H83217 Datasheet, PDF (159/520 Pages) Renesas Technology Corp – Single-Chip Microcomputer

7.6.3 Pin Functions
Port 5 has the same pin functions in each operating mode. Individual pins can also be used as SCI0
or SCI1 input/output pins. Table 7-11 indicates the pin functions of port 5.
Table 7-11 Port 5 Pin Functions
Pin
P5₅/SCK₁
Pin Functions and Selection Method
Bit C/A in SMR of SCI1, bits CKE0 and CKE1 in SCR of SCI1, and bit P5₅DDR
select the pin function as follows
CKE1
C/A
CKE0
P5₅DDR
Pin function
0
P5₅
input
0
0
0
1
1
—
P5₅
output
SCK₁
output
1
—
—
SCK₁
output
1
—
—
—
SCK₁
input
P5₄/RxD₁
P5₃/TxD₁
Bit RE in SCR of SCI1 and bit P5₄DDR select the pin function as follows
RE
P5₄DDR
Pin function
0
0
1
P5₄ input
P5₄ output
1
—
RxD₁ input
Bit TE in SCR of SCI1 and bit P5₃DDR select the pin function as follows
TE
P5₃DDR
Pin function
0
0
1
P5₃ input
P5₃ output
1
—
TxD₁ output
143