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SH7021 Datasheet(PDF) 289 Page - Renesas Technology Corp |
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SH7021 Datasheet(HTML) 289 Page - Renesas Technology Corp |
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289 / 509 page  RENESAS 273 (1) (2) (3) Phase counting mode Start counting Phase counting mode Select phase counting mode Select flag setting condition Figure 10.42 Procedure for Selecting the Phase Counting Mode Phase Counting Operation: Figure 10.43 shows an example of phase counting mode operation. Table 10.16 lists the upcounting and downcounting conditions for TCNT2. The ITU counts on both rise and fall edges of TCLKA and TCLKB. The phase differential and overlap of TCLKA and TCLKB must be 1.5 cycles or more and the pulse width must be 2.5 cycles or more. TCNT2 value Increment Decrement TCLKB TCLKA TCNT2 Time Figure 10.43 Phase Counting Mode Operation Table 10.16 Up/Down Counting Conditions Counting Direction Increment Decrement TCLKB Rising High Falling Low Rising High Falling Low TCLKA Low Rising High Falling High Falling Low Rising |
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