HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 376

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 14 Serial Communication Interface with FIFO (SCIF)
Rev. 6.00 Jun. 12, 2007 Page 344 of 610
REJ09B0131-0600
Bit
1
Bit Name
RDF
Initial
value
0
R/W
R/(W)* Receive FIFO Data Full
Description
Indicates that receive data has been transferred to
the receive FIFO data register (SCFRDR), and the
number of data in SCFRDR has become more than
the receive trigger number specified by the RTRG1
and RTRG0 bits in the FIFO control register
(SCFCR).
0: The number of transmit data written to SCFRDR is
[Clearing conditions]
•
•
1: The number of receive data in SCFRDR is more
[Setting condition]
•
Note: * SCFTDR is a 16-byte FIFO register. When
less than the specified receive trigger number
than the specified receive trigger number
RDF is cleared to 0 by a power-on reset
RDF is cleared to 0 when the SCFRDR is read
until the number of receive data in SCFRDR
becomes less than the specified receive trigger
number after 1 is read from RDF and then 0 is
written
RDF is set to 1 when a number of receive data
more than the specified receive trigger number is
stored in SCFRDR*
RDF is 1, the specified receive trigger
number of data can be read at the maximum.
If an attempt is made to read after all the data
in SCFRDR has been read, the data is
undefined. The number of receive data in
SCFRDR is indicated by the lower 8 bits of
SCFDR.