r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1273

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Bit
3
2
Bit Name
TFOVF
TFUDF
Initial
Value
0
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. 1.00 Oct. 01, 2007 Page 1207 of 1956
Section 29 Serial I/O with FIFO (SIOF)
REJ09B0256-0100