HD6432670 Hitachi, HD6432670 Datasheet - Page 468

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Note: Only in H8S/2678R Series.
10.1
Port 1 is an 8-bit I/O port that also has other functions. The port 1 has the following registers.
10.1.1
The individual bits of P1DDR specify input or output for the pins of port 1.
P1DDR cannot be read; if it is, an undefined value will be read.
Bit
7
6
5
4
3
2
1
0
Rev. 2.0, 04/02, page 422 of 906
Port
Port
H
Port 1 data direction register (P1DDR)
Port 1 data register (P1DR)
Port 1 register (PORT1)
General I/O port
also functioning
as interrupt inputs
and bus control
I/Os
Bit Name
P17DDR
P16DDR
P15DDR
P14DDR
P13DDR
P12DDR
P11DDR
P10DDR
Description
Port 1
Port 1 Data Direction Register (P1DDR)
Initial Value
0
0
0
0
0
0
0
0
PH3/
PH2/
PH1/
PH0/
Modes 1
and 5
/
/(
/
/
Modes 2
and 6
/CKE*/(
R/W
W
W
W
W
W
W
W
W
/SDRAM *
/
)
*
Mode 4
Description
When a pin function is specified to a general purpose
I/O, setting this bit to 1 makes the corresponding port
1 pin an output pin, while clearing this bit to 0 makes
the pin an input pin.
)
PH3/
(
PH2/
PH1/
SDRAM *
PH0/
*
EXPE = 1
)
/
/(
/
/
/CKE*/
Modes 3*, 7
/
/
)
PH3/(
PH2/(
PH1/SDRAM *
PH0
EXPE = 0
)
)
Only PH2
and PH3
are
Schmitt-
triggered
inputs
when
used as
the IRQ
input
Output
Input/
Type