HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 326

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 6 Bus Controller (BSC)
Rev.7.00 Mar. 18, 2009 page 258 of 1136
REJ09B0109-0700
Precharge-sel
DQMU, DQML
Address bus
HWR, LWR
Data bus
CKE
CAS
RAS
WE
RD
φ
Figure 6.75 Example of Idle Cycle Operation in RAS Down Mode
PALL ACTV READ
Column
address
T
p
(Write after Read) (IDLC = 0, CAS Latency 2)
Continuous synchronous
DRAM space read
address
address
Row
Row
T
r
T
Column address 1
c1
T
cl
High
High
T
c2
External space read
T
External address
External address
1
NOP
T
2
T
3
Idle cycle
T
Continuous synchronous
DRAM space write
i
Column address 2
T
c1
WRIT
T
Cl
NOP
T
c2