r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 679

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

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/CKE-A/IRQ7-B
• Modes 1, 2, 4, and 7 (EXPE = 1)
OEE
OES
RMTS2 to
RMTS0
CS7E
PH3DDR
Pin
function
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bit OEE of the bus controller, bit OES in PFCR2, bit CS7E in PFCR0, and bit
PH3DDR.
input
PH3
0
0
output
PH3
1

0
0
input
PH3
0
1
output
CS7
1
input
PH3
IRQ7-B input*
0
0
output
PH3
1

0
Rev. 1.00 Sep. 19, 2008 Page 649 of 1342
1
input
PH3
0
1
output
CS7
1
1
Areas 2 to
output*
DRAM
space
OE-A
5 are
Section 10 I/O Ports


REJ09B0467-0100
2
1
Areas 2 to
5 are syn-
chronous
CKE-A*
DRAM*
output*
space


2
3
3