Datasheet

Section 6 Bus Controller (BSC)
R01UH0309EJ0500 Rev. 5.00 Page 273 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
T
p
Address bus External address Column address Column address 2
External address
Row
address
Column
address
Data bus
T
r
T
c1
T
cl
T
c2
T
c1
T
c2
Continuous synchronous
DRAM space read
Continuous synchronous
DRAM space read
External
space read
T
2
T
cl
T
1
RAS
CAS
WE
CKE
High
PALL ACTV READ
NOP NOPREAD
DQMU, DQML
Precharge-sel
Row
address
φ
Figure 6.65 Example of Operation Timing in RAS Down Mode
(BE = 1, CAS Latency 2)