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HD6437020 Datasheet, PDF (486/507 Pages) Hitachi Semiconductor – SuperH™ RISC engine | |||
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T1
T2
CK
A21âA0
HBS, LBS
CSn
RD (Read)
tAD
tCSD1
tRDD
tRDAC2*1
tCSD2
tRSD
AD15âAD0
DPH, DPL
(Read)
DACK0
DACK1
(Read)
tACC2*2
tDACD1
tWSD1
tRDS
tRDH*3
tWSD2
tDACD2
WRH, WRL,
WR (Write)
tWDD1
tWDH
AD15âAD0
(Write)
DPH, DPL
(Write)
tWPDD1
tWPDH
tDACD3
tDACD3
DACK0
DACK1
(Write)
Notes: 1.
2.
3.
For tRDAC2, use tcyc à (n + 1.65) â 35 (for 35% duty) or tcyc à (n + 1.5) â 35 (for
50% duty) instead of tcyc à (n + 2) â tRDD â tRDS.
For tACC2, use tcyc à (n + 2) â 44 instead of tcyc à (n + 2) â tAD (or tCSD1) â tRDS.
tRDH is measured from A21âA0, CSn, or RD, whichever is negated first.
Figure 19.22 Basic Bus Cycle: Two-State Access
HITACHI 478
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