10.16.4 Pin Functions - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

10.16.4 Pin Functions

Port H pins also function as bus control signal I/Os and interrupt inputs. The correspondence
between the register specification and the pin functions is shown below.
&6:/2( 2(/CKE*
&6: &6: 2( 2(
PH3/&6:
The pin function is switched as shown below according to the operating mode, bit EXPE, bit OEE,
bit OES, bit CS7E, and bit PH3DDR.
Operating
mode
EXPE
2EE
0
2ES
—
Area —
2 to 5
CS7E 0 1
PH3DDR 0 1 0 1
&6:
Pin PH3 PH3 PH3
function input output input output
Notes: 1. ,54: interrupt input pin when bit ITS7 is set to 1 in ITSR
2. Not used in H8S/2378 series.
&69/(,549 ,549)
&69 &69 ,549 ,549
PH2/&69
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
CS6E, and bit PH2DDR.
Operating
mode
EXPE
CS6E 0
PH2DDR 0
Pin function PH2
input output
,549 interrupt input pin when bit ITS6 is set to 1 in ITSR.
Note:
,54:)
,54: ,54:
2
/(,54:
1, 2, 4, 5, 6
—
1
0
— Normal
space
or
DRAM
space
0 1 —
0 1 0 1 —
&6: 2(
PH3 PH3 PH3
input output input output output
1, 2, 4, 5, 6
—
1
1 0 1
&69
PH2 PH2
input output
,549 interrupt input*
0
—
1 —
syn- —
chronous
DRAM
2
space*
— — 0
— 0 1 0 1
2
CKE* PH3 PH3 PH3 PH3
output input output input output
,54: input* 1
7
0
— 0
0 1 0
PH2 PH2 PH2
input output input output
7
1
0
0
— —
1 0
0 1 0 1 0
&6:
PH3 PH3 PH3 PH3
input output input output input
1
1
1 0 1
&69
PH2 PH2
input output
Rev. 1.0, 09/01, page 491 of 904
1
1
Normal syn-
space chronous
or DRAM
2
DRAM space*
space
1 — —
1 — —
2
&6: 2(
CKE*
output output output