HD6417606 RENESAS [Renesas Technology Corp], HD6417606 Datasheet - Page 281

• Manufacturer Part Number: HD6417606
• Manufacturer: RENESAS [Renesas Technology Corp]

Bit
1
Bit Name
RDF
Initial
value
0
R/W
R/(W)* Receive FIFO Data Full
Section 12 Serial Communication Interface with FIFO (SCIF)
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]
RDF is set to 1 when a number of receive data more
than the specified receive trigger number is stored in
SCFRDR*
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 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.
Rev. 4.00 Sep. 13, 2007 Page 255 of 502
REJ09B0239-0400