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Section 20 USB Function Module
Rev. 4.00 Sep. 14, 2005 Page 761 of 982
REJ09B0023-0400
Bit Bit
Name
Initial
Value R/W Description
4
EP2DE
0
R
EP2 Data Present
This bit is set when the endpoint 2 FIFO buffer
contains valid data
3 to 1
All
0
R
Reserved
The write value should always be 0.
0
EP0iDE
0
R
EP0i Data Present
This bit is set when the endpoint 0 transmit FIFO
buffer contains valid data.
20.3.19 USBFIFO Clear Register (USBFCLR)
USBFCLR is provided to initialize the FIFO buffers for each endpoint. Writing 1 to a bit clears all
the data in the corresponding FIFO buffer. The corresponding interrupt flag is not cleared. Do not
clear a FIFO buffer during transmission/reception.
USBFCLR can be initialized to H
'
00 by a power-on reset.
Bit Bit
Name
Initial
Value R/W Description
7
0
Reserved
The write value should always be 0.
6 EP3CLR
0 W
EP3
Clear
When 1 is written to this bit, the endpoint 3 transmit
FIFO buffer is initialized.
5 EP1CLR
0 W
EP1
Clear
When 1 is written to this bit, both FIFOs in the
endpoint 1 receive FIFO buffer are initialized.
4 EP2CLR
0 W
EP2
Clear
When 1 is written to this bit, both FIFOs in the
endpoint 2 transmit FIFO buffer are initialized.
3, 2
All
0
Reserved
The write value should always be 0.
1 EP0oCLR
0 W
EP0o
Clear
When 1 is written to this bit, the endpoint 0 receive
FIFO buffer is initialized.
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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Page 1036: ...SH7641 Hardware Manual...