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H8SX/1663R Datasheet(PDF) 555 Page - Renesas Technology Corp |
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H8SX/1663R Datasheet(HTML) 555 Page - Renesas Technology Corp |
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555 / 1504 page  Section 11 EXDMA Controller (EXDMAC) Rev. 2.00 Sep. 24, 2008 Page 523 of 1468 REJ09B0412-0200 Figures 11.44 to 11.47 show operation timing examples for various conditions. 3 cycles Last transfer cycle B φ EDREQ EDRAK Bus cycle ETEND DTE bit Bus release Bus release EXDMA read EXDMA write Bus release EXDMA read EXDMA write 0 1 Figure 11.44 External Request/Normal Transfer Mode/Cycle Steal Mode (No Conflict/Dual Address Mode/Low Level Sensing) One bus cycle Last transfer cycle B φ EDREQ EDRAK Bus cycle ETEND EDACK CPU operation CPU cycle CPU cycle EXDMAC single transfer cycle CPU cycle CPU cycle EXDMAC single transfer cycle External space External space External space External space Figure 11.45 External Request/Normal Transfer Mode/Cycle Steal Mode (CPU Cycles/Single Address Mode/Low Level Sensing) |
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