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Section 26 USB 2.0 Host/Function Module
Page 1424 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
4 PINGE 0 R/W PING Token Issue Enable
When the host controller function is selected,
setting this bit to 1 allows this module to issue the
PING token during transfers in the transmitting
direction and start a transfer in the transmitting
direction with the PING transaction.
0: Disables issuing PING token.
1: Enables normal PING operation.
When having detected the ACK handshake during
PING transactions, this module performs the OUT
transaction as the next transaction.
When having detected the NAK handshake during
OUT transactions, this module performs the PING
transaction as the next transaction.
When the host controller function is selected,
setting this bit to 0 prevents this module from
issuing the PING token during transfers in the
transmitting direction and only allows this module to
perform OUT transactions for the transfers in the
transmitting direction.
These bits should be modified while CSSTS is 0
and PID is NAK.
Before changing the value of this bit after changing
the PID bits for the DCP from BUF to NAK, confirm
that CSSTS and PBUSY are both cleared to 0.
However, if the PID bits have been modified to NAK
by this module, checking PBUSY is not necessary.
When the function controller function is selected, be
sure to write 0 to this bit.
3 0 R Reserved
This bit is always read as 0. The write value should
always be 0.