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SH7032 Datasheet, PDF (534/687 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer | |||
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Section 20 Electrical Characteristics
CK
A21âA0
RAS
CAS
RD(Read)
WRH, WRL,
WR(Read)
AD15âAD0
DPH, DPL
(Read)
DACK0
DACK1
(Read)
RD(Write)
WRH, WRL,
WR(Write)
AD15âAD0
(Write)
DPH, DPL
(Write)
DACK0
DACK1
(Write)
Tp
Tr
Tc1
Tc2
tAD
tAD
Row
tRASD1
Column
Tc1
Tc2
Column
tRDD
tCASD2
tCASD3
tRSD
tRASD2
tCASD3
tRAC2*3
tACC2*2 tCAC2*tR1DS tRDH*4
tDACD1
tDACD2 tDACD1
tRDH*5
tDACD2
tWSD1
tWSD2
tWSD1
tWSD2
tWDD1
tWPDD1
tWDH tWDD1
tWPDH tWPDD1
tWDH
tWPDH
tDACD3
tDACD3
tDACD3 tDACD3
Notes: 1. For tCAC2, use tcyc à (n + 1) â 35 instead of tcyc à (n + 1) â tCASD2 â tRDS.
2. For tACC2, use tcyc à (n + 2) â 44 instead of tcyc à (n + 2) â tAD â tRDS.
3. For tRAC2, use tcyc à (n + 2.5) â 35 instead of tcyc à (n + 2.5) â tRASD2 â tRDS.
4. tRDH is measured from A21âA0 or CAS, whichever is negated first.
5. tRDH is measured from A21âA0, RAS, or CAS whichever is negated first.
Figure 20.27 DRAM Bus Cycle: (Long-Pitch, High-Speed Page Mode)
Rev. 7.00 Jan 31, 2006 page 508 of 658
REJ09B0272-0700
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