Datasheet

Section 10 I/O Ports
Rev.7.00 Mar. 18, 2009 page 543 of 1136
REJ09B0109-0700
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.
Note: Only modes 1 and 2 are supported on ROM-less versions.
• PH3/CS7/OE/CKE
*
2
/(IRQ7)
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
1, 2, 4 7
EXPE ⎯ 0 1
OEE 0 1 ⎯ 0 1
OES ⎯ 0 1 ⎯ 0 1
Area
2 to 5
⎯ ⎯ Normal
space
or
DRAM
space
syn-
chronous
DRAM
space
*
2
⎯ ⎯ ⎯ Normal
space
or
DRAM
space
syn-
chronous
DRAM
space
*
2
CS7E 0 1 0 1 ⎯ ⎯ ⎯ 0 1 0 1 ⎯ ⎯
PH3DDR 0 1 0 1 0 1 0 1 ⎯ ⎯ 0 1 0 1 0 1 0 1 0 1 ⎯ ⎯
Pin
function
PH3
input
PH3
output
PH3
input
CS7
output
PH3
input
PH3
output
PH3
input
CS7
output
OE
output
CKE
*
2
output
PH3
input
PH3
output
PH3
input
PH3
output
PH3
input
CS7
output
PH3
input
PH3
output
PH3
input
CS7
output
OE
output
CKE
*
2
output
IRQ7 input
*
1
Notes: 1. IRQ7 interrupt input pin when bit ITS7 is set to 1 in ITSR
2. Not used in the H8S/2378 0.18μm F-ZTAT Group, H8S/2377, H8S/2375, and
H8S/2373.
• PH2/CS6/(IRQ6)
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
CS6E, and bit PH2DDR.
Operating
mode
1, 2, 4 7
EXPE ⎯ 0 1
CS6E 0 1 ⎯ 0 1
PH2DDR 0 1 0 1 0 1 0 1 0 1
Pin function PH2
input
PH2
output
PH2
input
CS6
output
PH2
input
PH2
output
PH2
input
PH2
output
PH2
input
CS6
output
IRQ6 interrupt input
*
Note: * IRQ6 interrupt input pin when bit ITS6 is set to 1 in ITSR.