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UPD75P218KB Datasheet(PDF) 10 Page - NEC |
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UPD75P218KB Datasheet(HTML) 10 Page - NEC |
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10 / 36 page  10 µPD75P218 3. 16K-BYTE MODE/32K-BYTE MODE SWITCHING FUNCTION 16K-byte mode or 32K-byte mode can be selected by setting the stack bank selection register (SBS). The µPD75P218 can then be used to evaluate the µPD75216A, µPD75217, and µPD75218. 3.1 DIFFERENCES BETWEEN 16K-BYTE MODE AND 32K-BYTE MODE Table 3-1 16K-byte Mode and 32K-byte Mode Differences Item Stack operation at subroutine call instruction execution Stack area CALL instruction TCALL instruction by GETI CALLF instruction BRA instruction CALLA instruction Program counter bit 14 Corresponding mask ROM version 32K-byte Mode 3-byte stack Bank 0 to bank 3 4 machine cycles 3 machine cycles Normal operation Corresponds to branch instruction, call instruction µPD75217 (S-DIP, QFP) µPD75218 (S-DIP, QFP) 16K-byte Mode 2-byte stack Bank 0 3 machine cycles 2 machine cycles Undefined operation 0 fixed µPD75216A (S-DIP, QFP) |
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