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7641 Datasheet(PDF) 259 Page - Renesas Technology Corp |
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7641 Datasheet(HTML) 259 Page - Renesas Technology Corp |
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259 / 385 page  Rev.2.00 Aug 28, 2006 page 128 of 148 7641 Group REJ09B0336-0200 APPLICATION 2.10 External devices connection 2.10.7 External devices connection example Connection example for controlling external memory is shown bellow. (1) External memory connection example : No Wait function Outline: In microprocessor mode the external memory is accessed. Figure 2.10.9 shows the external ROM and RAM example. 7641 Group AD15 RD WR AD14 AD0 15 EPROM CNVss RDY P31, P32 P4 P5 P6 P7 P8 5 8 8 5 8 DB0 DB7 SRAM CE A0 to A14 D0 to D7 8 A0 to A14 S DQ1 to DQ8 OE W OE 74F04 M5M27C256AK-10 Vcc = 4.15 to 5.25 V 24 MHz Memory map 2 000016 SFR area External RAM area 000816 001016 007016 047016 800016 FFFF16 M5M256BP to to SFR area Internal RAM area External RAM area External ROM area Fig. 2.10.9 External ROM and RAM example |
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