HD6413003RF Datasheet, PDF (370/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Example of Phase Counting Mode: Figure 10-44 shows an example of operations in phase
counting mode. Table 10-9 lists the up-counting and down-counting conditions for TCNT2.
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. See figure 10-45.
TCNT2 value
Counting up
Counting down
TCLKB
TCLKA
Time
Figure 10-44 Operation in Phase Counting Mode (Example)
Table 10-9 Up/Down Counting Conditions
Counting Direction Up-Counting
TCLKB
High
Low
TCLKA
Low
High
Down-Counting
High
Low
Low
High
Phase
difference
Phase
difference
Pulse width
Pulse width
TCLKA
TCLKB
Overlap
Overlap
Phase difference and overlap: at least 1.5 states
Pulse width:
at least 2.5 states
Figure 10-45 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
352