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H8/3028F Datasheet(PDF) 385 Page - Renesas Technology Corp |
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H8/3028F Datasheet(HTML) 385 Page - Renesas Technology Corp |
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385 / 923 page  Rev. 2.00, 09/03, page 355 of 890 Example of Phase Counting Mode: Figure 9.30 shows an example of operations in phase counting mode. Table 9.5 lists the up-counting and down-counting conditions for 16TCNT2. In phase counting mode both the rising and falling edges of TCLKA and TCLKB are counted. The phase difference between TCLKA and TCLKB must be at least 1.5 states, the phase overlap must also be at least 1.5 states, and the pulse width must be at least 2.5 states. 16TCNT2 value Counting up Counting down TCLKB TCLKA Figure 9.30 Operation in Phase Counting Mode (Example) Table 9.5 Up/Down Counting Conditions Counting Direction Up-Counting Down-Counting TCLKB pin ↑ High ↓ Low HIgh ↓ Low ↑ TCLKA pin Low ↑ High ↓↓ Low ↑ HIgh TCLKA TCLKB Phase difference Phase difference Pulse width Pulse width Overlap Overlap Phase difference and overlap: Pulse width: at least 1.5 states at least 2.5 states Figure 9.31 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode |
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