SH7670 Datasheet, PDF (735/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Bit
Bit Name
6
SQMON
5
PBUSY
Section 17 USB 2.0 Host/Function Module (USB)
Initial
Value
1
0
R/W
R
R
Description
Sequence Toggle Bit Monitor
Indicates the expected value of the sequence
toggle bit for the next transaction during the DCP
transfer.
0: DATA0
1: DATA1
This module allows this bit to toggle upon normal
completion of the transaction. However, this bit is
not allowed to toggle when a DATA-PID
disagreement occurs during the transfer in the
receiving direction.
When the function controller function is selected,
this module sets this bit to 1 (specifies DATA1 as
the expected value) upon normal reception of the
setup packet.
When the function controller function is selected,
this module does not reference to this bit during the
IN/OUT transaction of the status stage, and does
not allow this bit to toggle upon normal completion.
Pipe Busy
This bit indicates whether DCP is used or not for
the transaction when USB changes the PID bits
from BUF to NAK.
0: DCP is not used for the transaction.
1: DCP is used for the transaction.
This module modifies this bit from 0 to 1 upon start
of the USB transaction for the pertinent pipe, and
modifies the bit from 1 to 0 upon completion of one
transaction.
Reading this bit after software has set PID to NAK
allows checking that modification of the pipe
settings is possible.
For details, refer to (1) Pipe Control Register
Switching Procedures under section 17.4.3, Pipe
Control.
Rev. 1.00 Nov. 14, 2007 Page 709 of 1262
REJ09B0437-0100