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HC05 Datasheet(PDF) 149 Page - Motorola, Inc |
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HC05 Datasheet(HTML) 149 Page - Motorola, Inc |
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149 / 232 page  MC68HC05X16 Rev. 1 MOTOROLA 11-1 CPU CORE AND INSTRUCTION SET 11 11 CPU CORE AND INSTRUCTION SET This section provides a description of the CPU core registers, the instruction set and the addressing modes of the MC68HC05X16. 11.1 Registers The MCU contains five registers, as shown in the programming model of Figure 11-1. The interrupt stacking order is shown in Figure 11-2. 11.1.1 Accumulator (A) The accumulator is a general purpose 8-bit register used to hold operands and results of arithmetic calculations or data manipulations. Figure 11-1 Programming model Accumulator Index register Program counter Stack pointer Condition code register Carry / borrow Zero Negative Interrupt mask Half carry 70 70 15 7 0 0 15 7 0 0 0 0 0 0 0 0 1 1 70 1 1 1 H I N Z C 0 0 147 |
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