r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 686

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 10 I/O Ports
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
• Mode 7 (EXPE = 0)
OEE
OES
RMTS2 to RMTS0
CS7E
PH3DDR
Pin function
Notes: 1. IRQ7-B input when the ITS7 bit in ITSR is 1.
Rev. 1.00 Sep. 19, 2008 Page 658 of 1270
REJ09B0466-0100
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.
2. OE-A/CKE-A output when the OES bit in PFCR2 is 1.
3. Not supported in the H8S/2426 Group.
input
PH3
0
0
output
PH3
1

0
0
input
PH3
0
1
PH3 input
output
CS7
1
0
input
PH3
IRQ7-B input*
0
0
IRQ7-B input*
output
PH3
1





0
1
input
PH3
0
1
1
output
CS7
1
1
PH3 output
Areas 2 to
output*
DRAM
space
1
OE-A
5 are


2
1
Areas 2 to
5 are syn-
chronous
CKE-A*
output*
space*
DRAM


3
2
3