HD6413007F20 Datasheet, PDF (294/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

8. I/O Ports
Pin
P9 /RxD
3
1
P9₂/RxD₀
P9₁/TxD₁
P9₀/TxD₀
Pin Functions and Selection Method
Bit RE in SCR of SCI1, bit SMIF in SCMR, and bit P9 DDR select the pin
3
function as follows.
SMIF
0
1
RE
0
1
⎯
P9 DDR
3
Pin function
0
P9 input
3
1
P9 output
3
⎯
RxD input
1
⎯
RxD input
1
Bit RE in SCR of SCI0, bit SMIF in SCMR, and bit P9₂DDR select the pin
function as follows.
SMIF
0
1
RE
0
1
⎯
P9₂DDR
Pin function
0
P9 input
2
1
P9 output
2
⎯
RxD input
0
⎯
RxD input
0
Bit TE in SCR of SCI1, bit SMIF in SCMR, and bit P9₁DDR select the pin
function as follows.
SMIF
0
1
TE
0
1
⎯
P9 DDR
1
0
1
⎯
⎯
Pin function
P9₁ input P9₁ output TxD₁ output TxD₁ output*
Note: * Functions as the TxD₁ output pin, but there are two states: one
in which the pin is driven, and another in which the pin is at high-
impedance.
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.5.00 Sep. 12, 2007 Page 264 of 764
REJ09B0396-0500