HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 603

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

(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 15.15 shows an example of phase counting mode 1 operation, and table 15.8 summarizes
the TCNT up/down-count conditions.
Table 15.8 Up/Down-Count Conditions in Phase Counting Mode 1
[Legend]
TPU_TI2A (Channel 2)
TPU_TI3A (Channel 3)
High level
Low level
High level
Low level
: Rising edge
: Falling edge
Examples of Phase Counting Mode Operation
Phase counting mode 1
TPU_ TI2A (channel 2)
TPU_ TI3A (channel 3)
TPU_ TI2B (channels 2)
TPU_ TI3B (channels 3)
TCNT value
Figure 15.15
Up-count
Example of Phase Counting Mode 1 Operation
TPU_TI2B (Channel 2)
TPU_TI3B (Channel 3)
Low level
High level
High level
Low level
Rev. 3.00 Jan. 18, 2008 Page 541 of 1458
Section 15
Down-count
16-Bit Timer Pulse Unit (TPU)
Operation
Up-count
Down-count
REJ09B0033-0300
Time