r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 302

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 Bus Controller (BSC)
Rev. 1.00 Sep. 19, 2008 Page 272 of 1342
REJ09B0467-0100
Figure 6.72 Example of DACK/EDACK Output Timing when DDS = 1 or EDDS = 1
Read
Write
DACK or EDACK
DQMU, DQML
DQMU, DQML
Precharge-sel
Address bus
SDRAMφ
Data bus
Data bus
CKE
CKE
RAS
RAS
CAS
CAS
WE
WE
φ
Column address
PALL
PALL
T
p
Row address
Row address
ACTV
ACTV
T
r
READ
High
High
NOP
T
c1
Column address
WRIT
T
cl
NOP
NOP
T
c2