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Rev. 5.00, 09/03, page 445 of 760
SCPDR Bit 1—Serial Clock Port Data (SCP1DT): Specifies the serial port SCK pin I/O data.
Input or output is specified by the SCP1MD1 and SCP1MD0 bits. In output mode, the value of
the SCP1DT bit is output to the SCK pin.
Bit 1:
SCP1DT Description
0 I/O data is low (Initial value)
1 I/O data is high
SCPCR Bits 1 and 0—Serial Port Break I/O (SCP0MD1, SCP0MD0): Specify the serial port
TxD pin output condition. When the TxD pin is actually used as a port output pin and outputs the
value set with the SCP0DT bit, clear the TE bit in SCSCR to 0.
Bit 1:
SCP0MD1
Bit 0:
SCP0MD0 Description
0 0 SCP0DT bit value is not output to TxD pin (Initial value)
0 1 SCP0DT bit value is output to TxD pin
SCPDR Bit 0—Serial Port Break Data (SCP0DT): Specifies the serial port RxD pin input data
and TxD pin output data. The TxD pin output condition is specified by the SCP0MD1 and
SCP0MD0 bits. When the TxD pin is set to output mode, the value of the SCP0DT bit is output to
the TxD pin. The RxD pin value is read from the SCP0DT bit regardless of the values of the
SCP0MD1 and SCP0MD0 bits, if RE in SCSCR is set to 1. The initial value of this bit after a
power-on reset is undefined.
Bit 0:
SCP0DT Description
0 I/O data is low (Initial value)
1 I/O data is high
Block diagrams of the SCI I/O port pins are shown in figures 14.2, 14.3, and 14.4.