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C161 Datasheet(PDF) 188 Page - Infineon Technologies AG |
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C161 Datasheet(HTML) 188 Page - Infineon Technologies AG |
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188 / 400 page  &3, 7KH([WHUQDO%XV ,QWHUIDFH User’s Manual 9-24 1999-08 Definition of Address Areas The four register pairs BUSCON4/ADDRSEL4...BUSCON1/ADDRSEL1 allow to define 4 separate address areas within the address space of the C161PI. Within each of these address areas external accesses can be controlled by one of the four different bus modes, independent of each other and of the bus mode specified in register BUSCON0. Each ADDRSELx register in a way cuts out an address window, within which the parameters in register BUSCONx are used to control external accesses. The range start address of such a window defines the upper address bits, which are not used within the address window of the specified size (see table below). For a given window size only those upper address bits of the start address are used (marked “R”), which are not implicitly used for addresses inside the window. The lower bits of the start address (marked “x”) are disregarded. Table 9-6 Address Window Definition Bit field RGSZ Resulting Window Size Relevant Bits (R) of Start Addr. (A12...) 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 x x 4 KByte 8 KByte 16 KByte 32 KByte 64 KByte 128 KByte 256 KByte 512 KByte 1 MByte 2 MByte 4 MByte 8 MByte Reserved. RRRRRRRRRR RR RRRRRRRRRR Rx RRRRRRRRRR x x RRRRRRRRRx x x RRRRRRRRx x x x RRRRRRRx x x x x RRRRRR xxxx xx RRRRR xxxxx xx RRRR xxxxxx xx R R R xxxxxxx xx R R xxxxxxxx xx R xxxxxxxxx xx |
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