h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 185

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

9.6
Port A is a 4-bit I/O port that also has other functions. Port A has the following registers.
9.6.1
PADDR is an 8-bit write-only register, the individual bits of which specify whether the pins of
port A are used for input or output.
Bit
7 to
4
3
2
1
0
Port A data direction register (PADDR)
Port A data register (PADR)
Port A register (PORTA)
Port A pull-up MOS control register (PAPCR)
Port A open-drain control register (PAODR)
Bit Name
PA3DDR
PA2DDR
PA1DDR
PA0DDR
Port A Data Direction Register (PADDR)
Port A
Initial Value
Undefined
0
0
0
0
R/W
W
W
W
W
Description
Reserved
These bits are read as undefined value and cannot
be modified.
When a pin is specified as a general purpose I/O
port, setting these bits to 1 makes the corresponding
port A pin an output pin. Clearing these bits to 0
makes the pin an input pin.
Rev. 3.00 Oct 04, 2005 page 145 of 598
Section 9 I/O Ports
REJ09B0155-0300