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MB89821 Datasheet(PDF) 21 Page - fujitsu semiconductor |
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MB89821 Datasheet(HTML) 21 Page - fujitsu semiconductor |
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21 / 43 page  21 MB89820 Series The following general-purpose registers are provided: General-purpose registers: An 8-bit register for storing data The general-purpose registers are 8 bits and located in the register banks of the memory. One bank contains eight registers and up to a total of 16 banks can be used on the MB89823 (RAM 256 × 8 bits). The bank currently in use is indicated by the register bank pointer (RP). Note: The number of register banks that can be used varies with the RAM size. MB89821 0100H to 013FH 8 banks MB89823 0100H to 017FH 16 banks MB89P825 0100H to 017FH 16 banks MB89PV820 0100H to 01FFH 32 banks This address = 0100 H + 8 × (RP) Memory area 16 banks R 0 R 1 R 2 R 3 R 4 R 5 R 6 R 7 Register Bank Configuration |
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