22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1116 of 1658
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W Description
3 TFOVF
0 R/W
Transmit
FIFO
Overflow
0: Indicates that no transmit FIFO overflow occurs
1: Indicates that a transmit FIFO overflow occurs
A transmit FIFO overflow means that there has been an
attempt to write to SITDR when the transmit FIFO is full.
When a transmit FIFO overflow occurs, the SIOF
indicates overflow, and writing is invalid.
•
This bit is valid when the TXE 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 TFOVFE bit in SIIER to 1.
2 TFUDF
0 R/W
Transmit
FIFO
Underflow
0: Indicates that no transmit FIFO underflow occurs
1: Indicates that a transmit FIFO underflow occurs
A transmit FIFO underflow means that loading for
transmission has occurred when the transmit FIFO is
empty.
When a transmit FIFO underflow occurs, the SIOF
repeatedly sends the previous transmit data.
•
This bit is valid when the TXE 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 TFUDFE bit to 1.
Содержание SH7781
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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 ...
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