r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 320

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

Section 6 Bus Controller (BSC)
Table 6.12 shows whether there is an idle cycle insertion or not in the case of mixed accesses to
normal space and DRAM space/continuous synchronous DRAM space.
Table 6.12 Idle Cycles in Mixed Accesses to Normal Space and DRAM Continuous
Rev. 1.00 Sep. 19, 2008 Page 292 of 1270
REJ09B0466-0100
Previous Access
Normal space read
DRAM/continuous
synchronous
DRAM*
space read
Synchronous DRAM Space
Next Access
Normal space read
(different area)
DRAM*/continuous
synchronous DRAM
space read
Normal space write
DRAM*/continuous
synchronous DRAM
space write
Normal space read
DRAM*/continuous
synchronous DRAM
space read
Normal space write
DRAM*/continuous
synchronous DRAM
space write
ICIS2
















ICIS1
0
1
0
1




0
1
0
1




ICIS0




0
1
0
1




0
1
0
1
DRMI









0
1

0
1

0
1

0
1
IDLC

0
1

0
1

0
1

0
1


0
1


0
1


0
1


0
1
Idle cycle
Disabled
1 state inserted
2 states inserted
Disabled
1 state inserted
2 states inserted
Disabled
1 state inserted
2 states inserted
Disabled
1 state inserted
2 states inserted
Disabled
Disabled
1 state inserted
2 states inserted
Disabled
Disabled
1 state inserted
2 states inserted
Disabled
Disabled
1 state inserted
2 states inserted
Disabled
Disabled
1 state inserted
2 states inserted