22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1117 of 1658
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W Description
1 RFUDF
0 R/W
Receive
FIFO
Underflow
0: Indicates that no receive FIFO underflow occurs
1: Indicates that a receive FIFO underflow occurs
A receive FIFO underflow means that reading of SIRDR
has occurred when the receive FIFO is empty.
When a receive FIFO underflow occurs, the value of
data read from SIRDR is not guaranteed.
•
This bit is valid when the RXE bit in SICTR is 1.
•
When 1 is written to this bit, the contents are
cleared. Writing 0 to this bit is invalid.
•
To enable the issuance of this interrupt source, set
the RFUDFE bit in SIIER is set to 1.
0 RFOVF
0 R/W
Receive
FIFO
Overflow
0: Indicates that no receive FIFO overflow occurs
1: Indicates a receive FIFO overflow occurs
A receive FIFO overflow means that writing has
occurred when the receive FIFO is full.
When a receive FIFO overflow occurs, the SIOF
indicates overflow, and receive data is lost.
•
This bit is valid when the RXE bit in SICTR is 1.
•
When 1 is written to this bit, the contents are
cleared. Writing 0 to this bit is invalid.
•
To enable the issuance of this interrupt source, set
the RFOVFE bit in SIIER is set to 1.
Содержание SH7781
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Страница 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Страница 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Страница 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Страница 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Страница 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Страница 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Страница 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Страница 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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