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7643 Datasheet(PDF) 303 Page - Renesas Technology Corp |
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7643 Datasheet(HTML) 303 Page - Renesas Technology Corp |
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303 / 424 page  Rev.2.00 Aug 28, 2006 page 182 of 202 7643 Group REJ09B0133-0200 APPLICATION 2.8 External device connection 2.8.7 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 2.8.9 shows the external ROM and RAM example. 7643 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 M5M5256BP-10 to to SFR area Internal RAM area External RAM area External ROM area Fig. 2.8.9 External ROM and RAM example |
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