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H8SX/1663 Datenblatt(PDF) 341 Page - Renesas Technology Corp

Teilenummer H8SX/1663
Bauteilbeschribung  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
PDF  1158 Pages
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Hersteller  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8SX/1663 Datenblatt(HTML) 341 Page - Renesas Technology Corp

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Section 6 Bus Controller (BSC)
Rev.1.00 Jun. 07, 2006 Page 289 of 1102
REJ09B0294-0100
(5) When DKC = 1
With DKC = 1, the
DACK signal is asserted a half cycle earlier compared to the case when DKC
= 0.
In fast-page access, the
DACK signal continues to be low. In this case, bus cycles can be
distinguished by the
BS output timing.
Figure 6.88 shows an output timing example of the
DACK signal when DKC = 1 and DDS = 1.
Figure 6.89 shows an output timing example of the
DACK signal when DKC = 1 and DDS = 0.
T
p
T
r
T
c1
T
c2
T
c1
T
c2
Address bus
Row address
Column address 2
Column address 1
SD
φ
CS
Precharge-sel
RAS
CAS
WE
CKE
PALL
ACTV
NOP
NOP
WRIT
WRIT
DQMLU
DQMLL
D7 to D0
BS
DACK
RD/
WR
D15 to D8
Row
address
High
Figure 6.88 Output Timing Example of
DACK when DKC = 1 and DDS = 1 (Write)



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