HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 268

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8. 16-Bit Timer
Example of Phase Counting Mode: Figure 8.30 shows an example of operations in phase
counting mode. Table 8.5 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.
Table 8.5
Counting
Direction
TCLKB pin
TCLKA pin
Rev.4.00 Aug. 20, 2007 Page 224 of 638
REJ09B0395-0400
TCLKA
TCLKB
TCLKB
TCLKA
Figure 8.31 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
16TCNT2 value
Up/Down Counting Conditions
Phase
difference
Figure 8.30 Operation in Phase Counting Mode (Example)
Up-Counting
↑
Low
Counting up
Overlap
High
↑
Phase
difference
↓
High
Overlap
Low
↓
Pulse width
Phase difference and overlap:
Pulse width:
Down-Counting
High
↓
↓
Low
Pulse width
Counting down
Low
↑
at least 1.5 states
at least 2.5 states
↑
High