h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 179

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

DRAM space read
External read
DRAM space read
T
T
T
T
T
T
T
T
T
T
p
r
c1
c2
1
2
3
i
c1
c2
φ
Address bus
,
Data bus
Idle cycle
Figure 6.49 Example of Idle Cycle Operation in RAS Down Mode
(Consecutive Reads in Different Areas) (IDLE1 = 0, IDLE0 = 1, IDLC1 = 0, IDLC0 = 1,
RAST = 0, and CAST = 0)
Table 6.7 shows whether there is an idle cycle insertion or not in the case of mixed accesses to
normal space and DRAM space.
Rev. 2.00, 03/04, page 147 of 534