HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 759

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Bit
3
2
Bit Name
TFOVF
TFUDF
0
Initial
Value
0
R/W
R/W
R/W
Description
Transmit FIFO Overflow
0: No transmit FIFO overflow
1: Transmit FIFO overflow
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.
•
•
•
Transmit FIFO Underflow
0: No transmit FIFO underflow
1: Transmit FIFO underflow
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.
If the issue of interrupts by this bit is enabled, an
SIOF interrupt is issued.
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.
If the issue of interrupts by this bit is enabled, an
SIOF interrupt is issued.
Rev. 3.00 Jan. 18, 2008 Page 697 of 1458
Section 21
Serial I/O with FIFO (SIOF)
REJ09B0033-0300