h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 326

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 10 16-Bit Timer Pulse Unit (TPU)
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 10.32 Up/Down-Count Conditions in Phase Counting Mode 1
[Legend]
Rev. 2.00 Dec. 05, 2005 Page 288 of 724
REJ09B0200-0200
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 10.25 shows an example of phase counting mode 1 operation, and table 10.32
summarizes the TCNT up/down-count conditions.
Rising edge
Falling edge
TCNT value
Figure 10.25 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
Down-count
Operation
Up-count
Down-count
Time