SH7706 Datasheet, PDF (429/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 14 Serial Communication Interface (SCI)
14.3.8 SC Port Control Register (SCPCR)
The SC port control register (SCPCR) controls the direction of I/O signals on the SCI and SCIF
pins. SCPCR settings are used to perform I/O direction control, enabling data written in SCPDR to
be output to the TxD0 pin, data read from the RxD0 pin to be input, and the breaking of serial
transmission/reception. It is also possible to read data on and write output data to the SCK0 pin.
The I/O controls on the SCI and SCIF pins are performed using bits 3 to 0, and bits 11 to 4 in
SCPCR, respectively.
Bit
Bit Name
15 to 12 
Initial Value R/W
All 0
R
11
SCP5MD1 1
R/W
10
SCP5MD0 0
R/W
9
SCP4MD1 1
R/W
8
SCP4MD0 0
R/W
7
SCP3MD1 1
R/W
6
SCP3MD0 0
R/W
5
SCP2MD1 0
R/W
4
SCP2MD0 0
R/W
3
SCP1MD1 1
R/W
2
SCP1MD0 0
R/W
1
SCP0MD1 0
R/W
0
SCP0MD0 0
R/W
Description
Reserved
These bits are always read as 0; only 0 should be
written here.
See section 17.1.10, SC Port Control Register
(SCPCR).
Serial clock port I/O
These bits specify serial port SCK0 pin I/O. When
the SCK0 pin is actually used as a port I/O pin,
clear the C/A bit of SCSMR and bits CKE1 and
CKE0 of SCSCR to 0.
00: SCP1DT bit value is not output to SCK0 pin.
01: SCP1DT bit value is output to SCK0 pin.
10: SCK0 pin value is read from SCP1DT bit.
11: SCK0 pin value is read from SCP1DT bit.
Serial port break I/O
These bits specify the serial port TxD0 pin output
condition. When the TxD0 pin is actually used as
a port output pin and outputs the value set with
the SCP0DT bit, clear the TE bit of SCSCR to 0.
00: SCP0DT bit value is not output to TxD0 pin.
01: SCP0DT bit value is output to TxD0 pin.
Rev. 5.00 May 29, 2006 page 381 of 698
REJ09B0146-0500