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Section 26 USB 2.0 Host/Function Module
Page 1438 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
6 to 0 BUFNMB[6:0] H'00 R/W Buffer Number
These bits specify the start block number of the FIFO
buffers to be assigned to the selected pipe. The
following blocks of FIFO buffers are assigned to the
selected pipe.
Block number BUFNMB to block number BUFNMB +
(BUFSIZE + 1) × (DBLB + 1) - 1
Specify a value from H'04 to H'7F.
When the selected pipe is one of PIPE1 to PIPE5,
any value can be set to these bits according to the
user system.
BUFNUMB = H'00 to H'03 are used exclusively for
DCP.
BUFNMB = H'04 is used exclusively for PIPE6.
When PIPE6 is not used, H'04 can be used for
other pipes.
When PIPE6 is selected, writing to these bits is
invalid and H'04 is automatically assigned by this
module.
BUFNMB = H'05 is used exclusively for PIPE7.
When PIPE7 is not used, H'05 can be used for
other pipes.
When PIPE7 is selected, writing to these bits is
invalid and H'05 is automatically assigned by this
module.
BUFNUMB = H'06 is used exclusively for PIPE8.
When PIPE8 is not used, H'06 can be used for
other pipes.
When PIPE8 is selected, writing to these bits is
invalid and H'06 is automatically assigned by this
module.
BUFNUMB = H'07 is used exclusively for PIPE9.
When PIPE9 is not used, H'07 can be used for
other pipes.
When PIPE9 is selected, writing to these bits is
invalid and H'07 is automatically assigned by this
module.
Modify these bits when the value of CSSTS is 0, the
PID bits are set to NAK, and no pipe is specified by
the CURPIPE bits.
Before modifying these bits after modifying the PID
bits for the selected pipe from BUF to NAK, check
that CSSTS and PBUSY are 0. However, if the PID
bits have been modified to NAK by this module,
checking PBUSY is not necessary.