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UPD70741 Datasheet(PDF) 16 Page - NEC |
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UPD70741 Datasheet(HTML) 16 Page - NEC |
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16 / 112 page  µPD70741 16 3.2.2 I/O map Figure 3-2 shows the I/O map of the V821. The internal 4-Gbyte memory space is divided into blocks of 1G byte each. Each block has a linear address space of 16M bytes. (The lower 24 bits of a 32-bit address are output.) The V821 reserves I/O addresses C0000000H-FFFFFFFFH (I/O block 3) as an internal I/O space. Each unit is mapped to this internal I/O space. See Section 3.4 for details of the configuration of the internal I/O space. Figure 3-2. I/O Map Block 3 (Internal I/O) Block 2 Block 1 Block 0 FFFFFFFFH C0000000H BFFFFFFFH 80000000H 7FFFFFFFH 40000000H 3FFFFFFFH 00000000H |
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