YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 575

• Manufacturer Part Number: YR0K42378FC000BA
• Description: KIT EVAL FOR H8S/2378
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of YR0K42378FC000BA

• Contents: Board
• For Use With/related Products: H8S/2378
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

10.9
Port A is an 8-bit I/O port that also has other functions. The port A has the following registers.
• 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)
• Port function control register 1 (PFCR1)
10.9.1
The individual bits of PADDR specify input or output for the pins of port A. PADDR cannot be
read; if it is, an undefined value will be read.
Bit
7
6
5
4
3
2
1
0
Bit Name
PA7DDR
PA6DDR
PA5DDR
PA4DDR
PA3DDR
PA2DDR
PA1DDR
PA0DDR
Port A
Port A Data Direction Register (PADDR)
Initial Value
0
0
0
0
0
0
0
0
R/W
W
W
W
W
W
W
W
W
Description
•
•
•
Modes 1 and 2
Pins PA4 to PA0 are address outputs regardless
of the PADDR settings.
For pins PA7 to PA5, when the corresponding bit
of A23E to A21E is set to 1, setting a PADDR bit
to 1 makes the corresponding port A pin an
address output, while clearing the bit to 0 makes
the pin an input port. Clearing one of bits A23E to
A21E to 0 makes the corresponding port A pin an
I/O port, and its function can be switched with
PADDR.
Modes 7 (when EXPE = 1) and 4
When the corresponding bit of A23E to A16E is
set to 1, setting a PADDR bit to 1 makes the
corresponding port A pin an address output,
while clearing the bit to 0 makes the pin an input
port. Clearing one of bits A23E to A16E to 0
makes the corresponding port A pin an I/O port,
and its function can be switched with PADDR.
Mode 7 (when EXPE = 0)
Port A is an I/O port, and its pin functions can be
switched with PADDR.
Rev.7.00 Mar. 18, 2009 page 507 of 1136
Section 10 I/O Ports
REJ09B0109-0700