h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 305

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

9.11.3
In modes 4 to 6, each pin on port D automatically becomes one of the data bus I/O pins (D15 to
D8). In mode 7, each pin on port D functions as an I/O port and can be specified to function as an
input or output bit by bit.
The function of pins on port D are as listed in tables 9.23 (1) and 9.23 (2).
Table 9.23 (1) Port D Pin Functions (H8S/2646, H8S/2646R, H8S/2645)
Pins
PD7/D15, PD6/D14,
PD5/D13, PD4/D12,
PD3/D11, PD2/D10,
PD1/D9, PD0/D8
Table 9.23 (2) Port D Pin Functions (H8S/2648, H8S/2648R, H8S/2647)
Pins
PD7/D15/SEG9 to
PD0/D8/SEG16
Note: Modes 4 and 5 are expanded modes with on-chip ROM disabled.
If segment output is selected, data input/output and interfacing to external ROM are no
longer possible. Therefore segment output settings should not be made in these modes.
Pin Functions
Method of Selection and Pin Function
Method of Selection and Pin Function
Pin functions are changed by a combination of the operating mode and the
PDDDR.
Operating mode
PDnDDR
Pin function
Setting of
SGS3 to SGS0
Operating
mode
PDDDR
Pin function
D15 to D8 I/O PD7 to PD0
Modes 4 to 6
Data bus I/O (D15 to D8)
—
Modes 4 to 6
—
Rev. 5.00 Sep 22, 2005 page 279 of 1136
input
Port
0
Mode 7
PD7 to PD0
PDn input
output
1
0
Section 9 I/O Ports
REJ09B0257-0500
Mode 7
SEG output
PDn output
SEG9 to
SEG16
n = 7 to 0
—
—
1