12 serial port register n (scsptr) – Renesas SH7781 User Manual
Page 1096
21. Serial Communication Interface with FIFO (SCIF)
Rev.1.00 Jan. 10, 2008 Page 1066 of 1658
REJ09B0261-0100
21.3.12
Serial Port Register n (SCSPTR)
SCSPTR is a 16-bit readable/writable register that controls input/output and data for the port pins
multiplexed with the serial communication interface (SCIF) pins at all times. Input data can be
read from the RXD pin, and output data written to the TXD pin, and breaks in serial
transmission/reception controlled, by means of bits 1 and 0.
All SCSPTR bits except bits 6, 4, 2, and 0 are initialized to 0 by a power-on reset or manual reset;
the value of bits 6, 4, 2, and 0 is undefined. SCSPTR is not initialized in the module standby state.
Note that when reading data via a serial port pin in the SCIF, the peripheral clock value from 2
cycles before is read.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
⎯
0
⎯
0
⎯
0
⎯
0
0
0
0
0
0
0
0
0
SPB2
DT
SPB2
IO
SCK
DT
SCK
IO
CTS
DT*
CTS
IO*
RTS
DT*
RTS
IO*
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
BIt:
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W
Description
15 to 8
—
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
7 RTSIO* 0
R/W
Serial
Port
SCIF_RTS Port Input/Output
Specifies the serial port
SCIF_RTS pin input/output
condition. When actually setting the
SCIF_RTS pin as
a port output pin to output the value set by the RTSDT
bit, the MCE bit in SCFCR should be cleared to 0.
0: RTSDT bit value is not output to
SCIF_RTS pin
1: RTSDT bit value is output to
SCIF_RTS pin