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H8SX1663 数据表(PDF) 274 Page - Renesas Technology Corp |
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H8SX1663 数据表(HTML) 274 Page - Renesas Technology Corp |
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274 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 222 of 1102 REJ09B0294-0100 6.9.6 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 6.33 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 BS RD/ WR Note: n = 3 to 7 Address Read data Address Write data Read Write Figure 6.33 Access Timing of 3 Address Cycles (ADDEX = 1) |
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