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Section 26 USB 2.0 Host/Function Module
Page 1416 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
7 SHTNAK 0 R/W Disable Pipe when Transfer Finishes
Specifies whether the PID bit is changed to NAK
when a transfer finishes while the DCP is operating
in the receive direction.
0: Continue using pipe after transfer finishes.
1: Disable pipe when transfer finishes.
When this bit is set to 1, this module changes the
PID bit corresponding to the DCP to NAK when it
determines that a transfer to the DCP has finished.
This module determines that a transfer has finished
when a short packet of data (or a zero-length
packet) is received successfully.
Change the setting of this bit only when CSSTS = 0
and PID = NAK.
Before changing the setting of this bit after
changing the DCP’s PID bit from BUF to NAK,
confirm that the values of CSSTS and PBUSY are
0. However, it is not necessary for this module to
confirm the state of the PBUSY bit if the value of
the PID bit has already been changed to NAK.
6, 5 0 R/W Reserved
These bits are always read as 0. The write value
should always be 0.
4 DIR 0 R/W Transfer Direction
When the host controller function is selected, this
bit sets the transfer direction of data stage.
0: Data receiving direction
1: Data transmitting direction
When the function controller function is selected,
this bit should be cleared to 0.
3 to 0 All 0 R Reserved
These bits are always read as 0. The write value
should always be 0.