HD64F3039F18 Datasheet, PDF (182/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
7.6.2 Register Descriptions
Table 7.8 summarizes the registers of port 6.
Table 7.8 Port 6 Registers
Address* Name
Abbreviation R/W
H'FFC9 Port 6 data direction P6DDR
W
register
H'FFCB Port 6 data register P6DR
R/W
Note: * Lower 16 bits of the address.
Initial Value
Modes 1, 3, and 5 Modes 6 and 7
H'F8
H'80
H'80
H'80
Port 6 Data Direction Register (P6DDR)
P6DDR is an 8-bit write-only register that can select input or output for each pin in port 6.
Bit
7
—
Initial value
1
Read/Write
—
6
5
4
3
2
— P6₅DDR P6₄DDR P6₃DDR —
0
0
0
0
0
W
W
W
W
W
1
0
— P6₀DDR
0
0
W
W
Reserved bits
Port 6 data direction 5 to 3, 0
These bits select input or output for port 6 pins
Bits 7, 6, 2, and 1 are reserved.
P6DDR is a write-only register. Its value cannot be read. All bits return 1 when read.
P6DDR is initialized to H'80 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting. If a P6DDR bit is set to 1, the corresponding pin maintains its output
state in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 158 of 682
REJ09B0353-0300