r5s72060w200fpv Renesas Electronics Corporation., r5s72060w200fpv Datasheet - Page 762

• Manufacturer Part Number: r5s72060w200fpv
• Description: 32-bit Risc Microcomputer Superhtm Risc Engine Family / Sh7200 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Serial Communication Interface with FIFO (SCIF)
Rev. 2.00 Dec. 09, 2005 Page 738 of 1152
REJ09B0191-0200
Bit
5
Bit Name
TDFE
Initial
Value
1
R/W
R/(W)* Transmit FIFO Data Empty
Description
Indicates that data has been transferred from the
transmit FIFO data register (SCFTDR) to the transmit
shift register (SCTSR), the quantity of data in
SCFTDR has become less than the transmission
trigger number specified by the TTRG[1:0] bits in the
FIFO control register (SCFCR), and writing of transmit
data to SCFTDR is enabled.
0: The quantity of transmit data written to SCFTDR is
[Clearing conditions]
•
•
1: The quantity of transmit data in SCFTDR is less
[Setting conditions]
•
•
Note: 1. Since SCFTDR is a 16-byte FIFO register,
greater than the specified transmission trigger
number
than or equal to the specified transmission trigger
number*
TDFE is cleared to 0 when data exceeding the
specified transmission trigger number is written to
SCFTDR after 1 is read from TDFE and then 0 is
written
TDFE is cleared to 0 when DMAC is activated by
transmit FIFO data empty interrupt (TXI) and write
data exceeding the specified transmission trigger
number to SCFTDR
TDFE is set to 1 by a power-on reset
TDFE is set to 1 when the quantity of transmit
data in SCFTDR becomes less than or equal to
the specified transmission trigger number as a
result of transmission
the maximum quantity of data that can be
written when TDFE is 1 is "16 minus the
specified transmission trigger number". If an
attempt is made to write additional data, the
data is ignored. The quantity of data in
SCFTDR is indicated by the upper 8 bits of
SCFDR.
1