Datasheet

Section 10 I/O Ports
Page 686 of 1384 R01UH0310EJ0500 Rev. 5.00
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
10.16.5 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.
• PH3/CS7/OE-A*
3
/CKE-A*
2
/IRQ7-B
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bit OEE in DRAMCR of the bus controller, bit OES in PFCR2, bit CS7E in
PFCR0, and bit PH3DDR.
• Modes 1, 2, and 4 Modes 3 and 7 (EXPE = 1)
OEE 0 1
OES ⎯ 0 1
RMTS2 to
RMTS0
⎯ ⎯ Any of
areas 2 to
5 are
DRAM
space
Areas 2 to
5 are syn-
chronous
DRAM
space
CS7E 0 1 0 1 ⎯ ⎯
PH3DDR 0 1 0 1 0 1 0 1 ⎯ ⎯
PH3
input
PH3
output
PH3
input
CS7
output
PH3
input
PH3
output
PH3
input
CS7
output
OE-A*
3
output
CKE-A*
2
output
Pin
function
IRQ7-B input*
1