r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 323

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

Figure 6.94 Example of Timing for Idle Cycle Insertion in Case of Consecutive Read and
Write Accesses to Continuous Synchronous DRAM Space in RAS Down Mode
DQMU, DQML
Precharge-sel
Address bus
Data bus
CKE
CAS
RAS
WE
φ
PALL ACTV READ
(SDWCD = 1, CAS Latency 2)
Column
address
T
p
Continuous synchronous
DRAM space read
address
address
Row
Row
T
r
T
c1
address
Column
T
cl
High
T
c2
Rev. 1.00 Sep. 19, 2008 Page 295 of 1270
Idle cycle
Continuous synchronous
DRAM space write
NOP
T
External address
i
T
Section 6 Bus Controller (BSC)
c1
WRIT
T
c2
REJ09B0466-0100