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HD6432351 Datasheet(PDF) 486 Page - Renesas Technology Corp |
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HD6432351 Datasheet(HTML) 486 Page - Renesas Technology Corp |
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486 / 1025 page  Section 10 16-Bit Timer Pulse Unit (TPU) Rev. 3.00 Sep 15, 2006 page 452 of 988 REJ09B0330-0300 10.3 Interface to Bus Master 10.3.1 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 10.2. Bus interface H Internal data bus L Bus master Module data bus TCNTH TCNTL Figure 10.2 16-Bit Register Access Operation [Bus Master ↔ ↔ ↔ ↔ TCNT (16 Bits)] 10.3.2 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. |
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