h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 288

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

Section 9 I/O Ports
9.8.3
Port A pins also function as address bus outputs and LCD driver output pins (SEG21 to SEG24
and COM1 to COM4). The pin functions differ between modes 4 to 6, and mode 7. Port A pin
functions are shown in tables 9.13 and 9.14.
Table 9.13 PA7 to PA4 Pin Functions
Rev. 5.00 Sep 22, 2005 page 262 of 1136
REJ09B0257-0500
Pin
H8S/2646
H8S/2646R
H8S/2645
H8S/2648
H8S/2648R
H8S/2647
Pin Functions
PA7/A23/
SEG24 to
PA4/A20/
SEG21
PA7/A23/
SEG40 to
PA4/A20/
SEG37
Selection Method and Pin Functions
Switches as follows according to the combinations of bits SGS3 to SGS0 of LCD
driver LPCR, bits AE3 to AE0 of PFGR, and bits PA7DDR to PA4DDR of PADDR.
Setting of
SGS3 to SGS0
Operating
mode
Setting of AE3
to AE0
PAnDDR
Pin function
Address
output
enabled
A23 to
output
A20
—
Modes 4 to 6
PA7 to
Address output
input
PA4
0
disabled
Port
PA7 to
output
PA4
1
PA7 to
input
PA4
0
Mode 7
—
PA7 to
output
PA4
1
H8S/2646R,
H8S/2646,
H8S/2645
SEG24 to
SEG21
output
—
—
—
SEG output
H8S/2648R,
H8S/2648,
H8S/2647
SEG40 to
SEG37
n = 7 to 4
output
—
—
—