HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 203

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

8.3
Port 2 is an 8-bit I/O port. Port 2 pins also function as address bus output function, 8-bit PWM
output pins, and the timer connection output pin. Port 2 functions change according to the
operating mode. Port 2 has an on-chip input pull-up MOS function that can be controlled by
software. Port 2 has the following registers.
8.3.1
P2DDR specifies input or output for the pins of port 2 on a bit-by-bit basis.
Bit
7
6
5
4
3
2
1
0
Port 2 data direction register (P2DDR)
Port 2 data register (P2DR)
Port 2 pull-up MOS control register (P2PCR)
Bit Name
P27DDR
P26DDR
P25DDR
P24DDR
P23DDR
P22DDR
P21DDR
P20DDR
Port 2
Port 2 Data Direction Register (P2DDR)
Initial Value
0
0
0
0
0
0
0
0
R/W
W
W
W
W
W
W
W
W
In Mode 1:
The corresponding port 2 pins are address outputs,
regardless of the P2DDR setting.
Modes 2 and 3 (EXPE = 1):
The corresponding port 2 pins are address outputs
or PWM outputs when P2DDR bits are set to 1,
and input ports when cleared to 0. P27 to P24 are
switched from address outputs to output ports by
setting the IOSE bit to 1.
P27 can be used as an on-chip peripheral module
output pin regardless of the P27DDR setting, but to
ensure normal access to external space, P27
should not be set as an on-chip peripheral module
output pin when port 2 pins are used as address
output pins.
Modes 2 and 3 (EXPE = 0):
The corresponding port 2 pins are output ports or
PWM outputs when P2DDR bits are set to 1, and
input ports when cleared to 0.
P27 can be used as an on-chip peripheral module
output pin regardless of the P27DDR setting.
Description
Rev. 2.0, 08/02, page 163 of 788