Pin Functions - Renesas H8S/2368 Series Hardware Manual

Bit Bit Name Initial Value
3 A19E 1
2 A18E 1
1 A17E 1
0 A16E 1
9.8.8

Pin Functions

Port A pins also function as the pins for address outputs and interrupt inputs. The correspondence
between the register specification and the pin functions is shown below.
•
PA7/A23/CS7/IRQ7
The pin function is switched as shown below according to the operating mode, bit EXPE, bits
A23E and CS7E, bits ITS7 to ITS5 in ITSR, and bit PA7DDR.
Operating
mode
EXPE
A23E
CS7E 0
PADDR 0 1
Pin function PA PA
input output
Note: * IRQ7 input when ITS7 = 0.
R/W Description
R/W Address 19 Enable
Enables or disables output for address output 19 (A19).
0: DR output when PA3DDR = 1
1: A19 output when PA3DDR = 1
R/W Address 18 Enable
Enables or disables output for address output 18 (A18).
0: DR output when PA2DDR = 1
1: A18 output when PA2DDR = 1
R/W Address 17 Enable
Enables or disables output for address output 17 (A17).
0: DR output when PA1DDR = 1
1: A17 output when PA1DDR = 1
R/W Address 16 Enable
Enables or disables output for address output 16 (A16).
0: DR output when PA0DDR = 1
1: A16 output when PA0DDR = 1
1, 2, 4
—
0 1
1 —
0 1 0
PA CS7 PA
Address
input output output output
0
—
—
1 0 1 0
PA PA PA
input output input
IRQ7 interrupt input*
Rev. 2.00, 05/03, page 345 of 820
7
1
0
0 1
1
PA PA CS7 PA
output input output input
1
—
0 1
Address
output