h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 167

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

φ
Address bus
Data bus
Figure 6.34 Example of Idle Cycle Insertion when RAS Down Mode cannot be Continued
Figure 6.33 Example of Operation Timing in RAS Down Mode (RAST = 0, CAST = 0)
(
φ
Address bus
Data bus
(
,
)
(
(
(
)
,
)
)
)
Row address 1
T
p
DRAM space read
T
Row address
T
p
r
Column address 1
DRAM space read
T
T
c1
r
T
Column address 1
c2
T
c1
Normal space read
External address
T
1
T
c2
T
2
External address
High
Normal space
T
T
1
RU
read
Row address 2
Rev. 2.00, 03/04, page 135 of 534
T
DRAM space read
p
T
2
T
Column address 2
r
DRAM space
T
c1
Column address 2
read
T
c1
T
c2
T
c2