undefined R
Reserved
Undefined values are read from these bits. The write
value should always be 0.
2 to 0 IITV
000
R/W Interval Error Detection Interval*
Specifies the interval error detection timing for the
selected pipe in terms of frames, which is expressed
as n-th power of 2 (n is the value to be set).
As described later, the detailed functions are
different in host controller mode and in function
controller mode.
Note: Before modifying these bits after USB
communication has been completed with these
bits set to a certain value, set PID to NAK and
then set ACLRM to 1 to initialize the interval
timer.
The IITV bits are invalid for PIPE3 to PIPE5;
set 0 in the bits corresponding to these pipes.
Notes: When the host controller function is selected, set the IFIS bit to 0.
∗ Modify these bits while CSSTS is 0 and PID is NAK and before the CURPIPE bit is
selected.
Before modifying these bits after modifying the PID bits for the selected pipe from BUF
to NAK, make sure that CSSTS = 0 and PBUSY = 0. However, if the PID bits have
been modified to NAK by this module, checking of PBUSY is not necessary.
Rev. 1.00 Mar. 25, 2008 Page 1232 of 1868
REJ09B0372-0100