HD64F3039F18 Datasheet, PDF (189/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

7.8.2 Register Descriptions
Table 7.11 summarizes the registers of port 8.
Table 7.11 Port 8 Registers
Address* Name
H'FFCD Port 8 data direction register
H'FFCF
Port 8 data register
Note: * Lower 16 bits of the address.
Abbreviation
P8DDR
P8DR
Section 7 I/O Ports
R/W
Initial Value
W
H'E0
R/W
H'E0
Port 8 Data Direction Register (P8DDR)
P8DDR is an 8-bit write-only register that can select input or output for each pin in port 8.
7
6
5
4
3
2
1
0
Bit
—
—
—
—
—
— P8₁DDR P8₀DDR
Initial value 1
1
1
0
0
0
0
0
Read/Write —
—
—
W
W
W
W
W
Reserved bits
Port 8 data direction 1 and 0
These bits select input or
output for port 8 pins
P8DDR is initialized to H'E0 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting. If a P8DDR bit is set to 1, the corresponding pin maintains its output
state in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 165 of 682
REJ09B0353-0300