21. Serial Communication Interface with FIFO (SCIF)
Rev.1.00 Jan. 10, 2008 Page 1084 of 1658
REJ09B0261-0100
5. When modem control is enabled, the
SCIF_RTS
signal is output when SCFRDR is empty.
When
SCIF_RTS
is 0, reception is possible. When
SCIF_RTS
is 1, this indicates that
SCFRDR contains bytes of data equal to or more than the
SCIF_RTS
output active trigger
count. The
SCIF_RTS
output active trigger value is specified by bits 10 to 8 in SCFCR. For
details, see section 21.3.9, FIFO Control Register n (SCFCR). In addition,
SCIF_RTS
is also 1
when the RE bit in SCSCR is cleared to 0.
Figure 21.14 shows an example of the operation when modem control is used.
D0
D1
D2
D7 0/1 1
0
0
Serial data
SCIF_RXD
SC
IF_
R
T
S
Start
bit
Parity
bit
Stop
bit
Start
bit
Figure 21.14 Example of Operation Using Modem Control (
SCIF_RTS
)
(Only in Channels 1 and 2)
Содержание SH7781
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