R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 358

• Manufacturer Part Number: R5F61525
• Description: 32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 16-Bit Timer Pulse Unit (TPU)
(2)
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.
(a)
Figure 9.26 shows an example of phase counting mode 1 operation, and table 9.35 summarizes the
TCNT up/down-count conditions.
Table 9.35 Up/Down-Count Conditions in Phase Counting Mode 1
[Legend]
Rev. 3.00 Mar. 14, 2006 Page 320 of 804
REJ09B0104-0300
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)
: Rising edge
: Falling edge
Examples of Phase Counting Mode Operation
Phase counting mode 1
TCNT value
Figure 9.26 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
Down-count
Operation
Up-count
Down-count
Time