HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 379

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

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 9.26 shows an example of phase counting mode 1 operation, and
table 9.8 summarizes the TCNT up/down-count conditions.
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
Table 9.8
Legend:
TCLKA (Channel 1)
TCLKC (Channel 2)
High level
Low level
High level
Low level
: Rising edge
: Falling edge
TCNT value
Up/Down-Count Conditions in Phase Counting Mode 1
Figure 9.26 Example of Phase Counting Mode 1 Operation
Up-count
TCLKB (Channel 1)
TCLKD (Channel 2)
Low level
High level
High level
Low level
Rev.3.00 Mar. 26, 2007 Page 337 of 772
Section 9 16-Bit Timer Pulse Unit (TPU)
Down-count
Operation
Up-count
Down-count
REJ09B0355-0300
Time