Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 519 of 926
REJ09B0283-0300
10.16.4 Pin Functions
Port H pins also function as bus control signal I/Os and external interrupt inputs. The
correspondence between the register specification and the pin functions is shown below.
• 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, 5, 6 3
*
2
, 7
EXPE — 0 1
CEE 0 1 — 0 1
CES — 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
CS7E0101———0101——
PH3DDR01010101— — 0101010101— —
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
Pin
function
IRQ7 input
*
1
Notes: 1. IRQ7 interrupt input pin when bit ITS7 is set to 1 in ITSR
2. Only in H8S/2678R Group.
• PH2/CS6/(IRQ6)
The pin function is switched as shown below according to the operating mode, bit PH2DDR,
and bit CS6E.
Operating
mode
1, 2, 4, 5, 6 3
*
2
, 7
EXPE — 0 1
CS6E 0 1 — 0 1
PH2DDR 0101010101
PH2
input
PH2
output
PH2
input
CS6
output
PH2
input
PH2
output
PH2
input
PH2
output
PH2
input
CS6
output
Pin function
IRQ6 interrupt input
*
1
Notes: 1. IRQ6 interrupt input pin when bit ITS6 is set to 1 in ITSR.
2. Only in H8S/2678R Group.