HD64F3048VTF8 Datasheet, PDF (324/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 9 I/O Ports
Pin
P9₁/TxD₁
Pin Functions and Selection Method
Bit TE in SCR of SCI1 and bit P9₁DDR select the pin function as follows
TE
0
1
P9₁DDR
Pin function
0
P9 input
1
1
P9 output
1
—
TxD output
1
P9₀/TxD₀
Bit TE in SCR of SCI0, bit SMIF in SCMR, and bit P9₀DDR select the pin
function as follows
SMIF
0
1
TE
0
1
—
P9₀DDR
0
1
—
—
Pin function
P9₀ input
P9₀ output TxD₀ output TxD₀ output^*
Note: * Functions as the TxD₀ output pin, but there are two states: one in
which the pin is driven, and another in which the pin is at high-
impedance.
Rev. 3.00 Sep 27, 2006 page 296 of 872
REJ09B0325-0300