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SH7020 Datasheet, PDF (490/509 Pages) Renesas Technology Corp – SuperH™ RISC engine | |||
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Tp
Tr
Tc
CK
tAD
tAD
A21âA0
Row
Column
RAS
CAS
tRASD1
tRAH
tRASD2
tRDD
tDS
tASC
tCASD1
tRSD
RD(Read)
WRH, WRL,
(Read)
DACK0
DACK1
(Read)
AD15âAD0
DPH, DPL
(Read)
tWCH
tDACD1 tDACD2
tACC1*2 tCAC1*1
tRAC1*3
tRDS
tRDH*4
RD(Write)
WRH, WRL,
(Write)
AD15âAD0
(Write)
tWSD3
tWCS
tWDD2
tWSD4
tWDH
DPH, DPL
(Write)
tWPDD2
tWPDH
DACK0
DACK1
(Write)
tDACD4 tDACD5
Notes: 1.
2.
3.
4.
For tCAC1, use tcyc à 0.65 â 35 (for 35% duty) or tcyc à 0.5 â 35 (for 50% duty)
instead of tcyc â tAD â tASC â tRDS.
For tACC1, use tcyc â 44 instead of tcyc â tAD â tRDS.
For tRAC1, use tcyc à 1.5 â 35 instead of tcyc à 1.5 â tRASD1 â tRDS.
tRDH is measured from A21âA0, RAS, or CAS, whichever is negated first.
Figure 19.24 DRAM Bus Cycle (Short Pitch, Normal Mode)
RENESAS 480
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