HD64F3039F18 Datasheet, PDF (194/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
P9DR is initialized to H'C0 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
7.9.3 Pin Functions
The port 9 pins are also used for SCI input and output (TxD, RxD, SCK), and for IRQ₅ and IRQ₄
input. Table 7.14 describes the selection of pin functions.
Table 7.14 Port 9 Pin Functions
Pin
Pin Functions and Selection Method
P9₅/SCK₁/
IRQ₅
Bit C/A in SMR of SCI1, bits CKE0 and CKE1 in SCR of SCI1, and bit P9₅DDR select
the pin function as follows
CKE1
0
1
C/A
0
1
—
CKE0
0
1
—
—
P9₅DDR
Pin function
0
P9₅
input
1
P9₅
output
—
SCK₁ output
—
SCK₁ output
—
SCK₁ input
IRQ input
5
P9₄/SCK₀/
IRQ₄
Bit C/A in SMR of SCI0, bits CKE0 and CKE1 in SCR of SCI, and bit P9₄DDR select
the pin function as follows
CKE1
0
1
C/A
0
1
—
CKE0
0
1
—
—
P9₄DDR
Pin function
0
P9₄
input
1
P9₄
output
—
SCK₀ output
—
SCK₀ output
—
SCK₀ input
IRQ input
4
Rev.3.00 Mar. 26, 2007 Page 170 of 682
REJ09B0353-0300