3069RF-ZTAT Datasheet, PDF (311/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Pin
P9 /TxD
1
1
P9 /TxD
0
0
Pin Functions and Selection Method
Bit TE in SCR of SCI1, bit SMIF in SCMR, and bit P9 DDR select the pin function as follows.
1
SMIF
0
1
TE
0
1
—
P9 DDR
1
0
1
—
—
Pin function
P9 input
1
P9 output
1
TxD output
1
TxD output*
1
Note:
*
Functions as the TxD output pin, but there are two states: one in which the pin is
1
driven, and another in which the pin is at high-impedance.
Bit TE in SCR of SCI0, bit SMIF in SCMR, and bit P9 DDR select the pin function as follows.
0
SMIF
0
1
TE
0
1
—
P9 DDR
0
0
1
—
—
Pin function
P9 input
0
P9 output
0
TxD output
0
TxD output*
0
Note:
*
Functions as the TxD output pin, but there are two states: one in which the pin is
0
driven, and another in which the pin is at high-impedance.
Rev. 5.0, 09/04, page 289 of 978