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H8SX/1663R Scheda tecnica(PDF) 288 Page - Renesas Technology Corp

Il numero della parte H8SX/1663R
Spiegazioni elettronici  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8SX/1663R Scheda tecnica(HTML) 288 Page - Renesas Technology Corp

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Section 9 Bus Controller (BSC)
Rev. 2.00 Sep. 24, 2008 Page 256 of 1468
REJ09B0412-0200
9.6.7
DACK and EDACK Signal Output Timing
When the DMAC or EXDMAC transfers data in single address mode, the output timing of the
DACK and EDACK signals can be changed by the DKC and EDKC bits in BCR1.
Figure 9.24 shows the output timing of the
DACK and EDACK signals. The DACK and EDACK
signals are asserted a half cycle earlier by setting the DKC or EDKC bits to 1.
T
1
T
2
Bus cycle
B
φ
Address bus
Write data
Write
Read data
Read
CSn
AS
RD
Data bus
Data bus
LHWR, LLWR
BS
RD/
WR
DKC, EDCK = 0
DKC, EDCK = 1
DACK or
EDACK
Notes: 1. n = 7 to 0
2. RDNn = 0
Figure 9.24
DACK and EDACK Signal Output Timing



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