SH7080 Datasheet, PDF (793/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 15 Serial Communication Interface (SCI)
Initial
Bit
Bit Name value R/W Description
6
RDRF
0
R/(W)* Receive Data Register Full
Indicates that the received data is stored in the
receive data register (SCRDR).
0: Indicates that valid received data is not stored in
SCRDR
[Clearing conditions]
• By a power-on reset or in standby mode
• When 0 is written to RDRF after reading RDRF =
1
• When the SCRDR data is read by an RXI interrupt
through the DMAC
• When the DTC is activated by an RXI interrupt
and data is transferred from SCRDR while the
DISEL bit of MRB in the DTC is 0
1: Indicates that valid received data is stored in
SCRDR
[Setting condition]
• When serial reception ends normally and receive
data is transferred from SCRSR to SCRDR
Note: SCRDR and the RDRF flag are not affected and
retain their previous states even if an error is
detected during data reception or if the RE bit in
the serial control register (SCSCR) is cleared to
0. If reception of the next data is completed
while the RDRF flag is still set to 1, an overrun
error will occur and the received data will be
lost.
Rev. 3.00 May 17, 2007 Page 735 of 1582
REJ09B0181-0300