YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 581

• 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

10.10
Port B is an 8-bit I/O port that also has other functions. The port B has the following registers.
• Port B data direction register (PBDDR)
• Port B data register (PBDR)
• Port B register (PORTB)
• Port B pull-up MOS control register (PBPCR)
10.10.1 Port B Data Direction Register (PBDDR)
The individual bits of PBDDR specify input or output for the pins of port B.
PBDDR cannot be read; if it is, an undefined value will be read.
Bit
7
6
5
4
3
2
1
0
Bit Name
PB7DDR
PB6DDR
PB5DDR
PB4DDR
PB3DDR
PB2DDR
PB1DDR
PB0DDR
Port B
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
Port B pins are address outputs regardless of the
PBDDR settings.
Modes 7 (when EXPE = 1) and 4
Setting a PBDDR bit to 1 makes the
corresponding port B pin an address output,
while clearing the bit to 0 makes the pin an input
port.
Modes 7 (when EXPE = 0)
Port B is an I/O port, and its pin functions can be
switched with PBDDR.
Rev.7.00 Mar. 18, 2009 page 513 of 1136
Section 10 I/O Ports
REJ09B0109-0700