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H8SX/1663R Folha de dados(PDF) 306 Page - Renesas Technology Corp

Nome de Peças H8SX/1663R
Descrição Electrónicos  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
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H8SX/1663R Folha de dados(HTML) 306 Page - Renesas Technology Corp

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Section 9 Bus Controller (BSC)
Rev. 2.00 Sep. 24, 2008 Page 274 of 1468
REJ09B0412-0200
9.9.6
Address Cycle Control
An extension cycle (Tmaw) can be inserted between Tma1 and Tma2 cycles to extend the
AH
signal output period by setting the ADDEX bit in MPXCR. By inserting the Tmaw cycle, the
address setup for
AH and the AH minimum pulse width can be assured.
Figure 9.33 shows the access timing when the address cycle is three cycles.
T
ma1
T
maw
T
ma2
T
2
T
1
B
φ
Address bus
D15 to D0
D15 to D0
Address cycle
Data cycle
CSn
LHWR
LLWR
AH
RD
DACK or EDACK
BS
RD/
WR
Note: n = 3 to 7
Address
Read data
Address
Write data
Read
Write
Figure 9.33 Access Timing of 3 Address Cycles (ADDEX = 1)



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