SH7203 Datasheet, PDF (1140/1686 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 23 USB 2.0 Host/Function Module (USB)
Bit
Bit Name
11, 10 MBW[1:0]
9 to 6 ⎯
5
ISEL
Initial
Value
00
All 0
0
R/W Description
R/W FIFO Port Access Bit Width
00: 8-bit width
01: 16-bit width
10: 32-bit width
11: Setting prohibited
When the selected CURPIPE is set to the buffer
memory read direction, use either of the following
methods to set these bits:
• Write to the MBW bits and set the CURPIPE bits
simultaneously.
• When the DCP (CURPIPE = 000) setting is
selected, write to the MBW bits and set the ISEL
bit simultaneously.
For details, see 23.4.4, Buffer Memory.
Note: Once reading from the buffer memory is
started, the access bit width of the FIFO port
cannot be changed until all of the data has
been read. Also, the bit width cannot be
changed from the 8-bit width to the 16-/32-bit
width or from the 16-bit width to the 32-bit width
while data is being written to the buffer
memory.
R
Reserved
These bits are always read as 0. The write value
should always be 0.
R/W FIFO Port Access Direction When DCP is Selected*²
0: Reading from the buffer memory is selected
1: Writing to the buffer memory is selected
This bit is valid only when DCP is selected with the
CURPIPE bit.
This bit should be set according to either of the
following procedures:
• Set the CURPIPE bits to DCP (CURPIPE = 000)
and set this bit at the same time.
• Set the CURPIPE bits to DCP (CURPIPE = 000),
wait for 200 ns, and then set this bit.
For details, see section 23.4.4, Buffer Memory.
Rev. 2.00 Apr. 16, 2008 Page 1110 of 1652
REJ09B0313-0200