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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HD404814FS 데이터시트(PDF) 17 Page - Renesas Technology Corp |
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HD404814FS 데이터시트(HTML) 17 Page - Renesas Technology Corp |
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17 / 100 page  HD404818 Series 15 Functional Description Registers and Flags The MCU provides ten registers and two flags for CPU operations. They are illustrated in figure 5 and described in the following paragraphs. 30 30 30 30 30 30 0 0 0 13 95 1 (B) (A) (W) (X) (Y) (SPX) (SPY) (CA) (ST) (PC) (SP) 11 11 Accumulator B register W register X register Y register SPX register SPY register Carry Status Program counter Initial value: 0, no R/W Stack pointer Initial value: $3FF, no R/W 0 (V) 0 0 Initial value: Undefined, R/W Initial value: Undefined, R/W V register Initial value: 0, R/W Initial value: Undefined, R/W Initial value: Undefined, R/W Initial value: Undefined, R/W Initial value: Undefined, R/W Initial value: Undefined, R/W Initial value: Undefined, R/W Initial value: 1, no R/W Figure 5 Registers and Flags Accumulator (A), B Register (B): The accumulator and B register are 4-bit registers which hold the results of the arithmetic logic unit (ALU), and exchange data between memory, I/O, and other registers. |
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