Hitachi SH7032 Hardware Manual page 314

TCNT2 value
TCLKB
TCLKA
Table 10.16 Up/Down-Counting Conditions
Counting
Direction Increment
TCLKB Rising
TCLKA Low
Phase
differential
TCLKA
TCLKB
Figure 10.44 Phase Differentials, Overlap, and Pulse Width in Phase Counting Mode
Increment
Figure 10.43 Phase Counting Mode Operation
High Falling
Rising High
Phase
differential
Overlap
TCNT2
Decrement
Low Rising
Falling High
Pulse
width
Overlap
Phase differential, overlap: 1.5 cycles minimum
Pulse width: 2.5 cycles minimum
Decrement
High Falling Low
Falling Low Rising
Pulse
width
Time
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