SH7615 Datasheet, PDF (745/925 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH
RISC engine Family/SH7600 Series

Examples of Phase Counting Mode Operation: In phase counting mode, TCNT counts up or
down according to the phase difference between two external clocks. There are four modes,
according to the count conditions.
• Phase counting mode 1
Figure 16.26 shows an example of phase counting mode 1 operation, and table 16.8
summarizes the TCNT up/down-count conditions.
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
TCNT value
Up-count
Down-count
Time
Figure 16.26 Example of Phase Counting Mode 1 Operation
Table 16.8 Up/Down-Count Conditions in Phase Counting Mode 1
TCLKA (Channel 1)
TCLKC (Channel 2)
High level
Low level
High level
Low level
Notes:
: Rising edge
: Falling edge
TCLKB (Channel 1)
TCLKD (Channel 2)
Low level
High level
High level
Low level
Operation
Up-count
Down-count
Rev. 2.00, 03/05, page 707 of 884