Renesas H8S/2158 User Manual page 633

Bit Bit Name Initial Value R/W
2 EP1TF 0
1 EP0ITF 0
Section 18 Universal Serial Bus Interface (USB)
Description
R/(W) * Endpoint 1 Transfer Failure Flag
Indicates that the endpoint 1 host input transfer has
been completed abnormally.
0: Indicates that the endpoint 1 is in a transfer wait state.
[Clearing condition]
•
0 is written to EP1TF after EP1TF = 1 has been read.
1: Indicates that the endpoint 1 host input transfer (IN
transaction) has been completed abnormally.
[Setting conditions]
•
An ACK handshake cannot be achieved after an IN
token has been received and data has been
transferred.
•
Data cannot be sent because the FIFO is empty after
an IN token has been received (NAK transmission).
R/(W) * Endpoint 0 Transfer Failure Flag
Indicates that the endpoint 0 host input transfer has
been completed abnormally.
0: Indicates that the endpoint 0 is in a transfer wait state.
[Clearing conditions]
•
0 is written to EP0ITF after EP0ITF = 1 has been
read.
•
Endpoint 0 has received a SETUP token.
1: Indicates that the endpoint 0 host input transfer (IN
transaction) has been completed abnormally.
[Setting conditions]
•
An ACK handshake cannot be achieved after an IN
token has been received and data has been
transferred.
•
Data cannot be sent because the FIFO is empty after
an IN token has been received (NAK transmission).
Rev. 3.00 Jan 25, 2006 page 579 of 872
REJ09B0286-0300