Hitachi H8S/2215 Series Hardware Manual page 521

Bit Bit Name Initial Value R/W
2 EP0iTR 0
1 EP0iTS 0
0 SetupTS 0
Note: * The write value should always be 0 to clear this flag.
Description
R/(W)* EP0i Transfer Request
Set to 1 if there is no valid transmit data in the FIFO
when an IN token is sent from the host to EP0i. The
corresponding interrupt output is EXIRQ0 or EXIRQ1.
R/(W)* EP0i Transfer Completion
Set to 1 if the transmit data written in EP0i is
transferred to the host normally and the ACK
handshake is returned. The corresponding interrupt
output is EXIRQ0 or EXIRQ1.
R/(W)* Setup Command Receive Completion
Set to 1 if the EP0s normally receives 8-byte data to
be decoded by the function from the host and returns
the ACK handshake to the host. The corresponding
interrupt output is EXIRQ0 or EXIRQ1.
Rev. 3.0, 10/02, page 463 of 686