Datasheet

Section 10 16-Bit Timer Pulse Unit (TPU)
Rev.6.00 Mar. 18, 2009 Page 461 of 980
REJ09B0050-0600
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
Figure 10.25 shows an example of phase counting mode 1 operation, and table 10.32
summarizes the TCNT up/down-count conditions.
TCNT value
Time
Down-count
Up-count
TCLKA (channels 1 and 5)
TCLKC (channels 2 and 4)
TCLKB (channels 1 and 5)
TCLKD (channels 2 and 4)
Figure 10.25 Example of Phase Counting Mode 1 Operation
Table 10.32 Up/Down-Count Conditions in Phase Counting Mode 1
TCLKA (Channels 1 and 5)
TCLKC (Channels 2 and 4)
TCLKB (Channels 1 and 5)
TCLKD (Channels 2 and 4) Operation
High level Up-count
Low level
Low level
High level
High level Down-count
Low level
High level
Low level
Legend:
: Rising edge
: Falling edge