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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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H8S2245 데이터시트(PDF) 359 Page - Renesas Technology Corp |
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H8S2245 데이터시트(HTML) 359 Page - Renesas Technology Corp |
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359 / 818 page  Section 9 16-Bit Timer Pulse Unit (TPU) Rev.3.00 Mar. 26, 2007 Page 317 of 772 REJ09B0355-0300 9.3 Interface to Bus Master 9.3.1 16-Bit Registers TCNT and TGR are 16-bit registers. As the data bus to the bus master is 16 bits wide, these registers can be read and written to in 16-bit units. These registers cannot be read or written to in 8-bit units; 16-bit access must always be used. An example of 16-bit register access operation is shown in figure 9.2. Bus interface H Internal data bus L Bus master Module data bus TCNTH TCNTL Figure 9.2 16-Bit Register Access Operation [Bus Master ↔ ↔ ↔ ↔ TCNT (16 Bits)] 9.3.2 8-Bit Registers Registers other than TCNT and TGR are 8-bit. As the data bus to the CPU is 16 bits wide, these registers can be read and written to in 16-bit units. They can also be read and written to in 8-bit units. Examples of 8-bit register access operation are shown in figures 9.3 to 9.5. |
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