HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 701

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

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.
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:
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
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.
: Rising edge
: Falling edge
TCNT value
Figure 16.26 Example of Phase Counting Mode 1 Operation
Up-count
TCLKB (Channel 1)
TCLKD (Channel 2)
Low level
High level
High level
Low level
Down-count
Operation
Up-count
Down-count
Time
689