SH7713 datasheet(591/904 Pages) RENESAS

591 / 904 page

Section 16 Serial Communication Interface with FIFO (SCIF)

Rev.1.50 Aug. 30, 2006 Page 551 of 860

REJ09B0288-0150

Bit

Bit Name

Initial

Value

R/W

Description

RDF

R/(W)*

Receive FIFO Data Full

Indicates that the received data has been

transferred from SCRSR to SCFRDR, and the

number of receive data bytes in SCFRDR is equal

to or greater than the receive trigger number set by

bits RTRG1 and RTRG0 in SCFCR.

0: The number of receive data bytes in SCFRDR is

less than the receive trigger set number

[Clearing conditions]

• Power-on reset or manual reset

• When SCFRDR is read until the number of

receive data bytes in SCFRDR is less than the

receive trigger set number, and 0 is written to

RDF after reading RDF = 1

• When SCFRDR is read by the DMAC until the

number of receive data bytes in SCFRDR is less

than the receive trigger set number

1: The number of receive data bytes in SCFRDR is

equal to or greater than the receive trigger set

number

[Setting condition]

When SCFRDR contains at least the receive trigger

set number of receive data bytes*

Note: * SCFRDR is a 16-byte FIFO register. When

RDF = 1, at least the receive trigger set

number of data bytes can be read. If data is

read when SCFRDR is empty, an undefined

value will be returned. The number of

receive data bytes in SCFRDR is indicated

by the lower bits in SCFDR.

SH7713 Datasheet(PDF) 591 Page - Renesas Technology Corp