r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 959

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

16.3.20 Trigger Register 0 (TRG0)
TRG0 generates one-shot triggers to control the transfer sequence for endpoint 0.
Bit
7
6
5
4
3
2
1
0
Bit Name





EP0s RDFN 0
EP0o RDFN 0
EP0i PKTE
Initial
Value
0
0
0
0
0
0
R/W





W
W
W
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
EP0s Read Complete
Write 1 to this bit after data for the EP0s command
FIFO has been read. Writing 1 to this bit enables
transfer of data in the following data stage. A NAK
handshake is returned in response to transfer
requests from the host in the data stage until 1 is
written to this bit.
EP0o Read Complete
Writing 1 to this bit after one packet of data has been
read from the endpoint 0 transmit FIFO buffer
initializes the FIFO buffer, enabling the next packet to
be received.
EP0i Packet Enable
After one packet of data has been written to the
endpoint 0 transmit FIFO buffer, the transmit data is
fixed by writing 1 to this bit.
Rev. 1.00 Sep. 19, 2008 Page 929 of 1342
Section 16 USB Function Module (USB)
REJ09B0467-0100