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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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7733 Scheda tecnica(PDF) 678 Page - Renesas Technology Corp |
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7733 Scheda tecnica(HTML) 678 Page - Renesas Technology Corp |
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678 / 940 page  CONNECTING EXTERNAL DEVICES 7735 Group User’s Manual 12–2 Functions for connecting external devices are described in this chapter. Reading or writing data from or to external devices are performed by the bus interface unit (BIU). (Refer to _ section “2.2 Bus interface unit.”) The BIU operates on the basis of internal enable signal E (usually, _ internal clock φ divided by 2) but does not output internal enable signal E to the external. The BIU outputs ____ ____ ____ signals RDE, WEL, and WEH. ____ ____ ____ _ Signals RDE, WEL, and WEH are generated from internal enable signal E and are output at the same timing _ as that of internal enable signal E. When external devices are accessed, the BIU outputs some of these signals, in other words, outputs only signals which are required for the access at that time. 12.1 Signals required for accessing external devices |
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