Figure 12.26 Example Of Phase Counting Mode 1 Operation; Table 12.20 Up/Down-Count Conditions In Phase Counting Mode 1 - Renesas H8S Series Hardware Manual

(2) 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 12.26 shows an example of phase counting mode 1 operation, and table 12.20
summarizes the TCNT up/down-count conditions.
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
TCNT value

Figure 12.26 Example of Phase Counting Mode 1 Operation

Table 12.20 Up/Down-Count Conditions in Phase Counting Mode 1

TCLKA (Channel 1)
TCLKC (Channel 2)
High level
Low level
High level
Low level
[Legend]
: Rising edge
: Falling edge
Up-count
TCLKB (Channel 1)
TCLKD (Channel 2)
Low level
High level
High level
Low level
Section 12 16-Bit Timer Pulse Unit (TPU)
Down-count
Operation
Up-count
Down-count
Rev. 3.00 Jul. 14, 2005 Page 353 of 986
REJ09B0098-0300
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