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| D12320VF25IV Datasheet, PDF (239/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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Section 6 Bus Controller
EXTAL
Address
RD
RAS
CAS, LCAS
Data bus
DRAM space read
Tp Tr
Tc1 Tc2
External read
DRAM space read
T1
T1
T2
T3 Tc1 Tc1 Tc2
Idle cycle
Figure 6.35 (a) Example of Idle Cycle Operation in RAS Down Mode (ICIS1 = 1)
EXTAL
Address
RD
HWR
RAS
CAS, LCAS
Data bus
DRAM space read
Tp Tr
Tc1 Tc2
External read
DRAM space write
T1
T1
T2
T3 Tc1 Tc1 Tc2
Idle cycle
Figure 6.35 (b) Example of Idle Cycle Operation in RAS Down Mode (ICIS0 = 1)
Rev.6.00 Sep. 27, 2007 Page 207 of 1268
REJ09B0220-0600
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