Hitachi H8S/2378, H8S/2378R Series Hardware Manual page 596

4. Phase counting mode 4
Figure 11.28 shows an example of phase counting mode 4 operation, and table 11.35
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5)
TCLKC (channels 2 and 4)
TCLKB (channels 1 and 5)
TCLKD (channels 2 and 4)
TCNT value
Figure 11.28 Example of Phase Counting Mode 4 Operation
Table 11.35 Up/Down-Count Conditions in Phase Counting Mode 4
TCLKA (Channels 1 and 5)
TCLKC (Channels 2 and 4)
High level
Low level
High level
Low level
Legend
: Rising edge
: Falling edge
Rev. 1.0, 09/01, page 552 of 904
Up-count
TCLKB (Channels 1 and 5)
TCLKD (Channels 2 and 4)
Low level
High level
High level
Low level
Down-count
Time
Operation
Up-count
Don't care
Down-count
Don't care