HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 322

• 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 254 of 1136
REJ09B0109-0700
UCAS, LCAS
UCAS, LCAS
Address bus
Address bus
(Consecutive Reads in Different Areas) (IDLC = 0, RAST = 0, CAST = 0)
Data bus
Data bus
HWR
Figure 6.70 Example of Idle Cycle Operation in RAS Down Mode
Figure 6.71 Example of Idle Cycle Operation in RAS Down Mode
RAS
RAS
RD
RD
φ
φ
(Write after Read) (IDLC = 0, RAST = 0, CAST = 0)
T
T
p
p
DRAM space read
DRAM space read
T
T
r
r
T
T
c1
c1
T
T
c2
c2
T
T
1
1
External read
External read
T
T
2
2
T
T
3
3
Idle cycle
Idle cycle
DRAM space write
T
DRAM space read
T
i
i
T
T
c1
c1
T
T
c2
c2