HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 378

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

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.
Table 10-9 Up/Down Counting Conditions
Counting Direction
TCLKB
TCLKA
TCLKA
TCLKB
TCLKB
TCLKA
Figure 10-45 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
TCNT2 value
Phase
difference
Figure 10-44 Operation in Phase Counting Mode (Example)
Counting up
Low
Overlap
Up-Counting
Phase
difference
High
Overlap
High
366
Pulse width
Low
Phase difference and overlap:
Pulse width:
Down-Counting
High
Low
Pulse width
Counting down
at least 1.5 states
at least 2.5 states
Low
Time
High