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UPD754202GS Datasheet(PDF) 14 Page - NEC |
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UPD754202GS Datasheet(HTML) 14 Page - NEC |
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14 / 66 page  14 µPD754202, 754202(A) 5. MEMORY CONFIGURATION • Program Memory (ROM): 2048 × 8 bits (0000H-07FFH) • Addresses 0000H and 0001H Vector table wherein the program start address and the values set for the RBE and MBE at the time a RESET signal is generated are written. Reset start is possible from any address. • Addresses 0002H to 000DH Vector table wherein the program start address and values set for the RBE and MBE by the vectored interrupts are written. Interrupt service can start from any address. • Addresses 0020H to 007FH Table area referenced by the GETI instructionNote. Note The GETI instruction realizes a 1-byte instruction on behalf of any 2-byte instruction, 3-byte instruction, or two 1-byte instructions. It is used to decrease the number of program steps. • Data Memory (RAM) • Data area: 128 words × 4 bits (000H-07FH) • Peripheral hardware area: 128 words × 4 bits (F80H-FFFH) |
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