HD6432670 Hitachi, HD6432670 Datasheet - Page 603

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

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.
1. Phase counting mode 1
Table 11.32 Up/Down-Count Conditions in Phase Counting Mode 1
Legend
TCLKA (Channels 1 and 5)
TCLKC (Channels 2 and 4)
High level
Low level
High level
Low level
TCLKA (channels 1 and 5)
TCLKC (channels 2 and 4)
TCLKB (channels 1 and 5)
TCLKD (channels 2 and 4)
Figure 11.25 shows an example of phase counting mode 1 operation, and table 11.32
summarizes the TCNT up/down-count conditions.
: Rising edge
: Falling edge
TCNT value
Figure 11.25 Example of Phase Counting Mode 1 Operation
Up-count
TCLKB (Channels 1 and 5)
TCLKD (Channels 2 and 4)
Low level
High level
High level
Low level
Rev. 2.0, 04/02, page 557 of 906
Down-count
Operation
Up-count
Down-count
Time