r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 681

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

• PH1/CS5/RAS5/SDRAMφ
Notes: *
• PH0/CS4/RAS4/WE*
Note:
SDPSTP
Operating
mode
EXPE
RMTS2 to
RMTS0
CS5E
PH1DDR
Pin
function
Operating
mode
EXPE
CS4E
RMTS2 to
RMTS0
PH0DDR
Pin
function
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bits RMTS2 to RMTS0 in DRAMCR of the bus controller, bit SDPSTP in
SCKCR of the clock pulse generator, bit CS5E in PFCR0 and bit PH1DDR.
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bits RMTS2 to RMTS0 in DRAMCR of the bus controller, bit CS4E in
PFCR0, and bit PH0DDR.
*
input
input
PH0
Area 5 is normal space
PH1
Not supported in the H8S/2456 Group.
Not supported in the H8S/2456 Group.
0
0
0

0
output
PH1
output
1
PH0
1
input
PH1
0
normal space
input
PH0
0
1
Area 4 is
output
1, 2, 4
CS5
1, 2, 4
1


output
CS4
1
input
PH1
Area 5 is DRAM
0
0
Area 4
DRAM
output
1
space
RAS4
output
space
PH1

is
1
output
chronous
RAS5
Areas 2
to 5 are
DRAM *

output
space
1
WE *
syn-

input
PH1
0
input
PH0


1
0
0
output
PH1
1


0
output
PH0
input
1
Area 5 is normal space
PH1
0
Rev. 1.00 Sep. 19, 2008 Page 651 of 1342
0
output
input
PH0
PH1
1
0

0
input
PH1
output
0
PH0
7
1
1
output
CS5
1
1
7
normal space
input
PH0
0
Area 4 is
input
PH1
Area 5 is DRAM
0
output
1
CS4
Section 10 I/O Ports
0
1
space
output
PH1
REJ09B0467-0100
1
Area 4
DRAM
output
space
RAS4
1
output
RAS5

is

1
chronous
Areas 2
DRAM *
to 5 are
SDRAMφ
output
space
output *
WE *
syn-






0