SH7670 Datasheet, PDF (685/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 17 USB 2.0 Host/Function Module (USB)
Initial
Bit
Bit Name
Value R/W Description
13
DCLRM
0
R/W Auto Buffer Memory Clear Mode Accessed after
Specified Pipe Data is Read
Enables or disables the buffer memory to be cleared
automatically after data has been read out using the
selected pipe.
0: Auto buffer clear mode is disabled.
1: Auto buffer clear mode is enabled.
With this bit set to 1, this module sets BCLR to 1 for
the FIFO buffer of the selected pipe on receiving a
zero-length packet while the FIFO buffer assigned to
the selected pipe is empty, or on receiving a short
packet and reading the data while BFRE is 1.
When using this module with the BRDYM bit set to 1,
set this bit to 0.
12
DREQE
0
R/W DMA Transfer Request Enable
Enables or disables the DMA transfer request to be
issued.
0: Request disabled
1: Request enabled
Before setting this bit to 1 to enable the DMA transfer
request to be issued, set the CURPIPE bits.
Before modifying the CURPIPE bit setting, set this bit
to 0.
Rev. 1.00 Nov. 14, 2007 Page 659 of 1262
REJ09B0437-0100